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Schempp-Hirth Flugzeugbau Ventus-2cM Flight Manual

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SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK
Model:
Type sales name:
Serial-No.:
Registr.-No.:
Date of issue:
Pages as indicated by „LBA-app." are approved by
Luftfahrt-Bundesamt
This powered sailplane is to be operated in compliance with information and limitations
contained herein.
Approval of translation has been done by best knowledge and judgment.
In any case the original text in German language is authoritative.
FLIGHT MANUAL
for Powered Sailplane
V e n t u s – 2cM
Ventus-2c(x)M
(S/N 137 and on when in compliance with MB-No. 825-44)
N o v e m b e r 2 0 0 3
(Signature)
(Authority)
(Stamp)
(Original date of approval)

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Summary of Contents for Schempp-Hirth Flugzeugbau Ventus-2cM

  • Page 1 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK FLIGHT MANUAL for Powered Sailplane V e n t u s – 2cM Model: Type sales name: Ventus-2c(x)M (S/N 137 and on when in compliance with MB-No. 825-44) Serial-No.: Registr.-No.: N o v e m b e r 2 0 0 3 Date of issue: Pages as indicated by „LBA-app.“...
  • Page 2 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2cM FLIGHT MANUAL Record of revisions Any revisions of the present manual, except actual weighing data, must be recorded in the following table and in the case of approved sections be en- dorsed by the responsible airworthiness authority.
  • Page 3 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2cM FLUGHANDBUCH / FLIGHT MANUAL 0.1 Erfassung der Berichtigungen / Records of revisions Datum der Lfd. Nr. Datum Anerkennung Datum der Zeichen durch Ein- /Unter- Berichtigung Abschnitt Seiten Berichtigung Bezug das LBA arbeitung schrift Date of...
  • Page 4 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2cM FLUGHANDBUCH / FLIGHT MANUAL 0.2 Verzeichnis der Seiten / List of effective pages Abschnitt Seite Ausgabe-Datum Bezug Affected section Affected pages Date of issue Reference 0.1.1 0.2.1 0.2.2 0.2.3 0.2.4 0.2.5 0.2.6 0.3.1 0.2.1...
  • Page 5 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2cM FLUGHANDBUCH / FLIGHT MANUAL 0.2 Verzeichnis der Seiten / List of effective pages Abschnitt Seite Ausgabe-Datum Bezug Affected section Affected pages Date of issue Reference 1.1.1 November 2003 1.1.2 November 2003 November 2003 November 2003 1.4.1...
  • Page 6 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2cM FLUGHANDBUCH / FLIGHT MANUAL 0.2 Verzeichnis der Seiten / List of effective pages Abschnitt Seite Ausgabe-Datum Bezug Affected section Affected pages Date of issue Reference 4.1.1 November 2003 4.1.2 November 2003 LBA-anerk. 4.2.1.1 November 2003 LBA-anerk.
  • Page 7 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2cM FLUGHANDBUCH / FLIGHT MANUAL 0.2 Verzeichnis der Seiten / List of effective pages Abschnitt Seite Ausgabe-Datum Bezug Affected section Affected pages Date of issue Reference 5.1.1 November 2003 5.1.2 November 2003 LBA-anerk. 5.2.1 November 2003 LBA-anerk.
  • Page 8 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2cM FLUGHANDBUCH / FLIGHT MANUAL 0.2 Verzeichnis der Seiten / List of effective pages Abschnitt Seite Ausgabe-Datum Bezug Affected section Affected pages Date of issue Reference 7.1.1 November 2003 7.1.2 November 2003 7.2.1 November 2003 7.2.2 November 2003 7.2.3...
  • Page 9 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2cM FLUGHANDBUCH / FLIGHT MANUAL 0.2 Verzeichnis der Seiten / List of effective pages Abschnitt Seite Ausgabe-Datum Bezug Affected section Affected pages Date of issue Reference 8.1.1 November 2003 8.1.2 November 2003 8.2.1 November 2003 8.2.2...

  • Page 10: Table Of Contents

    SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2cM FLIGHT MANUAL Table of contents Section General (a non-approved section) Limitations (an approved section) Emergency procedures (an approved section) Normal procedures (an approved section) Performance (a partly approved section) Weight & balance (a non-approved section)

  • Page 12: General

    SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2cM FLIGHT MANUAL Section 1 General Introduction Certification basis Warnings, cautions and notes Descriptive data Three-side view November 2003 Revision -- 1.1.1...
  • Page 13 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2cM FLIGHT MANUAL Introduction The Flight Manual for this powered sailplane has been prepared to provide pilots and instructors with information for the safe and efficient operation of the „Ventus-2cM“. This manual includes the material required to be furnished to the pilot by „JAR“, Part 22.
  • Page 14 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2cM FLIGHT MANUAL Certification basis This self-launching powered sailplane, model designation „Ventus-2cM“ has been approved by the Luftfahrt-Bundesamt (LBA) in compliance with „JAR“, Part 22 effective on June 27, 1989 (Change 4 of the English Original Issue), including additional Amendment 22/90/1.
  • Page 15 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2cM FLIGHT MANUAL Warnings, cautions and notes The following definitions apply to warnings, cautions and notes used in this flight manual: „WARNING“ means that the non-observation of the corresponding procedure leads to an immediate or important degrada- tion of the flight safety „CAUTION“...
  • Page 16 Ventus-2cM FLIGHT MANUAL Descriptive data The “Ventus-2cM” is a flap equipped, single-seat high performance powered sailplane (capable of self-launching) constructed from fiber reinforced plastic (FRP), featuring a T-tail (fixed horiz. stabilizer with elevator, fin and rudder). It can be flown in 15 m or 18 m configuration.
  • Page 17 Power plant The „Ventus-2cM“ is the self-launching variant of sailplane model “Ventus-2c”. The “Ventus-2cM” is powered by an liquid-cooled 37 kW (49.6 HP) SOLO engine type 2625-01 - having a 3 : 1 toothed belt reduction drive. The power plant is housed in the fuselage aft of the wing, and an electrical spindle drive pivots it such that the propeller pylon extends from the engine bay.
  • Page 18 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2cM FLIGHT MANUAL TECHNICAL DATA Wing Span 15,00 m 18,00 m 49,21 ft 59,06 ft Area 9,67 m² 11,03 m² 104,09 ft² 118,73 ft² Aspect ratio 23,3 29,5 0,673 m 0,648 m 2,210 ft 2,13 ft...
  • Page 19 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2cM FLIGHT MANUAL 1.5 Three-side view 18.0 m [ 59.06 ft ] 15.0 m [ 49.21 ft ] 2.5 m [ 8.20 ft ] 6.81 m [ 22.34 ft ] November 2003 Revision --...

