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Pipistrel VIRUS SW 121 Pilot Operating Handbook

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PILOT OPERATING
HANDBOOK
VIRUS SW 121
Document No.: POH-121-00-40-001_B00
REVISION B00
Date of Issue: December 20
PIPISTREL VERTICAL SOLUTIONS d.o.o.
Vipavska cesta 2
SI-5270 Ajdovščina
Slovenia
Tel: + 386 5 36 63 873
Fax: + 386 5 36 61 263
Email: info@pipistrel.si
All rights reserved. Reproduction or disclosure to third parties of this document or any
part thereof is not permitted, except with the prior and express written permission of
Pipistrel Group's R&D division, Pipistrel Vertical Solutions d.o.o., which is authorized to
publish technical documentation for Pipistrel Group's subsidiaries.
, 2018
th

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Vern
April 4, 2025

Does the virus have flaps to use on takeoffs?

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1 comments:
Mr. Anderson
April 4, 2025

Yes, the Pipistrel Virus SW 121 has flaps for takeoff, with the takeoff setting being +1.

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Summary of Contents for Pipistrel VIRUS SW 121

  • Page 1 All rights reserved. Reproduction or disclosure to third parties of this document or any part thereof is not permitted, except with the prior and express written permission of Pipistrel Group’s R&D division, Pipistrel Vertical Solutions d.o.o., which is authorized to publish technical documentation for Pipistrel Group’s subsidiaries.
  • Page 2 Virus SW 121 Pilot Operating Handbook Pilot Operating Handbook Virus SW 121 Registration: ____________________________ Serial No.: ____________________________ Digitally signed by Vid Plevnik Reason: HOA Location: Ajdovscina, Slovenia, EU Authorized signature: ____________________________ Date: 2018/12/20 21:35 +02'00' Authority: Verified and approved under the authority of DOA No.: EASA.21J.524...
  • Page 3 Virus SW 121 Pilot Operating Handbook Table of contents SECTION CONTENTS FOREWORD GENERAL LIMITATIONS EMERGENCY PROCEDURES NORMAL PROCEDURES PERFORMANCE DATA WEIGHT AND BALANCE AIRPLANE DESCRIPTION HANDLING, SERVICING AND MAINTENANCE SUPPLEMENTS POH-121-00-40-001 PAGE PAGE REV. 0...
  • Page 4 The same system applies when the header, figure or any other element inside this POH is revised. A list of revisions is located at the beginning of the log of effective pages. Pipistrel is not responsible for technical changes/updates to OEM manuals supplied with the aircraft (eg.
  • Page 5 Virus SW 121 Pilot Operating Handbook Index of document revisions Doc. Description Reason for revision Affected pages Authority Rev. First EASA EASA Pre-TC Updates Pre-TC Updates EASA 1-2, 1-12, 2-8, 2-10, 2-18, 2-20, 3-15, Intentional Spinning ap- EASA proved 3-16, 3-28, 4-21,...
  • Page 6 Virus SW 121 Pilot Operating Handbook List of effective pages NOTE: Since the last revision, A05, this POH has undergone a major design/ format change, which is why the document revision is B00 and all the page revisions have been reset to 0. The changes and amendments made, how- ever, have been marked by a vertical bar, so as to highlight the differences between document revisions A05 and B00.
  • Page 7 Virus SW 121 Pilot Operating Handbook List of effective pages (continued) PAGE PAGE PAGE PAGE PAGE PAGE PAGE PAGE NUMBER REV. NUMBER REV. NUMBER REV. NUMBER REV. 7 - 25 9 - 1 6 - 1 4 - 29 7 - 26...
  • Page 8 Virus SW 121 Pilot Operating Handbook List of effective pages (continued) PAGE PAGE NUMBER REV. 9-S4 - 1 9-S4 - 2 9-S4 - 3 9-S4 - 4 blank 9-S4 - 5 9-S4 9-S4 - 6 9-S4 - 7 blank 9-S4 - 8...
  • Page 9 SECTION...

  • Page 10: Table Of Contents

    Virus SW 121 Pilot Operating Handbook SECTION 1 – GENERAL TABLE OF CONTENTS PART SUBJECT PAGE NUMBER INTRODUCTION DESCRIPTION CERTIFICATION BASIS THREE VIEW DRAWINGS DIMENSIONS AND WEIGHTS SYSTEMS Powerplant Propeller Fuel System Landing Gear Ballistic Parachute Rescue System (BPRS) SYMBOLS, ABBREVIATIONS and TERMINOLOGY...

  • Page 11: Introduction

    1.2. DESCRIPTION The Virus SW 121 is a two-seat aircraft of composite construction. The aircraft is arranged as a high wing mono-plane with cantilevered wings and a con- ventional empennage with a T-tail. The aircraft has a tricycle landing gear. It is equipped with a 73,5 kW Rotax 912 S3.
  • Page 12 Virus SW 121 SECTION 1 Pilot Operating Handbook GENERAL 1.4. THREE VIEW DRAWING Figure 01-001 Virus SW 121 POH-121-00-40-001 PAGE PAGE REV. 0...

  • Page 13: Dimensions And Weights

    Virus SW 121 SECTION 1 Pilot Operating Handbook GENERAL 1.5. DIMENSIONS AND WEIGHTS Basic Dimensions Metric Imperial Length 6.45 m 21.15 ft Span 10.70 m 35.13 ft Height 2.06 m 6.75 ft Wing Area 9.51 m² 102.4 ft² Span 10.70 m 35.13 ft...

  • Page 14: Fuel System

    Virus SW 121 SECTION 1 Pilot Operating Handbook GENERAL diameter. Construction is fiber reinforced wooden laminated core. 1.6.3. FUEL SYSTEM The airplane uses two integral tanks located in the left and right wing, with header tanks present downstream from the main tanks before the fuel se- lector with three different positions: LEFT, RIGHT, OFF.

  • Page 15: Symbols, Abbreviations And Terminology

    Virus SW 121 SECTION 1 Pilot Operating Handbook GENERAL 1.7. SYMBOLS, ABBREVIATIONS AND TERMINOLOGY 1.7.1. GENERAL AIRSPEED TERMINOLOGY AND SYMBOLS KCAS Knots Calibrated Airspeed is the indicated airspeed corrected for position and instrument error. Calibrated airspeed is equal to true airspeed in stan- dard atmosphere at sea level.
  • Page 16 Virus SW 121 SECTION 1 Pilot Operating Handbook GENERAL 1.7.2. METEOROLOGICAL TERMINOLOGY Instrument Meteorological Conditions are meteorological conditions expressed in terms of visibility, distance from cloud, and ceiling less than the minima for visual flight defined in FAR 91.155. International Standard Atmosphere (standard day) is an atmosphere...
  • Page 17 Virus SW 121 SECTION 1 Pilot Operating Handbook GENERAL 1.7.3. ENGINE POWER TERMINOLOGY Horsepower is the power developed by the engine. Maximum Continuous Power is the maximum power that can be used continuously. Manifold Pressure is the pressure measured in the engine’s induction system expressed as inHg.
  • Page 18 Virus SW 121 SECTION 1 Pilot Operating Handbook GENERAL Mean Aerodynamic Chord is the chord drawn through the centroid of the wing plan area. LEMAC Leading Edge of Mean Aerodynamic Chord is the forward edge of MAC aft of the reference datum.

  • Page 19: Conversion Table

    Virus SW 121 SECTION 1 Pilot Operating Handbook GENERAL 1.7.6. CONVERSION TABLE 1 bar 14.5037 psi 1 psi 0.0689 bar 1 mm2 0.0016 in2 1 in2 625 mm2 1 cm2 0.1550 in2 1 in2 6.4510 cm2 1 daN 2.2481 lbf 1 lbf 0.4448 daN...
  • Page 20 This page is intentionally left blank.
  • Page 21 SECTION...
  • Page 22 Virus SW 121 SECTION 2 Pilot Operating Handbook LIMITATIONS SECTION 2 – LIMITATIONS TABLE OF CONTENTS PART SUBJECT PAGE NUMBER INTRODUCTION AIRSPEED LIMITATION AIRSPEED INDICATOR MARKINGS ENGINE LIMITATIONS ENGINE INSTRUMENT MARKINGS WEIGHT AND CENTER OF GRAVITY LIMITS OCCUPANCY FUEL OIL/COOLANT 2.10...

  • Page 23: Introduction

    Virus SW 121 SECTION 2 Pilot Operating Handbook LIMITATIONS 2.1 INTRODUCTION This section provides operating limitations, instrument markings and basic placards necessary for the safe operation of the airplane and its standard systems and equipment. Refer to section 9 for operating limitations for op- tional equipment.

  • Page 24: Airspeed Indicator Markings

    Virus SW 121 SECTION 2 Pilot Operating Handbook LIMITATIONS 2.3 AIRSPEED INDICATOR MARKINGS The airspeed indicator markings are based upon the airspeed calibration using the normal static source. Speeds are KIAS. MARKING VALUE REMARKS Flap Operating Range. Lower limit is the most White adverse stall speed in the landing configuration.

  • Page 25: Engine Instrument Markings

    Virus SW 121 SECTION 2 Pilot Operating Handbook LIMITATIONS Normal Oil Pressure 2.0 – 5.0 bar 7.0* bar Maximum Oil Pressure *permissible for a short period after cold start Minimum Oil Temperature 50° C Normal Oil Temperature 80° C - 110° C Maximum Oil Temperature 130°...

