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Flugzeugbau Ventus-2C 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 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 Sailplane
V e n t u s – 2c
Ventus-2c(x)
(S/N 82 and on when in compliance with MB-No. 349-46)
N o v e m b e r 2 0 0 3
(Signature)
(Authority)
(Stamp)
(Original date of approval)

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  • Page 1 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK FLIGHT MANUAL for Sailplane V e n t u s – 2c Model: Type sales name: Ventus-2c(x) (S/N 82 and on when in compliance with MB-No. 349-46) 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-2c 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-2c 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-2c 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-2c 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-2c 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 4.2.1 November 2003 LBA-anerk.
  • Page 7 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2c 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 5.2.1 November 2003 LBA-anerk.
  • Page 8 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2c 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-2c 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 November 2003 November 2003 November 2003 8.5.1...

  • Page 10: Table Of Contents

    SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2c 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-2c 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-2c 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 sailplane. 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-2c FLIGHT MANUAL Certification basis This sailplane, model designation „Ventus-2c“ 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-2c 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-2c FLIGHT MANUAL Descriptive data The “Ventus-2c” is a flap equipped, single-seat high performance sailplane, 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 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2c FLIGHT MANUAL Intentionally blank November 2003 Revision -- 1.4.2...
  • Page 18 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2c 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-2c 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-2c FLIGHT MANUAL Section 2 Limitations Introduction Airspeed Airspeed indicator markings (reserved) (reserved) Weights (masses) Center of gravity Approved maneuvers Maneuvering load factors 2.10 Flight crew 2.11 Kinds of operation 2.12 Minimum equipment 2.13 Aerotow and winch launch 2.14 Other limitations...
  • Page 21 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2c 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-2c 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-2c 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 24 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2c FLIGHT MANUAL Intentionally blank November 2003 LBA-app. Revision --...
  • Page 25 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2c FLIGHT MANUAL Intentionally blank November 2003 LBA-app. Revision --...
  • Page 26 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2c FLIGHT MANUAL Weights (masses) Wing span: 15 m 18 m Maximum permitted take-off mass: 525 kg 600 kg 1157 lb 1323 lb Maximum permitted landing mass: 525 kg 600 kg 1157 lb 1323 lb Maximum permitted take-off...
  • Page 27 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2c 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 28 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2c FLIGHT MANUAL Approved maneuvers The sailplane model „Ventus-2c “ is certified in category U T I L I T Y Warning: Aerobatic maneuvers n o t a p p r o v e d November 2003 LBA-app.
  • Page 29 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2c 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 30 Ventus-2c FLIGHT MANUAL 2.10 Flight crew The “Ventus-2c ” 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 31 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2c FLIGHT MANUAL 2.11 Kinds of operation With the prescribed minimum equipment installed (see page 2.12), this sailplane is approved for 1. VFR-flying in daytime 2. Cloud flying without water ballast for maximum masses: wing span 18 m:...
  • Page 32 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2c 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 33 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2c FLIGHT MANUAL 2.13 Aerotow and winch launch Aerotow - only permissible with nose tow release in place - Maximum towing speed: 180 km/h (97 kt, 112 mph) Weak link in tow rope: max. 765 daN (max. 1687 lb)
  • Page 34 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2c FLIGHT MANUAL 2.14 Other limitations N o n e November 2003 LBA-app. Revision -- 2.14...
  • Page 35 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2c FLIGHT MANUAL 2.15 Limitation placards MAXIMUM PERMITTED ALL-UP MASS Max. permitted speed Altitude (IAS) For 18 m span 1323 lb / 600 kg [ft] km/h For 15 m span 1157 lb / 525 kg MAXIMUM PERMITTED SPEEDS (IAS): km/h...
  • Page 36 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2c FLIGHT MANUAL Section 3 Emergency procedures Introduction Canopy jettisoning Bailing out Stall recovery Spin recovery Spiral dive recovery (reserved) (reserved) Other emergencies November 2003 Revision -- 3.1.1...

  • Page 37: Emergency Procedures (An Approved Section)

    SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2c 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 38 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2c 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 39 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2c FLIGHT MANUAL Bailing out For bailing out the canopy is jettisoned. With the canopy gone (see section 3.2), the pilot may bail out as follows: Actuate release buckle of restraint system Bend upper part of body slightly forward...
  • Page 40 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2c FLIGHT MANUAL Stall recovery 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 41 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2c 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 42 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2c 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 43 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2c FLIGHT MANUAL Intentionally blank November 2003 LBA-app. Revision --...
  • Page 44 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2c FLIGHT MANUAL Intentionally blank November 2003 LBA-app. Revision --...
  • Page 45 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2c 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 46 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2c 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 47 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2c FLIGHT MANUAL Section 4 Normal operating procedures Introduction Rigging and de-rigging Daily inspection Pre-flight inspection Normal procedures and recommended speeds 4.5.1 Methods of launching 4.5.2 (reserved) 4.5.3 Flight 4.5.4 Approach 4.5.5 Landing 4.5.6 Flight with water ballast 4.5.7...