  • Page 20: Limitations

    SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2cM FLIGHT MANUAL Section 2 Limitations Introduction Airspeed Airspeed indicator markings Power plant, fuel and oil Power plant instrument markings Weights (masses) Center of gravity Approved maneuvers Maneuvering load factors 2.10 Flight crew 2.11 Kinds of operation 2.12 Minimum equipment...
  • Page 21 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2cM FLIGHT MANUAL Introduction Section 2 includes operating limitations, instrument markings and basic placards necessary for safely operating the aircraft, its standard systems and standard equipment. The limitations included in this section and in section 9 have been approved...
  • Page 22 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2cM FLIGHT MANUAL Airspeed Airspeed limitations and their operational significance are shown below: SPEED (IAS) REMARKS Never exceed speed in calm air. 285 km/h Do not exceed this speed in any Flaps set at 154 kt operation and do not use more “-1”, “-2”, “S”...
  • Page 23 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2cM FLIGHT MANUAL Airspeed (ctd.) Speed (IAS) Remarks Maximum speed with 180 km/h Do not exceed this speed with propeller extended 97 kt propeller extended 112 mph Maximum speed for 120 km/h extending / retracting 65 kt...
  • Page 24 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2cM FLIGHT MANUAL 2.3 Airspeed indicator markings Airspeed indicator markings and their colour code significance are shown below: MARKING VALUE OR RANGE SIGNIFICANCE (IAS) White arc - 200 km/h Positive flap operating range - 108 (lower limit is the speed 1.1V...
  • Page 25 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2cM FLIGHT MANUAL Power plant, fuel and oil Engine manufacturer: Solo Kleinmotoren GmbH. 71050 Sindelfingen, Germany Engine model: SOLO 2625-01 Take-off power power at 6200 RPM (MSL, ISA): 37 kW (49.6 HP) Max. continuous power at 6200 RPM: 37 kW (49.6 HP)
  • Page 26 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2cM FLIGHT MANUAL Power plant instrument markings Power plant instrument markings and their colour code significant are shown below: Instrument Normal Range Caution Maximum Range Limit Tachometer Signal green Yellow RPM-Indicator *) Range 2500 - 6200...
  • Page 27 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2cM FLIGHT MANUAL Weights (masses) Wing span: 15 m 18 m Maximum permitted take-off mass: 525 kg 565 kg 1157 lb 1246 lb Maximum permitted landing mass: 525 kg 565 kg 1157 lb 1246 lb Maximum permitted take-off...
  • Page 28 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2cM FLIGHT MANUAL Center of gravity Center of gravity in flight Aircraft attitude: Tail jacked up such that the upper edge of a wedge 100 : 4.4 is horizontal when placed on rear top of fuselage...
  • Page 29 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2cM FLIGHT MANUAL Approved maneuvers The powered sailplane model „Ventus-2cM“ is certified in category U T I L I T Y Capable of self-launching only with 18m wing span Warning: Aerobatic maneuvers and cloud flying n o t a p p r o v e d November 2003 LBA-app.
  • Page 30 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2cM FLIGHT MANUAL Maneuvering load factors The following maneuvering load factors must not be exceeded: With airbrakes locked and at V = 200 km/h, 108 kt, 124 mph = + 5.3 - 2.65 With airbrakes locked and at V = 285 km/h, 154 kt, 177 mph = + 4.0...
  • Page 31 Ventus-2cM FLIGHT MANUAL 2.10 Flight crew The “Ventus-2cM ” is single-seated. Observe the minimum seat load – if necessary, ballast must be installed to bring the load up to a permissible figure. See also section 6.2: “Weight and Balance Record / Permitted Payload Range”.
  • Page 32 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2cM FLIGHT MANUAL 2.11 Kinds of operation With the prescribed minimum equipment installed (see page 2.12), this powered sailplane is approved for VFR-flying in daytime November 2003 LBA-app. Revision -- 2.11...
  • Page 33 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2cM FLIGHT MANUAL 2.12 Minimum equipment Instruments and other basic equipment must be of an approved type and should be selected from the list in the Maintenance Manual. Normal operations Airspeed indicator (range up to 300 km/h, 162 kt, 186 mph) with colour markings according page 2.3...
  • Page 34 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2cM FLIGHT MANUAL 2.13 Aerotow and winch launch Aerotow (propeller retracted) - only permissible with nose tow release in place - Maximum towing speed: 180 km/h (97 kt, 112 mph) Weak link in tow rope: max. 735 daN (max. 1620 lb)
  • Page 35 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2cM FLIGHT MANUAL 2.14 Other limitations N o n e November 2003 LBA-app. Revision -- 2.14...
  • Page 36 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2cM FLIGHT MANUAL 2.15 Limitation placards MAXIMUM PERMITTED ALL-UP MASS Max. permitted speed For 18 m span 1246 lb / 565 kg (IAS) Altitude For 15 m span 1157 lb / 525 kg km/h [ft] MAXIMUM PERMITTED SPEEDS (IAS) : km/h...
  • Page 37 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2cM FLIGHT MANUAL Section 3 Emergency procedures Introduction Canopy jettisoning Bailing out Stall recovery Spin recovery Spiral dive recovery Engine failure (carburetor icing) Fire Other emergencies November 2003 Revision -- 3.1.1...