  • Page 26: Weight And Center Of Gravity Limits

    Virus SW 121 SECTION 2 Pilot Operating Handbook LIMITATIONS 2.6 WEIGHT AND CENTER OF GRAVITY LIMITS Maximum takeoff weight 600 kg / 1323 lbs Maximum landing weight 600 kg / 1323 lbs Maximum zero fuel weight 555 kg / 1221 lbs...

  • Page 27: Oil/Coolant

    Virus SW 121 SECTION 2 Pilot Operating Handbook LIMITATIONS OIL/COOLANT Approved oil: AeroShell Oil Sport PLUS 4 (and equivalents as per Rotax specification). Maximum oil capacity 3.5 liter Minimum oil required marked on dipstick Approved coolant* 50/50 water/antifreeze mixture Min/max coolant quantity...

  • Page 28: Temperature Limits

    Virus SW 121 SECTION 2 Pilot Operating Handbook LIMITATIONS 2.13 TEMPERATURE LIMITS The structure has been tested to + 55° C. Refer to AMM chapter 4 for ap- proved colors and makings. 2.14 MINIMUM FLIGHT CREW The minimum flight crew is one pilot.

  • Page 29: Operational Restrictions

    Virus SW 121 SECTION 2 Pilot Operating Handbook LIMITATIONS Oil Quantity Indicator — Oil Temperature Indication — Parachute Rescue System — — — Autopilot System — — — Autopilot Pitch Servo — — — Autopilot Roll Servo — — —...

  • Page 30: Pfd/Autopilot Restrictions

    Virus SW 121 SECTION 2 Pilot Operating Handbook LIMITATIONS Avoid applying more than 75% rudder deflection during cruise/climb as this may cause a pitch-down moment. The 12 V power outlets are not approved to supply power to flight-criti- cal communication or navigation devices.

  • Page 31: Placards

    Virus SW 121 SECTION 2 Pilot Operating Handbook LIMITATIONS 2.18 PLACARDS 2.18.1. PLACARDS (EXTERNAL) Next to each wing fuel tank filler neck: Next to each wing fuel tank filler neck: Next to nose wheel: Next to main wheels: On each main landing gear wheel fairing:...
  • Page 32 Virus SW 121 SECTION 2 Pilot Operating Handbook LIMITATIONS Next to door opening latches: Next to fuel drain: 2.18.2 PLACARDS (ENGINE COMPARTMENT) On coolant bottle, oil bottle: APPROVED POH-121-00-40-001 PAGE 2-12 PAGE REV. 0...
  • Page 33 Virus SW 121 SECTION 2 Pilot Operating Handbook LIMITATIONS 2.18.3 PLACARDS (INSTRUMENT PANEL) The BATTERY CAUTION placard is found on aircraft VSW121001 - VSW1210039 that comply with SB-121-00-80- 008. It is also found on aircraft VSW1210040 - VSW1210048: 2.18.4 PLACARDS (CENTER CONSOLE)
  • Page 34 Virus SW 121 SECTION 2 Pilot Operating Handbook LIMITATIONS Next to choke and throttle levers: On flap lever (2x): Next to cabin-air control lever: Next to parking brake lever: 2.18.5 PLACARDS (CABIN) Next to fuel level indicators: Fuel selector: On the dashboard:...
  • Page 35 Virus SW 121 SECTION 2 Pilot Operating Handbook LIMITATIONS Next to microphone jacks: Next to headphone jacks: In front of control sticks (rudder pedal adjustment, 2x): Below each door to depict door handle operation: On upper tube in front of pilot:...
  • Page 36 Virus SW 121 SECTION 2 Pilot Operating Handbook LIMITATIONS 2.18.6 PLACARDS (BALLISTIC PARACHUTE RESCUE SYSTEM) On/adjecent to parachute rescue system hatch and over rocket position: Next to doors: Next to rocket exhaust (bottom of fuselage): Next to activation handle (cockpit):...
  • Page 37 SECTION...
  • Page 38 Virus SW 121 Pilot Operating Handbook SECTION 3 – EMERGENCY PROCEDURES TABLE OF CONTENTS PART SUBJECT PAGE NUMBER INTRODUCTION AIRSPEEDS FOR EMERGENCY OPERATIONS GROUND EMERGENCIES Engine Fire During Engine Start Emergency Engine Shutdown On Ground Emergency Ground Egress IN-FLIGHT EMERGENCIES...
  • Page 39 Virus SW 121 SECTION 3 Pilot Operating Handbook EMERGENCY PROCEDURES PART SUBJECT PAGE NUMBER 3.10 GENERATOR FAILURE 3-20 3.11 ENGINE INDICATING SYSTEM FAILURE 3-21 3.12 COMMUNICATION FAILURE 3-21 PITOT STATIC MALFUNCTION 3-21 3.13 Static Source Blocked Pitot Tube Blocked 3.14...
  • Page 40 This page is intentionally left blank.

  • Page 41: Introduction

    Virus SW 121 SECTION 3 Pilot Operating Handbook EMERGENCY PROCEDURES INTRODUCTION This section provides procedures for handling emergencies and critical flight situations. Although emergencies caused by airplane, systems, or engine malfunctions are extremely rare, the guidelines described in this section should be considered and applied as necessary should an emer- gency arise.

  • Page 42: Airspeeds For Emergency Operations

    Virus SW 121 SECTION 3 Pilot Operating Handbook EMERGENCY PROCEDURES The Ballistic Parachute Rescue System (BPRS) should be activated in the event of a life-threatening emergency where BPRS deployment is deter- mined to be safer than continued flight and landing.

  • Page 43: Emergency Engine Shutdown On Ground

    Virus SW 121 SECTION 3 Pilot Operating Handbook EMERGENCY PROCEDURES 3.3.2 EMERGENCY ENGINE SHUTDOWN ON GROUND Throttle Lever IDLE Fuel Selector Ignition Switch Master Switch 3.3.3 EMERGENCY GROUND EGRESS Engine SHUTDOWN Parking brake ENGAGED Seat belts RELEASE Airplane EXIT While exiting the airplane, make sure evacuation path is clear of other air- craft, spinning propellers, and other hazards.

  • Page 44: Engine Failure In Flight

    Virus SW 121 SECTION 3 Pilot Operating Handbook EMERGENCY PROCEDURES If time permits: Throttle Lever IDLE Master Switch Seat Belts ENSURE SECURED 3.4.2 ENGINE FAILURE IN FLIGHT If the engine fails at altitude, pitch as necessary to establish best glide speed.

  • Page 45: Engine Partial Loss Of Power

    Virus SW 121 SECTION 3 Pilot Operating Handbook EMERGENCY PROCEDURES Restarting the engine in flight after failure The following procedures address the most common causes for engine loss. Switching tanks and cranking will enhance starting if fuel contamination was the cause of the failure.

  • Page 46: Low Oil Pressure

    Virus SW 121 SECTION 3 Pilot Operating Handbook EMERGENCY PROCEDURES WARNING: If there is a strong smell of fuel in the cockpit, divert to the nearest suitable landing field. Fly a forced landing pattern and shut down the engine fuel supply once a safe landing is assured.

  • Page 47: Propeller Governor Failure

    Virus SW 121 SECTION 3 Pilot Operating Handbook EMERGENCY PROCEDURES tion to confirm oil pressure has actually been lost. If low oil pressure is accompanied by normal oil temperature, it is possible that the oil pressure sensor, gauge, or relief valve is malfunctioning. In any case, land as soon as practical and determine cause.

  • Page 48: Fire In Flight

    Virus SW 121 SECTION 3 Pilot Operating Handbook EMERGENCY PROCEDURES 3.5 FIRE IN FLIGHT 3.5.1 SMOKE IN THE COCKPIT If smoke and/or fumes are detected in the cabin, check the engine param- eters for any sign of malfunction. If a fuel leak has occurred, actuation of electrical components may cause a fire.

  • Page 49: Wing Fire In Flight

    Virus SW 121 SECTION 3 Pilot Operating Handbook EMERGENCY PROCEDURES Throttle Lever Full Forward Ignition Switch Land AS SOON AS POSSIBLE 3.5.3 WING FIRE IN FLIGHT NAV/STROBE Light Switch Fuel level light Side slip to keep flames away from fuel...

  • Page 50: Spins

    Virus SW 121 SECTION 3 Pilot Operating Handbook EMERGENCY PROCEDURES CAUTION When Master Switch is turned OFF, the engine will continue to run but the power to the Electronic Flight Displays will be cut. Refer to ana- logue instruments for the continuation of flight.

  • Page 51: Bprs Deployment

    Virus SW 121 SECTION 3 Pilot Operating Handbook EMERGENCY PROCEDURES Apply full rudder deflection in direction opposite the spin Lower the nose towards the ground to build speed (Stick forward) As rotation stops, neutralize rudder Establish horizontal flight without exceeding g-load or airspeed lim-...
  • Page 52 Virus SW 121 SECTION 3 Pilot Operating Handbook EMERGENCY PROCEDURES NOTE: Pull handle strongly at least 30 centimeters to make sure activation is successful. WARNING Rapidly pulling the activation T-handle will greatly increase the pull forces required to activate the rocket. Use a firm and steady pulling motion.

