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Rolladen-Schneider LS 8-18 Flight Manual

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DG Flugzeugbau GmbH, Otto-Lilienthal-Weg 2, D-76646 Bruchsal
Tel. +49 (0)7251-3020 100, Fax +49 (0)7251-3020 200
Flight Manual for the
LS 8-18 Sailplane
This Manual should be carried in the sailplane at all times.
Registration: __________
Serial Number: ___________
Owner:
Edition: July 1999
This sailplane is to be operated in compliance with information and limitations contained herein.
In order that the manufacturer can continue to provide essential service information, any change of
ownership should be notified to the manufacturer immediately.
The translation of this manual has received our most careful attention. However, in any case of doubt or
ambiguity, the original German text must be considered authoritative.
Approved as an Operating Instruction according to JAR 22.

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Summary of Contents for Rolladen-Schneider LS 8-18

  • Page 1 DG Flugzeugbau GmbH, Otto-Lilienthal-Weg 2, D-76646 Bruchsal Tel. +49 (0)7251-3020 100, Fax +49 (0)7251-3020 200 Flight Manual for the LS 8-18 Sailplane This Manual should be carried in the sailplane at all times. Registration: __________ Serial Number: ___________ Owner: Edition: July 1999 This sailplane is to be operated in compliance with information and limitations contained herein.
  • Page 2 DG Flugzeugbau GmbH Flight Manual LS 8-18 General 0 Manual Contents 0.1 Log of Revisions Any revision of the present manual, except actual weighing data, must be recorded in the following table and in case of approved Sections endorsed by the responsible airworthiness authority.
  • Page 3 DG Flugzeugbau GmbH Flight Manual LS 8-18 General 0.2 List of Effective Pages Chapter Page Date Chapter Page Date Title page July 1999 4-14 February 2011 July 1999 4-15 July 1999 September 2011 4-16 July 1999 September 2011 4-17 July 1999...

  • Page 4: Table Of Contents

    DG Flugzeugbau GmbH Flight Manual LS 8-18 General 0.3 Table of Contents Section Approval Status 1 General.........................non-approved 2 Limitations........................approved 3 Emergency Procedures ....................approved 4 Normal Procedures ....................approved 5 Performance .....................partly approved 6 Weight and Balance ....................non-approved 7 Description of Systems) ..................non-approved 8 Handling, Servicing and Maintenance ..............non-approved...

  • Page 5: General

    JAR-22 dated 28. October 1985, (Change 5), with the exemption of JAR 22.49(b)(2)(ii), stalling speed with air brakes extended at maximum all-up weight for the 15 m version. The LBA-Type Certificate No. 402 for LS 8-18 was issued on 20. Jan. 2000 . Category of Airworthiness: "Utility".
  • Page 6 General 1.4 Descriptive and Technical Data The LS 8-18 is a single seater sailplane with carbon fibre wing shell, winglets, T-tail, wing and vertical tail fin water ballast systems, retractable and sprung landing gear, and upper wing surface air brakes. The LS8-18 may be operated in 15m or 18m span and winglets in both versions This sailplane has been produced using the latest technology of industrial fibre design (Glass-, Aramid- and Carbon fibres).

  • Page 7: Limitations

    The limitations included in this section and in section 9 have been approved by LBA (Luftfahrt- Bundesamt Braunschweig). The LS 8-18 sailplane has been designed and approved according to JAR 22 requirements. Factors of safety (relation of ultimate loads to permissible maximum loads occurring during operation) are 1.5 only.
  • Page 8 DG Flugzeugbau GmbH Flight Manual LS 8-18 Limitations 2.2 Airspeeds (IAS) Airspeed limitations and their operational significance are shown below: Maximum permissible Speed Remarks Never exceed speed in Do not exceed this speed in any operation calm air and up to an...

  • Page 9: Limitations

    DG Flugzeugbau GmbH Flight Manual LS 8-18 Limitations 2.3 Airspeed indicator colour markings Airspeed indicator markings and their colour- code significance are shown below: Marking (IAS)value or range Significance Green arc 97-190 km/h Normal Operating range. 52-103 Kt. 60-118 mph...

  • Page 10: Mass (Weight)

    DG Flugzeugbau GmbH Flight Manual LS 8-18 Limitations 2.4 Mass (Weight) Maximum take-off mass including water ballast ....525 kg 1157 lbs Maximum mass without water ballast ....412 kg 908 lbs Recommended landing mass ....500 kg 1102 lbs Warning: It is recommended to discharge water ballast before each landing. Pilots are advised against landing with maximum all-up mass.

  • Page 11: Centre Of Gravity Limits

    Minimum Cockpit Load ! Maximum amounts see pages 4-11/12. 2.6 Approved manoeuvres / Category of Airworthiness The LS 8-18 sailplane is certified in the U ("Utility") category according to JAR 22. Aerobatic flight not approved. 2.7 Manoeuvring load factors At 190 km/h, 103Kt., 118 mph..........5.3 g positive to 2.65 g negative At 280 km/h, 151 Kt., 174 mph (Air brakes retracted) ..