  • Page 38: Emergency Procedures (An Approved Section)

    SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2cM FLIGHT MANUAL Emergency procedures Introduction Section 3 provides check lists and amplifies procedures for coping with emergencies that may occur. Emergency situations can be minimized by proper pre-flight inspections and maintenance. November 2003 Revision --...
  • Page 39 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2cM FLIGHT MANUAL Jettisoning the canopy The canopy is to be jettisoned as follows: Swing red locking lever (situated on the canopy frame on the left) b a c k w a r d (about 90°) up to its stop and swing canopy sideways fully open.
  • Page 40 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2cM FLIGHT MANUAL Bailing out For bailing out, first the power plant should be stopped and – if possible – the propeller be retracted, then the canopy is jettisoned. With the canopy gone (see section 3.2), the pilot may bail out as follows:...
  • Page 41 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2cM FLIGHT MANUAL Stall recovery Propeller retracted On stalling whilst flying straight ahead or in a banked turn, normal flying attitude is regained by firmly easing the control stick forward and, if necessary, applying opposite rudder and aileron.
  • Page 42 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2cM FLIGHT MANUAL Spin recovery A safe recovery from a spin is effected by the following method: Hold aileron neutral. Apply opposite rudder (i.e. against the direction of rotation of the spin). Ease control stick forward until rotation ceases and the airflow is restored.
  • Page 43 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2cM FLIGHT MANUAL Spiral dive recovery With the center of gravity in a forward position, a spin - depending on flap setting and use of controls - may turn into a spiral dive, which is indicated by a rapid increase in speed and acceleration.
  • Page 44 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2cM FLIGHT MANUAL Engine failure (carburetor icing) Engine failure on take-off Should the engine fail on take-off from a runway of sufficient length, land straight ahead. If the runway is too short for this, the procedure for a proper landing...
  • Page 45 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2cM FLIGHT MANUAL Engine failure in flight Should the engine fail in flight, check • fuel quantity • fuel shut-off valve (opened?). Should it be impossible to restart the engine, land with the propeller retracted. Emergency procedure for starting the engine in flight despite a defective starter motor Follow the normal checklist until the item “depress starter button”.
  • Page 46 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2cM FLIGHT MANUAL Extending / Retracting the propeller in spite of a defective engine control unit The emergency extension/retraction switch is accessible after lifting the red guard (protruding from the face of the tilt-up instrument panel).
  • Page 47 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2cM FLIGHT MANUAL Starting the engine despite a flat battery Via the optional ground service cable: Disconnect battery wiring (plug/socket) below glare shield on panel mounting frame. Connect plug with 2 pins of special starting cable to socket of aircraft wire net, clamp negative ground strap to proper terminal of an external 12 V power source and clamp power strap to positive terminal.
  • Page 48 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2cM FLIGHT MANUAL Fire • Set master switch at “OFF” • CLOSE fuel shut-off valve • Open throttle fully • Leave propeller in extended position This sequence should be followed – if possible – on the ground...
  • Page 49 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2cM FLIGHT MANUAL Other emergencies Flying with uneven water ballast If, on dumping water ballast, the wing tanks are emptying unevenly or only on one side – which is recognized at lower speeds by having to apply opposite aileron for normal flying attitude –...
  • Page 50 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2cM FLIGHT MANUAL Emergency landing with retracted undercarriage An emergency landing with the main wheel retracted is on principle not recommended, because the potential energy absorbtion of the landing gear is many times higher as compared to the fuselage shell.
  • Page 51 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2cM FLIGHT MANUAL Section 4 Normal operating procedures Introduction Assembly 4.2.1 Rigging and de-rigging 4.2.2 Refueling / Entering fuel quantity Daily inspection Pre-flight inspection Normal procedures and recommended speeds 4.5.1 Methods of launching / Engine starting, engine run up and taxiing 4.5.2...