  • Page 53: Landing Emergencies

    Virus SW 121 SECTION 3 Pilot Operating Handbook EMERGENCY PROCEDURES LANDING EMERGENCIES If all attempts to restart the engine failure and a forced landing is imminent, select a suitable field and prepare for the landing. If flight conditions or terrain does not permit a safe landing, BPRS deployment may be required.

  • Page 54: Landing Without Elevator Control

    Virus SW 121 SECTION 3 Pilot Operating Handbook EMERGENCY PROCEDURES UNLATCH before impact with Doors water Airplane EVACUATE INFLATE WHEN CLEAR OF Flotation Devices AIRPLANE NOTE: If available, life preservers should be donned and life raft should be prepared for immediate evacuation upon touchdown. Consider OPENING a door prior to assuming the emergency landing body position in order to provide a ready escape path.

  • Page 55: Landing With A Defective Main Landing Gear Tire

    Virus SW 121 SECTION 3 Pilot Operating Handbook EMERGENCY PROCEDURES 3.8.4 LANDING WITH A DEFECTIVE MAIN LANDING GEAR TIRE Land the airplane at the edge of the runway that is located on the side of the intact tire, so that changes in direction during roll-out due to the braking action of the defective tire can be corrected on the runway.

  • Page 56: Generator Failure

    Virus SW 121 SECTION 3 Pilot Operating Handbook EMERGENCY PROCEDURES PFD - Loss of Air Data In the event the PFD detects a loss of air data (dual ADAHRS failure), or data is unreliable, the affected indicator is removed from the display and replaced with a red “X”.

  • Page 57: Engine Indicating System Failure

    Virus SW 121 SECTION 3 Pilot Operating Handbook EMERGENCY PROCEDURES case of a battery failure. To assure generator restart power is available if the generator fails, the battery disconnect switch should not be pulled during flight. NOTE: If it is necessary to reduce electrical loads due to an generator mal- function, switch off electrical components and/or systems that are not essen- tial for the current flight conditions rather than pulling circuit breakers.

  • Page 58: Pitot Tube Blocked

    Virus SW 121 SECTION 3 Pilot Operating Handbook EMERGENCY PROCEDURES NOTE: Referring to the GPS for flying, adjust indicated airspeed during climb or approach. Use +10 KTS on top of standard procedure as guidance and observe the wind situation. Pitot Tube Blocked If only the airspeed indicator is providing erroneous information, and in icing conditions, the most probable cause is pitot ice.

  • Page 59: Exceeding

    Virus SW 121 SECTION 3 Pilot Operating Handbook EMERGENCY PROCEDURES WARNING After pulling the battery disconnect switch an engine restart will no longer be possible! NOTE: When EarthX battery type is installed, battery over-voltage, low volt- age or other battery system malfunctions, are additionally indicated by the Batt Caution light on the switch panel.
  • Page 60 This page is intentionally left blank.
  • Page 61 Virus SW 121 SECTION 3 Pilot Operating Handbook EMERGENCY PROCEDURES 3.18 CHECKLISTS EMERGENCY PROCEDURES APPROVED POH-121-00-40-001 PAGE 3-25 PAGE REV. 0...
  • Page 62 This page is intentionally left blank.
  • Page 63 GROUND EMERGENCIES ENGINE FIRE DURING ENGINE START Starter KEEP CRANKING Fuel Selector Throttle Lever FULL FORWARD If flames are estinghuished: Ignition Switch Master Switch If flames persist: perform Emergency engine shutdown on Ground and Emergency egress checklist. EMERGENCY ENGINE SHUTDOWN Throttle Lever IDLE Fuel Selector...
  • Page 64 IN FLIGHT EMERGENCIES ENGINE FAILURE AT TAKE OFF (LOW ALT) Best Glide or Landing ESTABILISH (see POH) Speed (as appropriate) Fuel Selector Ignition Switch Flaps as required If time permits: Throttle Lever IDLE Master Switch Seat belts ensure secured ENGINE FAILURE IN FLIGHT Best Glide Speed ESTABILISH (70 KIAS) Fuel Selector...
  • Page 65 ENGINE PARTIAL POWER LOSS Fuel Selector SWITCH TANKS Throttle Lever Sweep Ignition Switch BOTH, L, then R Land AS SOON AS POSSIBLE If engine stops: perform engine failure in flight check-list LOW OIL PRESSURE Throttle Lever Minimum Required Land AS SOON AS POSSIBLE PROPELLER GOVERNOR FAILURE Propeller RPM will not increase: Land...
  • Page 66 SMOKE IN THE COCKPIT Temperature control knob COLD Airflow direction knob Feet position Fan Toggle Switch Cabin Air Selector Door Windows OPEN If source of smoke is firewall forward: Cabin Air Selector Fan Toggle Switch Door Windows As required Land AS SOON AS POSSIBLE If airflow is not sufficient to clear smoke or fumes from cabin:...
  • Page 67 WING FIRE IN FLIGHT NAV/STROBE Light Switch Fuel Level Light Side slip to keep flames away from fuel tank and If possible cabin Land AS SOON AS POSSIBLE COCKPIT FIRE IN FLIGHT Cabin Air Selector Cabin Heating Battery disconnect switch PULL Master Switch Fire Extinguisher...
  • Page 68 SPIN RECOVERING TECHNIQUE Throttle Lever IDLE Full deflection - direction Rudder opposite to the spin Forward - lower the nose Stick to build us speed As rotation stops: Rudder Neutralize Establish horizontal flight without exceeding g-load or airspeed limitations BPRS DEPLOYMENT Airspeed MINIMUM POSSIBLE Ignition switch...
  • Page 69 LANDING EMERGENCIES ENMERGENCY LANDING WITHOUT ENGINE POWER Best Glide Speed ESTABLISH - 70 KIAS Transmit (121.5 MHz) Radio MAYDAY giving location and intentions Transponder SQUAWK 7700 ACTIVATE Throttle Lever IDLE Fuel Selector Ignition Switch Flaps (When landing is assured) Master Switch Seat Belts SECURED DITCHING...
  • Page 70 LANDING WITHOUT ELEVATOR CONTROL Flaps Trim SET 60 KIAS Throttle Lever as required for glide angle LANDING WITH DEFECTIVE BRAKES Safety Harnesses SECURED After safe touch-down Ignition Fuel Selector Master Switch GENERATOR FAILURE Switch OFF Unnecessary equipment (to redurce loads) Voltage monitor Land...
  • Page 71 COMMUNICATION FAILURE Switches, Controls, CHECK Volume Frequency CHANGE Circuit Breakers CHECK Headset CHANGE Transmission ATTEMPT If unsuccessful: TRANSPONDER SQUAWK 7600 PITOT STATIC MALFUNCTION Refer to GPS for flying: +10 KTS for procedures, Ground speed indicator observe winds TRIM / AUTOPILOT FAILURE Graps stick - maintain Airplane Control manually...
  • Page 72 BATT OVERVOLTAGE / MALFUNCTION Battery Disconnect Switch PULL PAGE POH-121-00-40-001 3-36 PAGE REV. 0...
  • Page 73 SECTION...
  • Page 74 Virus SW 121 Pilot Operating Handbook SECTION 4 – NORMAL PROCEDURES TABLE OF CONTENTS PART SUBJECT PAGE NUMBER INTRODUCTION AIRSPEEDS FOR NORMAL OPERATIONS PREFLIGHT INSPECTION Preflight Walk-Around STARTING THE ENGINE 4-10 Before Starting the Engine Starting the Engine Before Taxiing...

  • Page 75: Part Subject

    Virus SW 121 SECTION 4 Pilot Operating Handbook NORMAL PROCEDURES PART SUBJECT PAGE NUMBER 4.16 SPINNING (INTENTIONAL SPINS) 4-21 4.17 CHECKLIST - NORMAL PROCEDURES 4-25 POH-121-00-40-001 PAGE PAGE REV. 0...
  • Page 76 This page is intentionally left blank.

  • Page 77: Introduction

    Virus SW 121 SECTION 4 Pilot Operating Handbook NORMAL PROCEDURES INTRODUCTION This section provides amplified procedures for normal operation. AIRSPEEDS FOR NORMAL OPERATION Unless otherwise noted, the following speeds are based on a maximum mass of 600 kg and may be used for any lower actual mass. However, to achieve the performance specified in Section 5 for takeoff and landing dis- tance, the speed correction appropriate to the particular mass must be used.

  • Page 78: Preflight Inspection

    Virus SW 121 SECTION 4 Pilot Operating Handbook NORMAL PROCEDURES 4.3 PREFLIGHT INSPECTION Before carrying out preflight inspections, ensure that all required mainte- nance has been performed. Review your flight plan and compute weight and balance. NOTE: Throughout the walk-around: check all visible hinges, hinge pins, and bolts for security;...
  • Page 79 Virus SW 121 SECTION 4 Pilot Operating Handbook NORMAL PROCEDURES Fuel selector Select fullest tank Flaps Check handle movement Avionics switch Master switch Circuit breakers LEFT FUSELAGE COM antenna (top) Condition and attachment Wing / fuselage seal CHECK XPDR antenna (underside)
  • Page 80 Virus SW 121 SECTION 4 Pilot Operating Handbook NORMAL PROCEDURES Door lock Unlock Parachute cover, strap covers Sealed and secure RIGHT WING Condition, security and Flaperon movement Flaperon gap seal Security, no wrinkles Hinges, bolts and safety nuts Secure CHECK attachment...
  • Page 81 Virus SW 121 SECTION 4 Pilot Operating Handbook NORMAL PROCEDURES WARNING: Keep clear of propeller rotation plane. Do not allow others to approach propeller. ENGINE AND NOSE LANDING GEAR AREA Check quantity, leaks, cap Engine oil and door secure Condition, security and...