  • Page 48: Normal Procedures

    SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2c 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 49 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2c FLIGHT MANUAL Assembly 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 50 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2c 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 51 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2c FLIGHT MANUAL De-rigging Remove sealing tape from wing panels and tailplane. Outboard wing panels Swing up locking lever with the aid of the threaded rigging pin and carefully pull off outbd. panel(s). Horizontal-tailplane Using the rigging pin, pull out front tailplane attachment pin, lift stabilizer leading edge slightly and pull tailplane forwards and off.
  • Page 52 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2c 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 53 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2c FLIGHT MANUAL Check for the presence of foreign objects g) (reserved) h) (reserved) i) Check main wheel tire pressure: 4.0 bar / 58 psi (see placard) Check tow release mechanism(s) for proper condition and function...
  • Page 54 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2c FLIGHT MANUAL Check fuselage for damage, especially on its lower side Check that the STATIC pressure ports for the ASI on the tail boom (0.8 m /2.62 ft forward of the base of the fin) and below the spar stub cut-out are clear Check condition of tail skid or wheel.
  • Page 55 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2c 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 56 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2c 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 57 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2c FLIGHT MANUAL Normal operating procedures and recommended speeds 4.5.1 Methods of launching Aerotow (Only permissible with nose tow release in place) Maximum permitted towing speed: = 180 km/h (97 kt, 112 mph) For aerotow only the nose tow release must be used. hemp and nylon ropes of between 30 and 40 m length (98-131 ft) were tested.
  • Page 58 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2c FLIGHT MANUAL For rearward c/g positions and low all-up masses the 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", “+2”...
  • Page 59 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2c FLIGHT MANUAL Winch launch (Only permissible with c/g tow release in place) Maximum permitted launching speeds = 150 km/h (81 kt, 93 mph) For winch launching only the c/g tow release must be used. Prior to take-off – with flaps to be at setting "+1" – set the elevator trim as follows: •...
  • Page 60 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2c FLIGHT MANUAL CAUTION: Winch launching at the maximum permitted all-up mass of 525 kg (1157 lb) respective 600 kg (1323 lb) should only be done if there is an appropriately powerful winch and a cable in perfect condition available.
  • Page 61 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2c FLIGHT MANUAL Intentionally blank November 2003 LBA-app. Revision -- 4.5.2...
  • Page 62 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2c FLIGHT MANUAL 4.5.3 Flight The sailplane has pleasant flight characteristics and can be flown effort- lessly at all speeds, loading conditions (with or without water ballast), con- figurations 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 63 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2c FLIGHT MANUAL High speed flying 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 64 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2c FLIGHT MANUAL Use of the wing flaps 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 WING SPAN = 18 m...
  • Page 65 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2c FLIGHT MANUAL Low speed flight and stall behaviour In order to become familiar with the 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 banked turn.
  • Page 66 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2c FLIGHT MANUAL Turning flight stalls When stalled during a coordinated 45° banked turn with the c/g at an aft position, the 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 oppo- site rudder and aileron.
  • Page 67 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2c FLIGHT MANUAL 4.5.4 Approach 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 68 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2c 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 69 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2c FLIGHT MANUAL 4.5.5 Landing 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 70 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2c 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 71 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2c 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 72 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2c 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 73 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2c 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 74 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2c 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 75 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2c 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 76 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2c FLIGHT MANUAL NOTE The polyester coating on this 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 77 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2c FLIGHT MANUAL 4.5.8 Flight in rain When flying the 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 78 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2c FLIGHT MANUAL 4.5.9 Aerobatics Aerobatic maneuvers are n o t permitted! November 2003 LBA-app. Revision -- 4.5.9...
  • Page 79 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2c FLIGHT MANUAL Section 5 Performance Introduction LBA-approved data 5.2.1 Airspeed indicator system calibration 5.2.2 Stall speeds 5.2.3 (reserved) 5.2.4 Additional information Additional information – LBA-approval not required 5.3.1 Demonstrated crosswind performance 5.3.2 Flight polar / Range...

  • Page 80: Performance

    SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2c 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 sailplane in good condition and using average piloting techniques.
  • Page 81 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2c 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 flaps set at "-1".
  • Page 82 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2c FLIGHT MANUAL 5.2.2 Stall speeds The following stall speeds (IAS) at various flap settings were determined in straight and level flight: Wing span 15 m 18 m All-up mass 400 kg 525 kg 600 kg 600 kg (approx.)
  • Page 83 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2c FLIGHT MANUAL Intentionally blank November 2003 LBA-app. Revision -- 5.2.3...
  • Page 84 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2c FLIGHT MANUAL 5.2.4 Additional information N o n e November 2003 LBA-app. Revision -- 5.2.4...
  • Page 85 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2c 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 86 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2c FLIGHT MANUAL 5.3.2 Flight polar / Range 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 0.49 Minimum sink rate km/h at a speed of Best L/D approx.
  • Page 87 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2c 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 = 400 kg / 882 lb 295 1.5 394 2.0 SPEED POLAR DIAGRAM 492 2.5 590 3.0...
  • Page 88 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2c 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 89 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2c FLIGHT MANUAL Introduction This section contains the payload range within which the 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 90 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2c 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 91 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2c 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. Optional trim ballast weights 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 92 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2c FLIGHT MANUAL WEIGHT AND BALANCE LOG SHEET (Loading chart) for Ser.-No.: Date of weighing 18 m Empty mass (kg) 15 m Equipment list dated Empty mass c/g position (mm) aft of datum 15 m Max. (kg) *) Seat load (pilot incl.
  • Page 93 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2c FLIGHT MANUAL Intentionally blank November 2003 Revision -- 6.2.4...
  • Page 94 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2c 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: 600 kg / 1323 lb...
  • Page 95 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2c 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 96 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2c 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 97 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2c 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 98 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2c 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 (reserved) 7.11 (reserved)