  • Page 52: Normal Procedures

    SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2cM FLIGHT MANUAL Normal operating procedures Introduction Normal procedures associated with optional equipment are found in section 9. This section provides check lists and amplifies procedures for conducting the daily and pre-flight inspection. Furthermore this section includes normal operating procedures and recom- mended speeds.
  • Page 53 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2cM FLIGHT MANUAL Assembly 4.2.1 Rigging and de-rigging Rigging Rigging can be done by two people if a wing stand or trestle is placed under the tip of one inbd. wing panel. Prior to rigging, all connecting points (pins and corresponding bearings) on fuse lage, wing and tailplane should be cleaned and greased.
  • Page 54 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2cM FLIGHT MANUAL Outboard wing panels (15 or 18 m span) Take round-headed rigging tool, screw it into wing pin locking lever (on outbd. panel) and swing the latter upwards, thus extracting the pin from the spar stub tunnel.
  • Page 55 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2cM FLIGHT MANUAL De-rigging Remove sealing tape from wing panels and tailplane. Outboard wing panels Wing wheel: Remove if necessary. Swing up locking lever with the aid of the threaded rigging pin and carefully pull off outbd. panel(s).
  • Page 56 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2cM FLIGHT MANUAL 4.2.2 Refueling / Entering fuel quantity Internal refueling system The connecting point of the refueling system is found behind the front wing locating tube (with the GFRP access panel removed). The ON/OFF switch for the additional fuel pump is on the fairing of the wing locating tube on the port side.
  • Page 57 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2cM FLIGHT MANUAL Refueling with internal refueling system Fuselage tank Connect external filler hose to fitting and connect line of internal fuel pump to fitting (feeding the fuselage tank) - see also accompanying sketch. Fill fuselage tank by actuating the pump ON/OFF switch.
  • Page 58 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2cM FLIGHT MANUAL Refueling with internal refueling system Wing tank(s) Connect external filler hose to fitting Disconnect wing tank fuel line from line servicing the fuselage tank and connect instead the line fed by the internal fuel pump as shown in accompanying sketch.
  • Page 59 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2cM FLIGHT MANUAL Determination of fuel contents a) Fuselage tank Fuel contents in the fuselage tank are indicated by the panel-mounted ILEC control unit (maximum usable fuel is 12.5 Liters, 3.30 US Gal., 2.75 IMP Gal., displayed 12 LIT).
  • Page 60 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2cM FLIGHT MANUAL Daily inspection The importance of inspecting the aircraft after rigging and before commencing the day’s flying cannot be over-emphasized, as accidents often occur when these daily inspections are neglected or carried out carelessly.
  • Page 61 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2cM FLIGHT MANUAL Check for the presence of foreign objects g) Check fuel quantity h) Check fuel line(s) and tank vent line for proper connection i) Check main wheel tire pressure: 4.0 bar / 58 psi (see placard)
  • Page 62 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2cM FLIGHT MANUAL Check fuselage for damage, especially on its lower side. Check that the Static pressure ports for the airspeed indicator on the tail boom are clear (0.8 m / 2.62 ft forward of the base of the fin)
  • Page 63 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2cM FLIGHT MANUAL (ctd.) Check function of water pump with ignition ON. Check pump, plug and hoses for proper attachment Check coolant liquid quantity. Check cap of expansion reservoir for firm attachment Check locking of quick-disconnect coupling of fuel lines and harness connection Check condition of tail skid or wheel.
  • Page 64 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2cM FLIGHT MANUAL Check horizontal tailplane for proper attachment and locking Check elevator and rudder for free movement Check trailing edge of elevator and rudder for damage Check elevator and rudder for any unusual play by gently...
  • Page 65 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2cM FLIGHT MANUAL Pre-flight inspection CHECK LIST BEFORE TAKE-OFF Water ballast in fin tank ? (if installed) Loading charts checked ? Parachute securely fastened ? Safety harness secured and tight ? Seat back and pedals in comfortable position ?
  • Page 66 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2cM FLIGHT MANUAL Normal operating procedures and recommended speeds 4.5.1 Methods of launching Aerotow (Only permissible with nose tow release in place and propeller retracted) Maximum permitted towing speed: = 180 km/h (97 kt, 112 mph) For aerotow only the nose tow release must be used.
  • Page 67 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2cM FLIGHT MANUAL For rearward c/g positions and low all-up masses the powered sailplane is lifted off with flaps set at "0". In the case of forward c/g positions or high all-up masses a setting of "+1" or “+2”...
  • Page 68 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2cM FLIGHT MANUAL Winch launch (Only permissible with c/g tow release in place and propeller retracted) Maximum permitted launching speeds = 150 km/h (81 kt, 93 mph) For winch launching only the c/g tow release must be used.
  • Page 69 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2cM FLIGHT MANUAL CAUTION: Winch launching at the maximum permitted all-up mass of 525 kg (1157 lb) respective 565 kg (1246 lb) should only be done if there is an appropriately powerful winch and a cable in perfect condition available.
  • Page 70 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2cM FLIGHT MANUAL Engine starting, run-up and taxiing Engine run-up Apply wheel brake and proceed as shown in the following Advance to full throttle prior to or during the take-off run – make sure that check list: engine reaches a minimum speed of about 5600 to 5800 RPM and runs sound.
  • Page 71 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2cM FLIGHT MANUAL 4.5.2 Take off and climb WARNING Self-launching only permissible in 18 m configuration ! Conduct take-off check, see page 4.4) and observe page 5.2.3 (take-off distances). With a wheel fitted near the tip of the wing, the take-off run may be commenced “wing down”, otherwise it should be held level by an assistant.
  • Page 72 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2cM FLIGHT MANUAL 4.5.3 Flight a) Propeller retracted The powered sailplane has pleasant flight characteristics and can be flown effortlessly at all speeds, loading conditions (with or without water ballast), configurations and c/g positions. As the elevator trim is linked to the flaps, it should be set such that there is no load on the control stick at a speed of about 110 to 120 km/h (59-65 kt, 68-75 mph) with flaps set at "0".
  • Page 73 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2cM FLIGHT MANUAL High speed flying (propeller retracted) When flying at high speeds, particular attention must be paid to the maximum speed limits associated with the various flap settings. These speeds are clearly visible markings on the airspeed indicator (ASI) in different colours.