  • Page 82: Starting The Engine

    Virus SW 121 SECTION 4 Pilot Operating Handbook NORMAL PROCEDURES Strobe, NAV light and lens Condition and attachment Condition, attachment, Flaperon movement Flaperon gap seal Condition, no wrinkles Hinges, bolts and safety nuts Secure Water drain holes Clean STARTING ENGINE 4.4.1...
  • Page 83 Virus SW 121 SECTION 4 Pilot Operating Handbook NORMAL PROCEDURES 4.4.2 STARTING ENGINE If the engine is warm, no choke is required. For the first start of the day and in cold conditions, applying choke will be necessary. If the airplane will be started using external power, keep all personnel and power unit cables well clear of the propeller rotation plane.

  • Page 84: Before Taxiing

    Virus SW 121 SECTION 4 Pilot Operating Handbook NORMAL PROCEDURES 4.4.3 BEFORE TAXIING Flaps (-) or (0) Radios / Avionics As required Cabin Heat / Defrost As required SWITCH TANK Fuel Selector (to check flow from both tanks) CHECK (refer to OEM for periodical testing) 4.4.4.

  • Page 85: Before Takeoff

    Virus SW 121 SECTION 4 Pilot Operating Handbook NORMAL PROCEDURES 4.4.5 BEFORE TAKEOFF During cold weather operations, the engine should be properly warmed up before takeoff. In most cases this is accomplished when the oil temperature has reached at least 50° C. In warm or hot weather, precautions should be taken to avoid overheating during prolonged ground engine operation.
  • Page 86 Virus SW 121 SECTION 4 Pilot Operating Handbook NORMAL PROCEDURES BEFORE TAKEOFF Seat Belts and Shoulder Harness Secure BPRS activation handle Verify Pin Removed Airbrakes Closed and locked Flaps Set (+1) Trim Set neutral Fuel tank selector Select fullest tank...

  • Page 87: Takeoff

    Virus SW 121 SECTION 4 Pilot Operating Handbook NORMAL PROCEDURES 4.5 TAKEOFF 4.5.1 POWER CHECK Check full-throttle engine operation early in takeoff run. The engine should run smoothly and turn approximately 5700 RPM. All engine parameters should read in the green. If power is not developed, abort take-off.

  • Page 88: Short Field Takeoff

    Virus SW 121 SECTION 4 Pilot Operating Handbook NORMAL PROCEDURES Airspeed indication Check Elevator Control Rotate smoothly at 45-48 KIAS At 70 KIAS, Flaps Retract to (0) SHORT FIELD TAKEOFF Flaps (+1) Airbrakes Closed and locked Brakes Hold Propeller lever...

  • Page 89: Cruise

    Virus SW 121 SECTION 4 Pilot Operating Handbook NORMAL PROCEDURES NOTE: V : 60 KIAS [flaps (0)], V : 78 KIAS [flaps (0)] Climb Power/RPM Best Climb Speed = 78 KIAS Engine Parameters Check CAUTION: Avoid prolonged use of more than 75% rudder deflection as this may result in a pitch-down moment.

  • Page 90: Descent/Approach

    Virus SW 121 SECTION 4 Pilot Operating Handbook NORMAL PROCEDURES 4.8 DESCENT/APPROACH Altimeter Autopilot Disengage Cabin Heat/Defrost As required Landing Light Fuel System Check Parking brake Disengaged Brake pressure Check (pump pedals) Seat Belt and Shoulder Harness Secure 4.9 BEFORE LANDING...

  • Page 91: Balked Landing

    Virus SW 121 SECTION 4 Pilot Operating Handbook NORMAL PROCEDURES Actual touchdown should be made with power idle and on the main wheels first to reduce the landing speed and subsequent need for braking. Gently lower the nose wheel to the runway after airplane speed has diminished.

  • Page 92: After Landing

    Virus SW 121 SECTION 4 Pilot Operating Handbook NORMAL PROCEDURES After clear of obstacles: Flaps Airspeed Best climb speed 4.12 AFTER LANDING Throttle Lever IDLE Flaps (-) or (0) Transponder STBY Lights As required Airbrakes Close at taxi speed 4.13...

  • Page 93: Soft Field Operations

    Virus SW 121 SECTION 4 Pilot Operating Handbook NORMAL PROCEDURES NOTE: Park on level terrain, excessive bank (one wing lower than the other) will result in fuel spilling from fuel vents. 4.15 SOFT FIELD OPERATIONS As described in 4.5.2. and 4.10.
  • Page 94 Virus SW 121 SECTION 4 Pilot Operating Handbook NORMAL PROCEDURES Adjust pedal position so that it is possible for the pilot to easily control the rudder with full-deflections. Fasten seat-belts properly: excessive elevator push-over during spin recovery may result in negative G accelerations.
  • Page 95 Virus SW 121 SECTION 4 Pilot Operating Handbook NORMAL PROCEDURES 4.17 CHECKLISTS NORMAL PROCEDURES POH-121-00-40-001 PAGE 4-23 PAGE REV. 0...
  • Page 96 This page is intentionally left blank.
  • Page 97 PREFLIGHT WALK-AROUND CABIN UNLOCK/OPEN/ Doors CLOSE/SECURE BPRS Handle / Pin CHECK, Pin inserted Ignition Switch CHECK OFF Green Electrical Switches All OFF Required Documents On Board Battery Disconnect Switch CONNECT Flight Controls, Flaps and Free and Correct Airbrakes Master Switch Avionics Switch Circuit Breakers PFD / MFD...
  • Page 98 LEFT FUSELAGE COM Antenna (top) Condition and attachment Wing / Fuselage Seal CHECK condition XPDR Antenna Condition and attachment (underside) VOR Antenna Condition and attachment (if applicable) Baggage Compartment Baggage secured Closed and secured Baggage Door (locked) Static Pressure Port CHECK for blockage Fuel System water drain Perform...
  • Page 99 RIGHT FUSELAGE (continue) Door Lock Unlock BPRS Cover, Strap Covers Condition and attachment RIGHT WING Flaperon Condition and movement CHECK condition, Flaperon Gap Seal attachment and no wrinkles CHECK condition and Hinges, Bolts, Safety Nuts secured CHECK attachment CHECK condition and Strobe, NAV lights attachment Leading Edge...
  • Page 100 PROPELLER AND COWLINGS AREA Engine Cowlings Attachment secured Propeller CHECK condition Condition, attachment, Spinner oil leaks Air inlets and Outlets Unobstructed ENGINE AND NOSE LANDING GEAR AREA CHECK quantity, leaks, Engine Oil cap and door secured CHECK security and Exhaust Pipe condition Gascolator Drain 1 cup, sample...
  • Page 101 RIGHT WING Flaperon Condition and movement CHECK condition, Flaperon Gap Seal attachment and no wrinkles CHECK condition and Hinges, Bolts, Safety Nuts secured CHECK attachment CHECK condition and Strobe, NAV lights attachment Leading Edge CHECK condition CHECK quantity and Fuel Cap secure Water Drain Holes Clean...
  • Page 102 STARTING ENGINE BEFORE STARTING ENGINE Preflight Inspection Completed Fuel Quantity Sufficient Emergency Equipment On board Passenger Briefed BPRS Safety Pin Removed Seats, Pedals, Seat belts Adjust and Secure and Baggage Parking Brake Disengage Brakes Hold Master Switch Avionics Switch NAV / Strobe Lights Doors Closed and latched STARTING ENGINE...
  • Page 103 STARTING ENGINE (continue) Throttle Lever Open 10 mm Oil Pressure Indication Available START Ignition Switch (release after engine starts) Maintain 2500 RPM Throttle Lever or below Oil Pressure CHECK Choke Slowly close Engine Parameters Monitor Ammeter / Indication CHECK BEFORE TAXIING Flaps (0) or (-) COM / Avionics...
  • Page 104 BEFORE TAKEOFF ENGINE TEST Brakes HOLD Doors Latched Choke Verify CLOSED Throttle Lever 4000 RPM Check value Alternator and Warning light Voltage CHECK Value RIGHT, note RPM, Ignition Switch then BOTH LEFT, note RPM, Ignition Switch then BOTH Cycle 3 times, Propeller Lever observe RPM drop Propeller Lever...
  • Page 105 BEFORE TAKEOFF (continue) NAV / Strobe / Landing As required Lights Circuit Breakers CHECK NAV/COM, GPS, XPDR Autopilot Check disconnect Annunciator (PFD) CHECK Altimeter Engine Parameters CHECK Flight Controls Free and Correct TAKEOFF NORMAL TAKEOFF Release Brakes (steer with rudder only) Propeller Lever Full Forward Throttle Lever...
  • Page 106 SHORT FIELD TAKEOFF Flaps (+1) Brakes HOLD Propeller Lever Full Forward Throttle Lever Full Forward Engine Parameters CHECK Release Brakes (steer with rudder only) Airspeed Indication CHECK Rotate smoothly Elevator Control at 45 KIAS Airspeed at Obstacle 60 KIAS at 70 KIAS > FLAPS CLIMB Climb Power / RPM Flaps...
  • Page 107 CRUISE (continue) Engine Parameters CHECK Switch to the other tank Fuel Selector every 30 min Autopilot As required DESCENT / APPROACH Altimeter Autopilot Disengage Cabin heat / Defrost As required Landing Light Fuel Selector Fullest Tank Parking Brake Disengaged CHECK Brake Pressure (pump pedals) Seat Belts...
  • Page 108 BALKED LANDING Throttle Lever Check Full Forward Airbrakes CLOSE Flaps (+1) Airspeed 57 - 60 KIAS After Clear of Obstacles: Flaps Airspeed - 78 KIAS AFTER LANDING Throttle Lever IDLE Flaps (-) or (0) Transponder STBY Lights As required Airbrakes Close at taxi speed SHUT DOWN Green Electrical Switches...
  • Page 109 SHUT DOWN (continue) Avionics Switch Master Switch Transmit Light OUT PARKING BPRS Safety Pin CHECK Inserted / Secured ENGAGED Parking Brake Only if necessary Fuel Selector Pitot Covers Installed Chocks, Tie-downs As required POH-121-00-40-001 PAGE 4-37 PAGE REV. 0...
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  • Page 111 SECTION...
  • Page 112 Virus SW 121 SECTION 5 Pilot Operating Handbook PERFORMANCE DATA SECTION 5 – PERFORMANCE DATA TABLE OF CONTENTS PART SUBJECT PAGE NUMBER INTRODUCTION OUTSIDE AIR TEMPERATURE FOR ISA-CONDITION WIND COMPONENT AIRSPEED CALIBRATION STALL SPEED TAKEOFF RATE OF CLIMB (V 5-10...