  • Page 99: Supplements

    SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2c FLIGHT MANUAL Introduction This section provides a description of the 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 100 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2c FLIGHT MANUAL Cockpit description November 2003 Revision -- 7.2.1...
  • Page 101 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2c 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 102 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2c 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 103 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2c 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 104 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2c 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 105 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2c 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 106 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2c FLIGHT MANUAL Instrument panel For a description of items No. I - III refer to page 7.3.2. A description of the instrumentation is not deemed necessary. November 2003 Revision -- 7.3.1...
  • Page 107 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2c FLIGHT MANUAL Main switch Panel mounted “ON/OFF” switch: DOWN (II) Reserved (III) Outside air temperature indicator When carrying water ballast, the outside air temperature (OAT) must not drop below 2° C / 36° F. November 2003 Revision -- 7.3.2...
  • Page 108 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2c FLIGHT MANUAL Undercarriage The main wheel of the "Ventus - 2c" 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 109 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2c 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 110 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2c 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 111 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-2c” is not affected. With airbrakes extended, the indicated stalling speed is higher depending from mass and C.G.
  • Page 112 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2c 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 113 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2c 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 114 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2c 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 115 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2c 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 116 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2c FLIGHT MANUAL Intentionally blank November 2003 Revision -- 7.10...
  • Page 117 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2c FLIGHT MANUAL Intentionally blank November 2003 Revision -- 7.11...
  • Page 118 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2c FLIGHT MANUAL 7.12 Electrical system Gliding avionics The avionic is to be wired as shown on page 7.12.2 through 7.12.4 and must comply with the manufacturer’s instruction of the relevant instrument. Power for the avionics is supplied by one or more batteries located as follows: •...
  • Page 119 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2c FLIGHT MANUAL BATT. battery in fin BATT. AVIONIC BATT. AVIONIC antenna cable to battery BATTERY - MOUNTING POSITIONS to battery in fin BATT. Battery at panel base - 12V / 7 - 7.2Ah AVIONIC BATT.
  • Page 120 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2c 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 121 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2c FLIGHT MANUAL Parts list for pages 7.12.2 and 7.12.3 Teil Stück Benennung Artikel- / Zeichnungs-Nr. Hersteller / Lieferant Lead-Gel-Battery 12V / 7 - 7.2Ah Panasonic or similar 1-2 Lead-Gel-Battery 12V / 7 - 7.2Ah Panasonic or similar Lead-Gel-Battery (2x6V) 12V / 7 - 7.2Ah...
  • Page 122 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2c FLIGHT MANUAL 7.13 Miscellaneous equipment Removable ballast (option) 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 123 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2c 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: • in the region of the fuselage centre frame, next to the wheel housing •...
  • Page 124 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2c 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 125: Introduction

    Introduction This section contains manufacturer's recommended procedures for proper ground handling and servicing of the “Ventus-2c”. It also identifies certain inspection and maintenance requirements which must be followed if the sailplane is to retain that “new plane” performance and depend- ability.

  • Page 126: Inspection Periods

    SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2c FLIGHT MANUAL Inspection periods For details concerning the maintenance of this 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 127: Alterations Or Repairs

    – being repaired on site. A definition of such damage is included in the “REPAIR INSTRUCTIONS” which are found in the appendix to the “Ventus-2c” Maintenance Manual. Major repairs may only be conducted by a certified repair station having an appropriate authorization.

  • Page 128: Ground Handling / Road Transport

    SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2c FLIGHT MANUAL Ground handling / road transport a) Towing/pushing When towing the 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 129: Cleaning And Care

    SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2c 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 130 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2c 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 131 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2c FLIGHT MANUAL Section 9 Supplements Introduction List of inserted supplements November 2003 Revision -- 9.1.1...
  • Page 132 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2c FLIGHT MANUAL Introduction This section contains the appropriate supplements necessary to safely and efficiently operate the “Ventus-2c” when equipped with various optional systems and equipment not provided with the standard aircraft. November 2003 Revision -- 9.1.2...
  • Page 133 SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK Ventus-2c FLIGHT MANUAL List of inserted supplements Date Section Title of inserted supplement November 2003 Revision --...

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