  • Page 74 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2cM FLIGHT MANUAL Use of the wing flaps (propeller retracted) The camber-changing flaps alter the wing section such that the laminar bucket is always well suited to the actual flying speed. Use of flaps flaps units...
  • Page 75 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2cM FLIGHT MANUAL Low speed flight and stall behaviour (propeller retracted) In order to become familiar with the powered sailplane it is recommended to explore its low speed and stall characteristics at a safe height. This should be done using the various flap settings whilst flying straight ahead and also whilst in a 45°...
  • Page 76 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2cM FLIGHT MANUAL Turning flight stalls (propeller retracted) When stalled during a coordinated 45° banked turn with the c/g at an aft position, the powered sailplane rolls slightly into the turn and, when easing the stick forward, slightly drops its nose - thereafter a normal flying attitude is regained by applying opposite rudder and aileron.
  • Page 77 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2cM FLIGHT MANUAL Flight (ctd.) Propeller extended As the propeller used is mainly pitched for good climb (rather than for high cruise), the speed attained in level flight at 6200 RPM is just about 149 km/h (80 kt, 88 mph) with flaps set at “0”.
  • Page 78 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2cM FLIGHT MANUAL Cruising on own power As clearly shown by the figures of section "Flight Performances", the longest range results from the "sawtooth"-method, which consists of the following flight sections being repeated as required: • a climb at a speed of about 95 – 100 km/h (51 – 54 kt, 59 – 62 mph) •...
  • Page 79 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2cM FLIGHT MANUAL Stopping the engine, retracting the propeller See also the following checklist: STOPPING POWER PLANT/ RETRACTING PROP O Cooling down, power setting 20% for 1 minute O Ignition OFF O With prop stopped, PULL prop arresting device...
  • Page 80 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2cM FLIGHT MANUAL Extending the prop, starting the engine in flight 1. With the prop extended and engine off, the rate of descent is approx. 2.3 m/s (453 fpm) at a speed of 105 km/h (57 kt, 65 mph), resulting in a glide ratio of only about 13 : 1 –...
  • Page 81 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2cM FLIGHT MANUAL Low speed flight and stall behaviour (propeller extended) Compared with the stall behaviour in “clean” configuration (propeller re- tracted), there are only small differences when the aircraft stalls from straight and level or from turning flight.
  • Page 82 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2cM FLIGHT MANUAL 4.5.4 Approach a) Propeller retracted or power plant removed Normal approach speed with airbrakes fully extended, flaps set at "L" and wheel down is 105 km/h (57 kt, 65 mph without water ballast, or 115 km/h (62 kt, 71 mph) at maximum permitted all-up mass.
  • Page 83 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2cM FLIGHT MANUAL Approach (ctd.) IMPORTANT NOTE 1.) In 18 m configuration and rudder displaced more than 80% of its travel, a straight flight path cannot by maintained and the aircraft will turn in the direction of the displaced rudder. Because of this behaviour, side slipping is not recommended –...
  • Page 84 Propeller extended (only with ignition OFF and in emergency case permitted) With propeller extended (ignition OFF), the "Ventus-2cM" can be landed in the same manner as in "clean" configuration (propeller retracted). Approach speed : 115 km/h [62 kt, 72 mph] (without waterballast)
  • Page 85 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2cM FLIGHT MANUAL 4.5.5 Landing Propeller retracted For off-field landings the undercarriage should always be extended as the pro- tection of the pilot is much better, especially from vertical impacts on landing. Main wheel and tail wheel (or skid) should touch down simultaneously.
  • Page 86 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2cM FLIGHT MANUAL 4.5.6 Flight with water ballast If the maximum permitted all-up mass is to be reached, it is necessary to carry water ballast. Wing ballast tanks The water tanks are integral compartments in the nose section of the inbd. wing panels and additional only in the 18m-outboard wing panels.
  • Page 87 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2cM FLIGHT MANUAL The tank on either side must always be filled with the same amount of water to prevent lateral imbalance. When taking off with partly full tanks, ensure that the wing is held level to allow the water to be equally distributed so that the wing panels are balanced.
  • Page 88 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2cM FLIGHT MANUAL Water ballast fin tank (optional) Tank label of the right hand side of the fin For optimum performance in circling flight, the forward travel of the center of gravity, caused by water ballast in the wing nose, may be compensated by carrying water ballast in the fin tank.
  • Page 89 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2cM FLIGHT MANUAL Water ballast is dumped from the fin tank through an opening on the lower side of the fuselage tail boom, adjacent to the rudder. The fin tank dump valve is linked to the torsional drive for the valves in the wing panels, so that all three tanks are always opened simultaneously.
  • Page 90 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2cM FLIGHT MANUAL GENERAL WARNING 1. On longer flights at air temperatures near 0° C (32° F), water ballast must be dumped in any case when reaching a temperature of 2° C (36° F). CAUTION 2. There is little point in loading much water ballast if the average rate of climb expected does not exceed 1.0 m/s (197 fpm).
  • Page 91 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2cM FLIGHT MANUAL 4.5.7 High altitude flight When flying at high altitude it should be noted that true airspeed (TAS) increases versus indicated airspeed (IAS). This difference does not affect the structural integrity or load factors, but to avoid any risk of flutter, the following indicated...
  • Page 92 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2cM FLIGHT MANUAL NOTE The polyester coating on this powered sailplane is known from many years experience to become very brittle at low temperature. Particularly when flying in wave at altitudes in excess of about 6000 m (approx.
  • Page 93 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2cM FLIGHT MANUAL 4.5.8 Flight in rain When flying the powered sailplane with a wet surface or in rain, the size of the water drops adhering to the wing causes a deterioration of its flight performance which cannot be expressed in numerical values due to the difficulties involved with such measurements.
  • Page 94 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2cM FLIGHT MANUAL 4.5.9 Aerobatics Aerobatic maneuvers are n o t permitted! November 2003 LBA-app. Revision -- 4.5.9...
  • Page 95 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2cM FLIGHT MANUAL Section 5 Performance Introduction LBA-approved data 5.2.1 Airspeed indicator system calibration 5.2.2 Stall speeds 5.2.3 Take-off distances 5.2.4 Additional information Additional information – LBA-approval not required 5.3.1 Demonstrated crosswind performance 5.3.2 Flight polar / Range 5.3.3...