  • Page 113: Introduction

    Virus SW 121 SECTION 5 Pilot Operating Handbook PERFORMANCE DATA 5.1. INTRODUCTION The performance tables and diagrams on the following pages show the per- formance of the airplane. The data presented in these tables and diagrams has been derived from test–flights using an airplane and engine in good operating condition, and was corrected to standard atmospheric conditions 15˚...

  • Page 114: Outside Air Temperature For Isa-Condition

    Virus SW 121 SECTION 5 Pilot Operating Handbook PERFORMANCE DATA 5.2. OUTSIDE AIR TEMPERATURE FOR ISA-CONDITION Pressure ISA-40° C ISA-20° C ISA+10° C ISA+20° C Altitude [ft] 1000 2000 3000 4000 5000 6000 7000 8000 9000 10000 11000 12000 13000...

  • Page 115: Wind Component

    Virus SW 121 SECTION 5 Pilot Operating Handbook PERFORMANCE DATA 5.3. WIND COMPONENT EXAMPLE: Runway Heading: 10° Wind Direction: 60° Angle between wind and runway: 50° Wind Velocity: 15 Knots Component parallel: ~9,6 Knots Component perpendicular: ~11,5 Knots APPROVED POH-121-00-40-001 PAGE PAGE REV.

  • Page 116: Airspeed Calibration

    Virus SW 121 SECTION 5 Pilot Operating Handbook PERFORMANCE DATA 5.4. AIRSPEED CALIBRATION Conditions Power: power level for level flight, or max. continuous power whichever is less NOTE: Indicated airspeed values assume zero instrument error. KCAS KIAS Flaps (-) Flaps (0)
  • Page 117 Virus SW 121 SECTION 5 Pilot Operating Handbook PERFORMANCE DATA KIAS/KCAS Diagram APPROVED POH-121-00-40-001 PAGE PAGE REV. 0...

  • Page 118: Stall Speed

    Virus SW 121 SECTION 5 Pilot Operating Handbook PERFORMANCE DATA 5.5. STALL SPEED Conditions Power: idle Propeller: full forward (fine pitch) NOTE: The recovery altitude necessary is very dependent on the tempo of recovery. Typical loss of altitude for recovery:...

  • Page 119: Takeoff

    Virus SW 121 SECTION 5 Pilot Operating Handbook PERFORMANCE DATA 5.6. TAKE-OFF Conditions Power: throttle full open Propeller: full forward (fine pitch) Flaps: (+1) Runway: dry, paved and level Wind: calm Correction Factors Headwind: Subtract 10% for each 12 knots headwind.
  • Page 120 Virus SW 121 SECTION 5 Pilot Operating Handbook PERFORMANCE DATA TEMPERATURE PRESSURE DISTANCE Altitude [ft] 0° C 10° C 20° C 30° C 40° C 3° C/ISA Ground roll 6000 50 ft Speed at Liftoff: 47 KIAS Speed over 50 ft: 60 KIAS (V 5.7.

  • Page 121: Climb Gradient

    Virus SW 121 SECTION 5 Pilot Operating Handbook PERFORMANCE DATA 5.8. CLIMB GRADIENT (VX) NOTE: Angle of climb data shown is for information only, appropriate pilot procedures should be followed for non-ISA conditions. Pressure Climb CLIMB ANGLE / GRADIENT WEIGHT ...
  • Page 122 Virus SW 121 SECTION 5 Pilot Operating Handbook PERFORMANCE DATA Parameters PRESSURE Altitude KTAS FF (liter/h) (%MCP) 5500 27.7 100% 28.8 5500 26.7 22.4 2000 ft 5300 25.7 18.4 4900 24.7 16.0 4600 24.0 14.4 Parameters PRESSURE Altitude KTAS FF (liter/h)
  • Page 123 Virus SW 121 SECTION 5 Pilot Operating Handbook PERFORMANCE DATA Parameters PRESSURE Altitude KTAS FF (liter/h) (%MCP) Not achievable Not achievable 8000 ft 5500 22.0 23.6 5300 21.7 21.2 5100 21.0 18.0 Parameters PRESSURE Altitude KTAS FF (liter/h) (%MCP) Not achievable...
  • Page 124 Virus SW 121 SECTION 5 Pilot Operating Handbook PERFORMANCE DATA 5.10. LANDING Conditions Wind: zero Runway: dry, level and paved Flaps: (+2) Airbrakes: 1/2 extension Power: 3° power approach to 50 ft height, then reduce power smoothly continue to reach idle just at touch.
  • Page 125 Virus SW 121 SECTION 5 Pilot Operating Handbook PERFORMANCE DATA Weight: 600 kg TEMPERATURE PRESSURE DISTANCE Altitude [ft] 0° C 10° C 20° C 30° C 40° C Ground roll Total over 50 ft TEMPERATURE PRESSURE DISTANCE Altitude [ft] 0° C 10°...
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  • Page 127 SECTION...
  • Page 128 Virus SW 121 SECTION 6 Pilot Operating Handbook WEIGHT AND BALANCE SECTION 6 – WEIGHT AND BALANCE TABLE OF CONTENTS PART SUBJECT PAGE NUMBER INTRODUCTION C.G. SAMPLE CALCULATION WEIGHT AND BALANCE CHART APPROVED POH-121-00-40-001 PAGE PAGE REV. 0...
  • Page 129 Virus SW 121 SECTION 6 Pilot Operating Handbook WEIGHT AND BALANCE INTRODUCTION This section provides information about how to calculate the takeoff weight and C.G. of the aircraft. Once calculated, these two values can be used to find a point on the weight and balance chart (see section 6.3) and thus de- termine whether aircraft is within the flight limits (see section 2.6).
  • Page 130 Virus SW 121 SECTION 6 Pilot Operating Handbook WEIGHT AND BALANCE 6.2 C.G. SAMPLE CALCULATION The calculation below is an example of how to calculate the aircraft’s takeoff weight and C.G.. Except for the arm values in italic font, the values do not apply to any particular aircraft and are for illustration purposes only.
  • Page 131 WEIGHT AND BALANCE 6.3 WEIGHT AND BALANCE CHART The chart below shows the Virus SW 121’s mass-CG envelope. Once the aircraft’s takeoff weight and C.G. have been calculated, they can be used to find a point in the chart and determine whether or not the aircraft is within the flight limits.
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  • Page 133 SECTION...
  • Page 134 Virus SW 121 SECTION 7 Pilot Operating Handbook AIRPLANE DESCRIPTION SECTION 7 – AIRPLANE DESCRIPTION TABLE OF CONTENTS PART SUBJECT PAGE NUMBER INTRODUCTION AIRCRAFT STRUCTURE Fuselage Wings Empennage FLIGHT CONTROL SYSTEM Elevator Control System Aileron Control System Rudder Control System...
  • Page 135 Virus SW 121 SECTION 7 Pilot Operating Handbook AIRPLANE DESCRIPTION PART SUBJECT PAGE NUMBER Engine Monitoring Instruments Propeller FUEL SYSTEM 7-13 ELECTRICAL SYSTEM 7-15 Electrical System Power Generation Power Distribution Switches Warning Lights Circuit Breakers and Fuses Miscellaneous Components LIGHTNING...
  • Page 136 Virus SW 121 SECTION 7 Pilot Operating Handbook AIRPLANE DESCRIPTION PART SUBJECT PAGE NUMBER Communication (COM) Transceivers Navigation (NAV) Transceivers (Optional) Transponder Audio System Hour Meter 7.16 AUTOPILOT 7-30 7.17 EMERGENCY LOCATOR TRANSMITTER (ELT) 7-31 BALLISTIC PARACHUTE RESCUE SYSTEM 7-33 BPRS) 7.18...

  • Page 137: Introduction

    Virus SW 121 SECTION 7 Pilot Operating Handbook AIRPLANE DESCRIPTION INTRODUCTION This section provides a basic description and operation of the standard air- plane and its systems. Optional equipment described within this section is identified as optional. NOTE: Some optional equipment, primarily avionics, may not be described in this section.
  • Page 138 Virus SW 121 SECTION 7 Pilot Operating Handbook AIRPLANE DESCRIPTION The wing shell is designed as a 2-cell CFRP sandwich shell which is closed by a rear shear web to which the flaperons are attached. The wings are connected as it is classic with gliders by two spar ends being connected with two main bolts.

  • Page 139: Flight Control System

    Virus SW 121 SECTION 7 Pilot Operating Handbook AIRPLANE DESCRIPTION FLIGHT CONTROL SYSTEM The aircraft uses conventional flight controls for ailerons, elevator and rud- der. The control surfaces are pilot controlled through either of two control sticks positioned centrally in front of each pilot. The location and design of the control sticks allow easy, natural use by the pilots.

  • Page 140: Wing Flaps Control System

    Virus SW 121 SECTION 7 Pilot Operating Handbook AIRPLANE DESCRIPTION The nose wheel is part of the yaw control system and is moved whenever the pedal is pressed. Cables for nosewheel steering run from the bellcranks be- hind the seats forward to the nosewheel hinge element, where a anti-shim- my damper is also connected to.

  • Page 141: Landing Gear

    Virus SW 121 SECTION 7 Pilot Operating Handbook AIRPLANE DESCRIPTION LANDING GEAR 7.4.1 MAIN GEAR The landing gear is a conventional, fixed tricycle type. The main landing gear consists of a single composite landing gear strut made of glass fibre. The strut is composed by two parallel elements producing a semi-redundant structure and allowing for predictable locations of stress points.

  • Page 142: Airplane Cabin

    Virus SW 121 SECTION 7 Pilot Operating Handbook AIRPLANE DESCRIPTION and then reapply the brakes with heavy pressure. If the brakes are spongy or pedal travel increases, pumping the pedals may build braking pressure. CAUTION: Do not pull the PARK BRAKE knob in flight. If a landing is made with the parking brake valve set, the brakes will maintain any pressure ap- plied after touchdown.

  • Page 143: Baggage Compartments

    Virus SW 121 SECTION 7 Pilot Operating Handbook AIRPLANE DESCRIPTION 7.5.3 SEATS The seating arrangement consists of two seats, comprising a bottom cush- ion and hard padded back panel. The back panel rests on the cockpit aft bulkhead. The seats are not adjustable in position or recline, however the back panel can be removed/reclined to access the baggage compartment.

  • Page 144: Powerplant

    Virus SW 121 SECTION 7 Pilot Operating Handbook AIRPLANE DESCRIPTION POWERPLANT 7.6.1 ENGINE The engine installed is a Rotax 912 S3 engine providing 73.5 kW takeoff pow- er. All limits as defined by the engine manufacturer apply. The engine can be operated with MOGAS or AVGAS 100LL, with max.

  • Page 145: Engine Operating Controls

    Virus SW 121 SECTION 7 Pilot Operating Handbook AIRPLANE DESCRIPTION Engine Fuel Ignition Dual self-powered electronic ignition drive two spark plugs in each cylin- der. The system is denominated as Magnetos, as it mimics the typical func- tionality of mechanical magnetos. Normal operation is conducted with both magnetos, as more complete burning of the fuel-air mixture occurs with dual ignition.

  • Page 146: Engine Monitoring Instruments

    Virus SW 121 SECTION 7 Pilot Operating Handbook AIRPLANE DESCRIPTION netos’’) are grounded and will not operate. Normally, the engine is operated on both magnetos (switch in BOTH position) except for magneto checks and emergency operations. The R and L positions are used for individual mag- neto checks and for single magneto operation when required.

  • Page 147: Fuel System

    Virus SW 121 SECTION 7 Pilot Operating Handbook AIRPLANE DESCRIPTION toring functionality. 7.6.5 PROPELLER The airplane is equipped with a constant-speed, two-blade composite propeller (MT Propeller type MTV-33, diameter 1700 mm) and governor. The propeller governor automatically adjusts propeller pitch to regulate pro- peller and engine RPM.
  • Page 148 Virus SW 121 SECTION 7 Pilot Operating Handbook AIRPLANE DESCRIPTION tor removes water that may be in the fuel and filters out any debris/foreign material larger than 60 microns. Two fuel flow sensors are used to measure flow in feed and return lines and calculate fuel flow whch is displayed on the MFD.

  • Page 149: Electrical System

    Virus SW 121 SECTION 7 Pilot Operating Handbook AIRPLANE DESCRIPTION Fuel Quantity Indicator A visual fuel quantity indicator is provided for each fuel tank. The tube is placarded for quantity in Liters and USGal, as well as colorcoded. Do not attempt to takeoff in the area of fuel quantity designated with RED.

  • Page 150: Power Distribution

    Virus SW 121 SECTION 7 Pilot Operating Handbook AIRPLANE DESCRIPTION The circuit breakers (CB) are located under the switch/fuses of the switch panel. An ammeter and a voltmeter are integrated in the MFD system and they are displayed on EMS mode display to monitor electrical system oper- ating.
  • Page 151 Virus SW 121 SECTION 7 Pilot Operating Handbook AIRPLANE DESCRIPTION Garmin GTR225 transceiver 0.5 A (Typical) (optionally can be installed GNC255 transceiver.) 4.2 A (Max) 1.1 A (Typical) Garmin GTX328ES transponder 3.1 A (Max) Landing light Nav lights 0.27 A Strobe lights 0.44 A...

  • Page 152: Warning Lights

    Virus SW 121 SECTION 7 Pilot Operating Handbook AIRPLANE DESCRIPTION position prior to activating the MASTER switches, starting the engine, or ap- plying an external power source. Battery Disconnect Switch The battery can be disconnected from the circuit. There are two handles in the cockpit used to operate the battery connection: the battery discon- nection lever and the battery disconnection ring.

  • Page 153: Circuit Breakers And Fuses

    Virus SW 121 SECTION 7 Pilot Operating Handbook AIRPLANE DESCRIPTION 7.8.6 CIRCUIT BREAKERS AND FUSES Individual electrical circuits connected to the Main and Avionicsl Buses in the airplane are protected by re-settable circuit breakers mounted in the circuit breaker panel, part of the main switch panel below the instrument panel.

  • Page 154: Interior Lightning

    Virus SW 121 SECTION 7 Pilot Operating Handbook AIRPLANE DESCRIPTION 7.9.2 INTERIOR LIGHTNING Instrument Lights Mechanical instruments, Airspeed Indicator and Altimeter are TSO’d and internally illuminated. Other instrumentation has backlit dimmable LCD dis- plays and illuminated buttons. Panel Flood Lights A cabin flood-light is present and provides illumination to master electrical panel and circuit breakers.
  • Page 155 Virus SW 121 SECTION 7 Pilot Operating Handbook AIRPLANE DESCRIPTION Cabin Air Selector This is the shut-off valve from the firewall forward compartment into the cab- in. The stainless steel ON/OFF valve is controlled by a push-pull knob on the bottom of the switch panel, next to the battery disconnect ring.

  • Page 156: Pitot System

    Virus SW 121 SECTION 7 Pilot Operating Handbook AIRPLANE DESCRIPTION Windshield defrost To activate windshield defrost turn the temperature knob on the cabin heat panel to HOT (upper knob, full right), select windshied as direction of airflow (bottom knob full left) and engage the fan (ON).
  • Page 157 Virus SW 121 SECTION 7 Pilot Operating Handbook AIRPLANE DESCRIPTION source for the Multifunction Display. A mechanical altimeter and airspeed indicator are in the top segment of the instrument panel in case of total or partial PFD failure. Attitude information to the autopilot are provided straight from the dual ADAHRS units, the PFD’s...

  • Page 158: Flight Instruments

    Virus SW 121 SECTION 7 Pilot Operating Handbook AIRPLANE DESCRIPTION Center Console A center console contains (front-to-back) the parking brake lever, throttle lever, choke lever, propeller lever, fuel selector, elevator trim knob/indicator and indicator and the flap lever. On the ceiling there is the airbrakes acti- vation handle.
  • Page 159 Virus SW 121 SECTION 7 Pilot Operating Handbook AIRPLANE DESCRIPTION 7.14.1 ATTITUDE DIRECTION INDICATOR (ADI) Air Data The airspeed tape to the left of the main ADI begins indicating at 20 Knots Indicated Airspeed (KIAS) and is color-coded to correspond with airspeeds...

  • Page 160: Attitude Indicator

    Virus SW 121 SECTION 7 Pilot Operating Handbook AIRPLANE DESCRIPTION of navigation data, selecting the display format of the navigation data, and for selecting the type of compass rose and moving map to be displayed are along the right and bottom side of the PFD. The active flight plan contained...