  • Page 96: Performance

    SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2cM FLIGHT MANUAL Performance Introduction This section provides LBA-approved data for airspeed calibration, stall speeds and non-approved additional information. The data in the charts has been computed from actual flight tests with a powered sailplane in good condition and using average piloting techniques.
  • Page 97 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2cM FLIGHT MANUAL LBA-approved data 5.2.1 Airspeed indicator system calibration Errors in indicated airspeed (IAS) caused by Pitot/Static pressure errors may be read off from the calibration chart below. This chart is applicable to free flight with •...
  • Page 98 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2cM FLIGHT MANUAL 5.2.2 Stall speeds The following stall speeds (IAS) at various flap settings were determined in straight and level flight: Configuration PROPELLER RETRACTED Wing span 15 m 18 m All-up mass 400 kg 525 kg...
  • Page 99 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2cM FLIGHT MANUAL 5.2.3 Take-off distances All figures shown below refer to ICAO standard atmosphere and are based on the maximum permitted all-up mass of 565 kg (1246 lb). Ground run distance on concrete runway (0 m MSL): 248 m (813 ft)
  • Page 100 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2cM FLIGHT MANUAL 5.2.4 Additional information N o n e November 2003 LBA-app. Revision -- 5.2.4...
  • Page 101 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2cM FLIGHT MANUAL Non-LBA-approved additional information 5.3.1 Demonstrated crosswind performance The maximum crosswind velocity, at which take-offs and landings have been demonstrated, is 20 km/h (11 kt). November 2003 Revision -- 5.3.1...
  • Page 102 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2cM FLIGHT MANUAL 5.3.2 Flight polar / Range a) Propeller retracted or power plant removed All values refer to the ICAO standard atmosphere at MSL. Wing span All-up mass kg/m² 40.7 38.5 Wing loading lb/ft² 0.59 0.50...
  • Page 103 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2cM FLIGHT MANUAL km/h fpm m/s AIRSPEED (CAS) 98 0.5 all-up mass = 565 kg / 1246 lb 197 1.0 all-up mass = 490 kg / 1080 lb 295 1.5 394 2.0 SPEED POLAR DIAGRAM 492 2.5 590 3.0...
  • Page 104 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2cM FLIGHT MANUAL Range (in calm winds) a) Values below refer to level flight at cruising power (continuous RPM): Cruising speed approx.: 150 km/h (81 kt, 93 mph) Fuel consumption approx.: 17.00 Liter/h 4.49 US Gal./h 3.74 IMP Gal./h...
  • Page 105 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2cM FLIGHT MANUAL ALTITUDE (above MSL) 11483 3500 9843 3000 RATE OF CLIMB [m/s, fpm] for a mass of 485 kg (1069 lb) 8202 2500 6562 2000 4921 1500 3281 1000 CLIMB TIME [min] for 485 kg (1069 lb)
  • Page 106 5.3.3 Noise data In a climb effected according to chapter X of the “Noise Regulation for Aircraft” (LVL), the measured noise level of the “Ventus-2cM” (equipped with the Solo engine 2625-01) is 61,7 dB(A) < noise level limit 70,0 dB(A) and is thus far below (- 8,3 dB(A)) the noise level limit.
  • Page 107 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2cM FLIGHT MANUAL Section 6 Weight (mass) and balance Introduction Weight (mass) and balance record and permitted payload range Determination of: • Water ballast in wing tanks • Water ballast in fin tank November 2003 Revision --...
  • Page 108 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2cM FLIGHT MANUAL Introduction This section contains the payload range within which this powered sailplane may be safely operated. Procedures for weighing the aircraft and the calculation method for establishing the permitted payload range and a comprehensive list of all equipment available are contained in the Maintenance Manual.
  • Page 109 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2cM FLIGHT MANUAL Weight and balance record / Permitted seat load range The following loading chart (page 6.2.3) shows the maximum and minimum load on the seat - with the fuel load in the fuselage already taken into account.
  • Page 110 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2cM FLIGHT MANUAL Altering the minimum seat load by trim ballast weights A trim ballast mounting provision is provided in the fuselage nose forward of the rudder pedal assembly (battery attachment). Optional trim ballast weights (only usable with battery removed) The ballast mounting provision holds up to three (3) lead plates with a weight of 2.2 kg (5.0 lb) each and allows a reduction of the placarded minimum seat load...
  • Page 111 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2cM FLIGHT MANUAL WEIGHT AND BALANCE LOG SHEET (power plant installed) (Loading chart) for Ser.-No.: Date of weighing Empty mass 18 m (kg) without usable amount of 15 m fuel Equipment list dated Empty mass c/g...
  • Page 112 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2cM FLIGHT MANUAL WEIGHT AND BALANCE LOG SHEET (power plant removed) (Loading chart) for Ser.-No.: Date of weighing Empty mass 18 m (kg) without usable amount of 15 m fuel Equipment list dated Empty mass c/g...
  • Page 113 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2cM FLIGHT MANUAL WING SPAN – 18 m (59.06 ft) WING SPAN – 15 m (49.21 ft) Water ballast load Water ballast load Maximum all-up mass including water ballast: 565 kg / 1246 lb...
  • Page 114 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2cM Water ballast loads in (optional) fin tank WARNING Water ballast in the fin tank may only be used to compensate the nose-heavy moment of water ballast carried in the wing tanks! The determination of the ballast quantity carried in the fin tank (m ) is done with the aid of the diagram shown on page 6.2.7 resp.
  • Page 115 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2cM FLIGHT MANUAL WING SPAN - 18 m ( 59.06 ft ) IMP US Ltr. IMP US Ltr. Gal. Gal. Gal. Gal. maximum wing water ballast 44.4 53.4 202 38.3 46.0 174 42.9 51.5 195 36.7 44.1 167 38.5 46.2 175...
  • Page 116 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2cM FLIGHT MANUAL WING SPAN - 15 m ( 49.21 ft ) IMP US Ltr. Gal. Gal. maximum wing water ballast 38.3 46.0 174 33.0 39.6 150 27.5 33.0 125 22.0 26.4 100 16.5 19.8 75 11.0 13.2 50...
  • Page 117 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2cM FLIGHT MANUAL Section 7 Description of the aircraft and its systems Introduction Cockpit description Instrument panel Undercarriage Seat and restraint system Static pressure and Pitot pressure system Airbrake system Baggage compartment Water ballast system(s) 7.10 Power plant system 7.11 Fuel system...

  • Page 118: Supplements

    SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2cM FLIGHT MANUAL Introduction This section provides a description of the powered sailplane including the operation of its systems. For details concerning optional systems and equipment refer to section 9 "Supplements”. For further descriptions of components and systems refer to section 1 of the Maintenance Manual.
  • Page 119 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2cM FLIGHT MANUAL Cockpit description B AT 6100 70 RP M(V) TEM (LI T) 0000803 O FF November 2003 Revision -- 7.2.1...
  • Page 120 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2cM FLIGHT MANUAL All instruments and control elements are within easy reach of the pilot Tilt-up instrument panel Two quick-fasteners or screws secure the glare shield to the instrument panel and to its tubular mounting frame.
  • Page 121 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2cM FLIGHT MANUAL All instruments and control elements are within easy reach of the pilot Rudder pedal adjustment Black T-shaped handle on the right at the base of the instrument console. Forward adjustment : Release locking device by pulling the...
  • Page 122 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2cM FLIGHT MANUAL Canopy locking and jettisoning lever Red lever on the canopy frame on the left. Forward position : Canopy locked To open or jettison the canopy, swing lever b a c k (approx. 90°) up to its stop and raise canopy.
  • Page 123 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2cM FLIGHT MANUAL (11) Airbrake lever Blue lever on the left hand side of the cockpit. Forward position : Closed and locked Pulled back approx. 40 mm (1.6 in.) : Unlocked Pulled fully back : Fully extended...
  • Page 124 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2cM FLIGHT MANUAL (15) Seat back (not illustrated) This is horizontally adjustable on the ground (by means of three notches on either side of the seat pan) to match the pilots size: First insert fixed pin on seat back into desired notch, then engage spring-loaded pin on the far side.
  • Page 125 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2cM FLIGHT MANUAL (19) Starter button Red knob on the stick (20) Throttle Pivoting lever on the port side of the cockpit. Fully forward position: Full throttle Fully backward position: Idle (21) Primer Black rubber bulb on the port seat pan mounting flange.
  • Page 126 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2cM FLIGHT MANUAL Instrument panel 6100 70 RPM(V) TEM ( LI T) 0000803 O FF VIII For a description of items No. I - VIII refer to the following pages. A description of the instrumentation is not deemed necessary.
  • Page 127 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2cM FLIGHT MANUAL Power plant control unit Signal for battery voltage and generator function RPM signals (3 LED) Signal for low fuel level in fuselage tank Signal for ignition Signal for propeller not fully extended Signal for prop arresting device applied...
  • Page 128 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2cM FLIGHT MANUAL Description of the power plant control unit Important Note: On activating the ILEC engine control unit, it first performs a self-test – with all signals illuminating and its display reading 8888888. This may also happen during operation if voltage drops temporarily (e.g.
  • Page 129 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2cM FLIGHT MANUAL (07) Signals for propeller extended With prop fully extended, a green light is on. (08) Propeller extension / retraction switch This switch has three (3) operating positions: “UP”: With the key placed in “UP” position, the prop extends.
  • Page 130 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2cM FLIGHT MANUAL (13) Ignition switch “UP”: Ignition is “ON” “DOWN”: Ignition is “OFF” With ignition “ON”, the electrical fuel pump and the water pump are automatically activated. (14) Display The display offers a continuous indication of engine speed (RPM) and coolant liquid temperature (°...
  • Page 131 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2cM FLIGHT MANUAL Pneumatic valve Panel-mounted two-way cock (should a total energy compensation probe be used). T.E. Variometer(s) fed from T.E. Compensation probe STATIC Variometer(s) fed from Static Pressure ports T.E. Variometer(s) fed from T.E. Compensation probe T.E.
  • Page 132 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2cM FLIGHT MANUAL (VII) Emergency switch (activating the electrical spindle drive extending the propeller pylon) In case of a failure of the electrical prop extension/retraction control system, the pylon drive may still be activated with the aid of an emergency switch.
  • Page 133 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2cM FLIGHT MANUAL VIII Fuse console at panel base Circuit breaker - 50A (power plant master switch) Circuit breaker - 7.5A (avionic main switch) 14 15 Circuit breaker - 15A (generator) Circuit breaker - 12A (spindle drive)
  • Page 134 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2cM FLIGHT MANUAL CIRCUIT BREAKER (12 A) Its protects the pylon spindle drive (actuator) which is controlled by the ILEC unit CIRCUIT BREAKER (5 A) This protects the ILEC control unit (without starter motor) CIRCUIT BREAKER (2A)
  • Page 135 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2cM FLIGHT MANUAL Undercarriage The main wheel of the "Ventus - 2cM" is retractable and features a mechanical resp. hydraulic drum brake. Instead of the standard rubber tail skid a pneumatic wheel is available on request.
  • Page 136 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2cM FLIGHT MANUAL Seat and restraint system The seat pan is bolted to mounting flanges provided on either side of the cockpit. A seat back with integrated head rest adjustable in flight for an upright or reclining position, is standard.
  • Page 137 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2cM FLIGHT MANUAL Static pressure and Pitot pressure system Static pressure sources Static pressure ports are on either side of the fuselage tail boom, 0.8 m (31.5 in.) forward of the base of the fin (in the horizontal plane) and 0.15 m (5.9 in.) below the fuselage-to-wing fillet (to be used for airspeed...
  • Page 138 In turn way then oscillate within their travel, causing some rattling and/or banging. This is immediately stopped by further extending the airbrakes. The control of the “Ventus-2cM” is not affected. With airbrakes extended, the indicated stalling speed is higher depending from mass and C.G.
  • Page 139 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2cM FLIGHT MANUAL Baggage compartment Although an enclosed baggage compartment is not provided, soft objects (like jackets etc.) may be deposited on the removable panel (covering the control linkage) behind the main spar stubs – the head rest obstructs the access opening to a large extent.
  • Page 140 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2cM FLIGHT MANUAL Water ballast system(s) Wing tanks A metal rod connects the operating knob in the cockpit to a torsional drive (in the fuselage center) which, on rigging the inbd. wing panels, automatically hooks up to torque tubes actuating the wing tank dump valves.
  • Page 141 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2cM FLIGHT MANUAL Vent hole Vent hole Strainer 15m-outbd. wing panel without water tank WATER BALLAST SYSTEM Water tank filler opening on inboard wing panel with strainer Water tank filler opening on 18m-outboard wing panel with strainer...