  • Page 161: Turn Coordinator

    Virus SW 121 SECTION 7 Pilot Operating Handbook AIRPLANE DESCRIPTION of feet and sweeps the scale every 10,000 feet (each increment equals 200 feet). The short narrow pointer indicates tens of thousands feet and sweeps from 0 (zero) to 2 (20,000 feet with each increment equal to 2000 feet).
  • Page 162 Virus SW 121 SECTION 7 Pilot Operating Handbook AIRPLANE DESCRIPTION The standard avionics configuration consists of: Display Garmin GDU 370 (PFD) Display Garmin GDU 370 (MFD) ADHARS Garmin GSU25 (2x) AOA Pitot probe Garmin GAP26 EIS Garmin GEA 24 (Engine Data Acquisition unit)
  • Page 163 Virus SW 121 SECTION 7 Pilot Operating Handbook AIRPLANE DESCRIPTION The Garmin GTR 225 or GNC 255 (optional) is designated as COM. COM provides transceiver active and standby frequency indication, frequency memory storage, and knob operated frequency selection. The COM trans- ceiver provides either 760-channel (25 kHz spacing) or 2280-channel (8.33...
  • Page 164 Virus SW 121 SECTION 7 Pilot Operating Handbook AIRPLANE DESCRIPTION Headset/Microphone Installation The airplane is equipped with provisions for two headsets with integrated microphones. The microphone-headsets use remote Push-To-Talk (PTT) switches located on the top of the associated control stick grip. The micro- phone (MIC) and headset jacks for the pilots are located on the upper part of the back cockpit wall.
  • Page 165 Virus SW 121 SECTION 7 Pilot Operating Handbook AIRPLANE DESCRIPTION In flight director only mode, “FD” will be displayed in the autopilot annuncia- tion field, the command bars will be visible and green, and the pilot is expect- ed to actuate the flight controls as required to track the bars.
  • Page 166 Virus SW 121 SECTION 7 Pilot Operating Handbook AIRPLANE DESCRIPTION tion for normal operations. A remote switch and indicator panel is installed on top-right side of the instrument panel. The transmitter unit is mounted longitudinally in the airplane in order to detect deceleration greater than 3.5 ft/sec...
  • Page 167 Virus SW 121 SECTION 7 Pilot Operating Handbook AIRPLANE DESCRIPTION 7.18 BALLISTIC PARACHUTE RESCUE SYSTEM (BPRS) The aircraft is equipped with the Ballistic Parachute Rescue System (BPRS) designed to bring the aircraft and its occupants to the ground in the event of a life-threatening emergency.
  • Page 168 Virus SW 121 SECTION 7 Pilot Operating Handbook AIRPLANE DESCRIPTION 7.18.2 ACTIVATION The BPRS is activated by an activation handle, located between the occu- pant seats on the tubular structure overhead. Pulling the activation T-handle will activate the rocket and initiate the BPRS deployment sequence.
  • Page 169 Virus SW 121 SECTION 7 Pilot Operating Handbook AIRPLANE DESCRIPTION 7.18.3 DEPLOYMENT CHARACTERISTICS When the rocket launches, the parachute assembly is extracted outward due to rocket thrust and rearward due to relative airflow. In approximately two seconds the parachute will begin to inflate.
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  • Page 171 SECTION...
  • Page 172 Virus SW 121 Pilot Operating Handbook SECTION 8 – HANDLING AND SERVICING TABLE OF CONTENTS PART SUBJECT PAGE NUMBER INTRODUCTION AIRPLANE INSPECTION PERIODS PILOT CONDUCTED MAINTENANCE CHANGES AND REPAIRS SERVICING Tire Servicing Brake Servicing Propeller Servicing Oil Servicing Fuel System Servicing...

  • Page 173: Introduction

    Virus SW 121 SECTION 8 Pilot Operating Handbook HANDLING AND SERVICING INTRODUCTION The airplane owner should establish contact with the dealer or certified ser- vice station for service and information. All correspondence regarding the airplane must include its serial number (see tail-mounted type dataplate).

  • Page 174: Changes And Repairs

    Virus SW 121 SECTION 8 Pilot Operating Handbook HANDLING AND SERVICING The following is a list of the maintenance that the pilot may perform: Remove, install, and repair tires. Clean, grease, or replace wheel bearings. Replace defective safety wire or cotter pins.

  • Page 175: Brake Servicing

    Virus SW 121 SECTION 8 Pilot Operating Handbook HANDLING AND SERVICING 8.5.2 BRAKE SERVICING Brake Hydraulic Fluid Replenishing The brake system is filled with DOT-4 hydraulic brake fluid. The fluid level should be checked at every oil change and at the annual / 100 h inspec- tions, replenishing the system when necessary.

  • Page 176: Fuel System Servicing

    Virus SW 121 SECTION 8 Pilot Operating Handbook HANDLING AND SERVICING Add oil through filler as required to maintain level between indicat- ed min and max ticks. The capacity of oil bottle is 3.5 liters. Reinstall dipstick and secure cap.
  • Page 177 Virus SW 121 SECTION 8 Pilot Operating Handbook HANDLING AND SERVICING NOTE: Do not permit fuel nozzle to come in contact with bottom of fuel tanks. Keep fuel tanks at least half full at all times to minimize condensation and moisture accumulation in tanks.

  • Page 178: Ground Handling

    Virus SW 121 SECTION 8 Pilot Operating Handbook HANDLING AND SERVICING CAUTION: Make sure the gascolator sampling outlet has been closed and is not leaking fuel before flight. GROUND HANDLING 8.6.1 APPLICATION OF EXTERNAL POWER No dedicated ground service receptacle is available, however it is possible to connect a battery-booster or external power to battery plus terminal and exhaust.G!
  • Page 179 Virus SW 121 SECTION 8 Pilot Operating Handbook HANDLING AND SERVICING 8.6.2 TAXIING / GROUND MOVEMENTS Before attempting to taxi the airplane, ground personnel should be instruct- ed and authorized by the owner to taxi the airplane. Instruction should in- clude engine starting and shutdown procedures in addition to taxi and steer- ing techniques.

  • Page 180: Cleaning Exterior Surfaces

    Virus SW 121 SECTION 8 Pilot Operating Handbook HANDLING AND SERVICING Chock both main gear wheels. Tie down airplane. Install a pitot head cover. Fold the bottom part of the seat up (vertically) to prevent any mois- ture from accumulating below the seat.
  • Page 181 Virus SW 121 SECTION 8 Pilot Operating Handbook HANDLING AND SERVICING Flush away loose dirt with water Apply cleaning solution with a soft cloth, a sponge or a soft bristle To remove exhaust stains, allow the solution to remain on the surface To remove stubborn grease, use a cloth dampened with degreaser or naphtha.