  • Page 142 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2cM FLIGHT MANUAL WATER BALLAST SYSTEMS Torque drive for wing tanks dump valves Connection of fin tank dump valve actuating cable Fin tank dump valve Vent holes Filler tube opening Water ballast dump hole Drain hole...
  • Page 143 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2cM FLIGHT MANUAL 7.10 Power plant system Engine and propeller (for a description and relevant data refer to the engine and propeller manual) are accommodated in a special CFRP mounting structure (pylon), which is pivoted to the fuselage steel tube center frame by means of two rubber shock mounts (vibration isolators).
  • Page 144 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2cM FLIGHT MANUAL 7.11 Fuel system A view of the fuel system is given on page 7.11.2 – for a specification of the fuel to be used refer to page 2.4 An additional fuel tank for one or both wing panels may be obtained on request.
  • Page 145 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2cM FLIGHT MANUAL expansion reservoir 0.7 Liter loop routed to upper canopy coaming frame FUEL SYSTEM with optional wing tanks M03 RT 970 *) Parts listed on page 7.11.3 November 2003 Revision -- 7.11.2...
  • Page 146 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2cM FLIGHT MANUAL PARTS LIST - see page 7.11.2 O P T I O N E N 18 1(1) Hose coupling LP-002-0(1)-SL006-23-2 WALTHER 17 1(1) Hose coupling SP-006-0(2)-SL-006-11 WALTHER 16 1(1) Retainer HM3-10.281B/1 15 1(1) Relief valve...
  • Page 147 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2cM FLIGHT MANUAL 7.12 Electrical system Gliding avionics When operated in the plane sailplane configuration, the minimum instrumentation prescribed does not require an electrical power source. Additional equipment is to be wired as shown on page 7.12.2 and must comply with the manufacturer’s instruction of the relevant instrument.
  • Page 148 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2cM FLIGHT MANUAL BATT. battery in fin BATT. AVIONIC BATT. ENGINE antenna cable BATT. AVIONIC Circuit breaker - 6.3A (mounted on battery) Fuse board (description on page 7.3.7) Bus bar (e.G. AMP-Terminal) Main switch Power plant Main switch Avionic BATT.
  • Page 149 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2cM FLIGHT MANUAL Version - 2 Batteries Version - 3 Batteries Version - 4 Batteries Battery installation in accordance with position of CG Battery installation in accordance with position of CG Battery installation in accordance with position of CG...
  • Page 150 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2cM FLIGHT MANUAL Parts list for pages 7.12.2 and 7.12.3 Teil Stück Benennung Artikel- / Zeichnungs-Nr. Hersteller / Lieferant Lead-Gel-Battery (Engine) 12V / 7.2Ah Panasonic or similar Lead-Gel-Battery (Engine) 12V / 16-18Ah Hawker Energy or sim.
  • Page 151 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2cM FLIGHT MANUAL BATT. engine compartment ENGINE BATT. Batterie 12V / 2 x 7.2Ah or 1 x 28Ah in Fuel level transmitter ENGINE fuselage nose or 1 x 16-18Ah at panel base Rectifier regulator Fuse board (see page 7.3.7)
  • Page 152 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2cM FLIGHT MANUAL 7.13 Miscellaneous equipment Removable ballast (option) (only usable with battery removed) A mounting provision for removable ballast (trim ballast weights) is provided in the fuselage nose forward of the rudder pedal assembly. The trim ballast weights (lead plates) are attached to the FRP-frame by means of a wing bolt.
  • Page 153 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2cM FLIGHT MANUAL ELT-installation The Installation of an Emergency Locator Transmitter is possible in the following places and must comply with the relevant instructions provided by Schempp-Hirth: • on a panel covering the main spar stubs A list of ELTs, currently approved by the LBA is found in the Maintenance Manual.
  • Page 154 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2cM FLIGHT MANUAL Section 8 Handling, care and maintenance Introduction Inspection periods Alterations or repairs Ground handling / road transport Cleaning and care November 2003 Revision -- 8.1.1...
  • Page 155 Introduction This section contains manufacturer's recommended procedures for proper ground handling and servicing of the “Ventus-2cM”. It also identifies certain inspection and maintenance requirements which must be followed if the powered sailplane is to retain that “new plane” performance and dependability.
  • Page 156 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2cM FLIGHT MANUAL 8.2.1 Inspection periods For details concerning the maintenance of this powered sailplane refer to its Maintenance Manual. Airframe maintenance Under normal operating conditions no airframe maintenance work is required between the annual surveys, except for the routine greasing of the spigots and ball bearings of the wing and tailplane attachment fittings.
  • Page 157 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2cM FLIGHT MANUAL Power plant maintenance Propeller Maintenance work on the propeller is to be conducted after every 25 hours of engine time and must comply with the instructions given in the propeller manual. Engine Maintenance work on the engine is required after every 25 hours of engine time or at least once every year and must comply with the instructions given in the engine manual.
  • Page 158 – being repaired on site. A definition of such damage is included in the “REPAIR INSTRUCTIONS” which are found in the appendix to the “Ventus-2cM” Maintenance Manual. Major repairs may only be conducted by a certified repair station having an appropriate authorization.
  • Page 159 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2cM FLIGHT MANUAL Ground handling / road transport a) Towing/pushing When towing the powered sailplane behind a car. a tail dolly should always be used to avoid unnecessary tailplane vibration on the fittings especially in tight turns. When pushing the aircraft by hand, it should not be pushed at its wing tips, but as near to the fuselage as possible.
  • Page 160 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2cM FLIGHT MANUAL Cleaning and care Although the surface coating of a composite aircraft is robust and resistant, always take care of a perfect surface. For cleaning and caring the following is recommended: • Clean the surface (especially the leading edge of wing panels, horizontal stabilizer and fin) with clear water, a sponge and a chamois leather.
  • Page 161 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2cM FLIGHT MANUAL • The canopy should be cleaned with a plexiglass cleaner (e.g. "Mirror Glaze", "Plexiklar" or similar) and only if necessary, with warm water. The canopy should be wiped down only with a soft clean chamois leather or a very soft material as used for gloves.
  • Page 162 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2cM FLIGHT MANUAL Section 9 Supplements Introduction List of inserted supplements November 2003 Revision -- 9.1.1...
  • Page 163 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2cM FLIGHT MANUAL Introduction This section contains the appropriate supplements necessary to safely and efficiently operate the “Ventus-2cM” when equipped with various optional systems and equipment not provided with the standard aircraft. November 2003 Revision -- 9.1.2...
  • Page 164 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2cM FLIGHT MANUAL List of inserted supplements Date Section Title of inserted supplement November 2003 Revision --...