  • Page 182: Cleaning Interior Surfaces

    Virus SW 121 SECTION 8 Pilot Operating Handbook HANDLING AND SERVICING Place a large pan under the engine to catch waste. Remove induction air filter and seal off induction system inlet. With the engine cowling removed, spray or brush the engine with solvent or a mixture of solvent and degreaser.
  • Page 183 Virus SW 121 SECTION 8 Pilot Operating Handbook HANDLING AND SERVICING CAUTION: To avoid solution dripping onto display and possibly migrating into component, apply the cleaning solution to cloth first, not directly to the display screen. Use only a lens cloth or nonabrasive cotton cloth to clean display screens.
  • Page 184 Virus SW 121 SECTION 8 Pilot Operating Handbook HANDLING AND SERVICING Soiled upholstery, may be cleaned with approved products. Avoid soaking or harsh rubbing. Carpets To clean carpets, first remove loose dirt with a whiskbroom or vacuum. For soiled spots and stubborn stains use a non-flammable, dry cleaning fluid.
  • Page 185 SECTION...
  • Page 186 Virus SW 121 Pilot Operating Handbook SECTION 9 – SUPPLEMENTS LIST OF EFFECTIVE PAGES Any revision or addition of effective supplements must be recorded in the table. A black vertical line in the left hand margin and the revision no. will indicate the new or amended text in the revision.
  • Page 187 SUPPLEMENT 9-S1...
  • Page 188 Virus SW 121 Pilot Operating Handbook SECTION 9 – SUPPLEMENT 9-S1 KANNAD AF406 COMPACT 406 MHz ELT System When the KANNAD AF406 COMPACT 406 MHz ELT System is installed on the aircraft, this POH Supplement is applicable and must be inserted in the Supplements Section of the POH.
  • Page 189 Virus SW 121 SECTION 9 Pilot Operating Handbook SUPPLEMENTS SECTION 9 SUPPLEMENT 9-S1 KANNAD AF406 COMPACT 406 MHz ELT System Signature: ____________________________ Authority: ____________________________ Stamp: ____________________________ Date of Approval: ____________________________ POH-121-00-40-001 PAGE 9-S1-3 PAGE REV. 0...
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  • Page 191 Virus SW 121 SECTION 9 Pilot Operating Handbook SUPPLEMENTS SECTION 3: EMERGENCY PROCEDURES 3.21 ELT SYSTEM 3.21.1 FORCED LANDING Before performing a forced landing activate the ELT transmitter manually by turning the ELT remote switch to the ‘ON’-position. Immediately after a...
  • Page 192 Virus SW 121 SECTION 9 Pilot Operating Handbook SUPPLEMENTS Remove avionics bay access panel along the lower aft center access panel of baggage compartment. Disconnect fixed antenna lead from front of unit. Disconnect lead from remote switch and indicator unit.
  • Page 193 Virus SW 121 SECTION 9 Pilot Operating Handbook SUPPLEMENTS operations. A red LED annunciator flashes when the ELT is transmitting. A battery pack consisting of two “D” cell lithium batteries mounts to a cover assembly within the transmitter to provide power to the transmitter. The ex- piration date of the batteries are indicated on the outside of the ELT battery case and recorded in the aircraft logs.
  • Page 194 Virus SW 121 SECTION 9 Pilot Operating Handbook SUPPLEMENTS Operators may wish to use a low quality AM broadcast receiver to deter- mine if energy is being transmitted from the antenna. When the antenna of the radio (tuning dial on any setting) is held about 6 inches from the activat- ed ELT antenna, the ELT aural tone will be heard on the AM broadcast re- ceiver.
  • Page 195 SUPPLEMENT 9-S2...
  • Page 196 Virus SW 121 Pilot Operating Handbook SECTION 9 – SUPPLEMENT 9-S2 VOR equipment When VOR equipment, including antenna, Garmin GNC 255 NAV/COM and accompanying harnesses, is installed on the aircraft, this POH Supplement is applicable and must be inserted in the Supplements Section of the POH.
  • Page 197 Virus SW 121 SECTION 9 Pilot Operating Handbook SUPPLEMENTS SECTION 9 SUPPLEMENT 9-S2 Garmin GNC 255 NAV/COM Signature: ____________________________ Authority: ____________________________ Stamp: ____________________________ Date of Approval: ____________________________ POH-121-00-40-001 PAGE 9-S2-3 PAGE REV. 0...
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  • Page 199 Virus SW 121 SECTION 9 Pilot Operating Handbook SUPPLEMENTS SECTION 7: SYSTEM DESCRIPTION NOTE: This supplement provides specific procedures for use of the GNC 255 NAVCOM and a general description of GNC 255 unit. For a detailed description of the GNC 255, refer to GARMIN GNC 255 Pilots Guide, latest revision.
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  • Page 201 SUPPLEMENT 9-S3...
  • Page 202 Virus SW 121 Pilot Operating Handbook SECTION 9 – SUPPLEMENT 9-S3 Night-VFR operations When the aircraft is equipped with the applicable NVFR equipment as de- fined by the applicable TCDS, this POH Supplement is applicable and must be inserted in the Supplements Section of the Pilot Operating Handbook.
  • Page 203 Virus SW 121 SECTION 9 Pilot Operating Handbook SUPPLEMENTS SECTION 9 SUPPLEMENT 9-S3 Night-VFR operations Signature: ____________________________ Authority: ____________________________ Stamp: ____________________________ Date of Approval: ____________________________ POH-121-00-40-001 PAGE 9-S3-3 PAGE REV. 0...
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  • Page 205 Virus SW 121 SECTION 9 Pilot Operating Handbook SUPPLEMENTS SECTION 2: LIMITATIONS 2.18 PLACARDS 2.18.7 NIGHT- VFR PLACARDS The following content does not apply to aircraft serial number VSW1210038 and all aircraft subsequently manufactured, as the placards they’re equipped with are applicable for both Day and Night-VFR operations.
  • Page 206 Virus SW 121 SECTION 9 Pilot Operating Handbook SUPPLEMENTS SECTION 3: EMERGENCY PROCEDURES 3.19 NIGHT- VFR FLYING 3.19.1 LOSS OF INSTRUMENT, CABIN OR FUEL-TANK LEVEL LIGHTING Use the flash light to illuminate the area where lighting is lost. Continue flight towards a safe landing.
  • Page 207 SECTION 4: NORMAL PROCEDURES 4.18 NIGHT-VFR OPERATIONS Virus SW 121 is not an IFR approved type. When flying Night-VFR, the pri- mary means of flying remain the external visual references which cannot be replaced with instruments. Therefore, when planning to perform night VFR flying, the necessary conditions should reasonably be expected to be main- tained for the entire duration of the flight.
  • Page 208 Virus SW 121 SECTION 9 Pilot Operating Handbook SUPPLEMENTS 4.18.1 EXTERNAL LIGHTS Taxi, take-off, landing: turn-on the landing light to illuminate the taxiway sur- face. All flight phases: keep NAV/Strobe lights ON for the entire duration of the flight. 4.18.2...
  • Page 209 AUTO function, which self-dims the lights based on the brightness sensor reading. For instructions on how to use the functions of the smart-dim, consult Section 7-Airplane Description of the Virus SW 121 main POH. POH-121-00-40-001...
  • Page 210 Virus SW 121 SECTION 9 Pilot Operating Handbook SUPPLEMENTS Figure 3 Figure 4 Glare-shield and breakers Cabin lights UV-LED lights Figure 6 Figure 5 Circuit breakers UV-LED lights Fuel tank level LED lights POH-121-00-40-001 PAGE 9-S3-10 PAGE REV. 0...
  • Page 211 SUPPLEMENT 9-S4...
  • Page 212 Virus SW 121 Pilot Operating Handbook SECTION 9 – SUPPLEMENT 9-S4 Aerotowing operations When a tow hook is installed on the aircraft, this POH Supplement is appli- cable and must be inserted in the Supplements Section of the POH. This document must be carried in the airplane at all times.
  • Page 213 Virus SW 121 SECTION 9 Pilot Operating Handbook SUPPLEMENTS SECTION 9 SUPPLEMENT 9-S4 Aerotowing operations Signature: ____________________________ Authority: ____________________________ Stamp: ____________________________ Date of Approval: ____________________________ APPROVED POH-121-00-40-001 PAGE 9-S4-3 PAGE REV. 0...
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  • Page 215 Virus SW 121 SECTION 9 Pilot Operating Handbook SUPPLEMENTS SECTION 2: LIMITATIONS 2.16 OPERATIONAL RESTRICTIONS 2.16.1 RESTRICTIONS FOR AEROTOWING OPERATIONS Take-off weight to be kept below 500 kg. Maximum weight of towed glider 600 kg. Maximum weak-link rating 300 kg. Aerotowing is only permitted within the speed range of 60-80 KIAS.
  • Page 216 Virus SW 121 SECTION 9 Pilot Operating Handbook SUPPLEMENTS 3.20.1 GUIDELINES FOR AEROTOWING EVENTUALITIES: Glider out of sight (not visible in mirror) When unsure of glider’s position/behavior, notify glider pilot, if situation con- tinues, disconnect rope. Land normally. Engine failure Notify glider pilot, disconnect rope.
  • Page 217 AEROTOWING BEFORE TAKEOFF Check for successful Rope disconnect disconnect Adjust before each tow to Mirror have clear view of the glider TAKEOFF Flaps (+1) Trim 1/2 Nose Up Lift-Off Speed 55 KIAS 60 KIAS Initial climb speed (depends on glider type) REACHING SAFE ALTITUDE (MIN 300 FT) Engine power...
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  • Page 219 Virus SW 121 SECTION 9 Pilot Operating Handbook SUPPLEMENTS 4.19 AEROTOWING This paragraph contains recommendations and establishes guidelines for operational consideration. NOTE: Total take-off distance is limited by certification basis to be less than 500 m. This is achieved by limiting the take-off mass to 500 kg and mass of towed glider to 600 kg.
  • Page 220 Virus SW 121 SECTION 9 Pilot Operating Handbook SUPPLEMENTS CAUTION: In case of engine overheating consider reducing power, increas- ing speed or disconnecting glider. BEFORE DESCENT: Glider disconnected Check mirror! Power Idle Flaps Airbrakes As desired Rope Drop before landing...
  • Page 221 Virus SW 121 SECTION 9 Pilot Operating Handbook SUPPLEMENTS SECTION 5: PERFORMANCE 5.12. AEROTOWING PERFORMANCE 5.12.1 TAKE-OFF Data is valid for a hard-surface runway. TAKE-OFF distance TOWED GROUND ROLL 15m obstacle GLIDER MASS (ISA – Sea level) (ISA – Sea level) 5.12.2...
  • Page 222 Virus SW 121 SECTION 9 Pilot Operating Handbook SUPPLEMENTS SECTION 7: AIRPLANE DESCRIPTION 7.20 TOWING EQUIPMENT The aircraft is optionally equipped with towing equipment, consisting of the composite tail attachment, containing the hook/relelase assembly, the actu- ation cable from the tail into the cabin and the yellow cockpit rope-discon- nect lever, positioned in front of the pilot on the middle console.
  • Page 223 Virus SW 121 SECTION 9 Pilot Operating Handbook SUPPLEMENTS Observe: Be especially cognizant of hangar door clearances. Release parking brake and remove chocks. Move airplane to desired location by grabbing on the tail cone. When moving backward, lower the tail to keep nose wheel off the ground.
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  • Page 226 34070 Savogna d’Isonzo (GO) Italia - EU t +39 0481 522000 f +39 0481 522110 pipistrel@legalmail.it www.pipistrel.eu Pipistrel Vertical Solutions d.o.o. Vipavska cesta 2 SI-5270 Ajdovščina Slovenija - EU t +386 5 366 38 73 f +386 5 366 12 63 info@pipistrel.si...

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