  • Page 12: Kinds Of Operation Limits

    DG Flugzeugbau GmbH Flight Manual LS 8-18 Limitations 2.8 Kinds of operation The LS8-18 sailplane is approved for Day-VFR ........Minimum equipment see page 2-7 Use of water ballast limited to non-freezing conditions. Additives to water ballast not approved. Cloud flying only approved without water ballast Applicable only only for countries, which permit cloud flying and when minimum equipment is certified for cloud flying, see inspectors entry in inspection certificate.

  • Page 13: Minimum Equipment List

    DG Flugzeugbau GmbH Flight Manual LS 8-18 Limitations 2.10 Minimum Equipment List • Airspeed Indicator: scale 50-300 km/h (27-162 Kt.; 31-186 mph) Colour marking see page 2-3. Approved types see Master Equipment List in Maintenance Manual. Pressure pick-ups: vertical tail fin pitot and lower forward fuselage side statics.

  • Page 14: Further Limitations

    DG Flugzeugbau GmbH Flight Manual LS 8-18 Limitations 2.12 Further Limitations 2.12.1 Operating Placards for Limitations Rolladen Schneider Flugzeugbau GmbH Type: LS 8-18 Serial No.:_______ M I N I M U M C O C K P I T L O A D:____ kg / lbs...

  • Page 15: Emergency Procedures

    DG Flugzeugbau GmbH Flight Manual LS 8-18 Emergency Procedures 3 Emergency Procedures Contents of Section 3: 3 Emergency procedures................3-1 3.1 Introduction..................... 3-1 3.2 Emergency Canopy Jettison..............3-1 3.3 Emergency Exit..................3-2 3.4 Stall Recovery..................3-2 3.5 Spin Recovery ..................3-3 3.6 Spiral Dive Recovery ................

  • Page 16: Emergency Procedures

    DG Flugzeugbau GmbH Flight Manual LS 8-18 Emergency Procedures 3.3 Emergency Exit Canopy - jettison Seat harness - open Exit - Lift with arms over cockpit rim push yourself away from the sailplane - preferably dive under wing, to avoid the tail 3.4 Stall Recovery...

  • Page 17: Spin Recovery

    DG Flugzeugbau GmbH Flight Manual LS 8-18 Emergency Procedures 3.5 Spin Recovery Simultaneously: Elevator - push forward Rudder - full rudder deflection opposite to spin rotation until rotation stops Aileron - opposite to spin rotation for quicker termination Until rotation stops, then:...

  • Page 18: Other Emergencies

    DG Flugzeugbau GmbH Flight Manual LS 8-18 Emergency Procedures 3.7 Other Emergencies 3.7.1 Limitation of High Speed Flight (a) If there are indications, that the intended air speed will be exceeded, for instance (1) While flying under large cloudbanks (2) During cloud flying in heavy turbulence then: air brakes should be extended carefully in the green arc airspeed indicator range before 190 km/h (103 Kt.;...

  • Page 19: Flight With Asymmetric Water Ballast Loading

    DG Flugzeugbau GmbH Flight Manual LS 8-18 Emergency Procedures 3.7.4 Flight with asymmetric Water Ballast Loading Uneven water dumping may be recognised as follows: with free aileron, one wing tends downward. for straight flight at low speeds considerable aileron deflection is required.

  • Page 20: Emergency Landing In Water

    DG Flugzeugbau GmbH Flight Manual LS 8-18 Emergency Procedures 3.7.8 Emergency Landing on Water During a water landing test with landing gear retracted, the sailplane used submarined completely. As submarining may be possible also with gear extended, the following procedure is...

  • Page 21: Normal Procedures

    DG Flugzeugbau GmbH Flight Manual LS 8-18 Normal Procedures 4 Normal Procedures Contents of Section 4: 4 Normal Procedures ......................4-1 4.1 Introduction ........................4-1 4.2 Rigging and De-rigging ....................4-2 4.3 Daily Inspection ......................4-3 4.4 Pre-flight Check ......................4-5 4.5 Normal Procedures ......................

  • Page 22: Normal Procedures

    DG Flugzeugbau GmbH Flight Manual LS 8-18 Normal Procedures 4.2 Rigging and De-Rigging 1. Before rigging, insert draining plugs into root ribs - grease with Vaseline if necessary – and remove valve opener. 2. Before extending landing gear check for adequate ground clearance.

  • Page 23: Daily Inspection

    DG Flugzeugbau GmbH Flight Manual LS 8-18 Normal Procedures 4.2 Rigging and De-Rigging continued Installation of 15 m (49 ft) or 18 m (59 ft) Winglets 1. Insert winglet until securing nut starts catching thread; when aileron pins at 18 m (59 ft) version are not correctly aligned, installation is impossible.
  • Page 24 DG Flugzeugbau GmbH Flight Manual LS 8-18 Normal Procedures 4.3 Daily Inspection continued 3 Wings (a) Ventilation openings and water drain orifices at root free from clogging (b) Condition, gelcoat- or structural damage, pressure marks, cracks (c) Air brakes for proper function and locking...

  • Page 25: Pre-Flight Check

    DG Flugzeugbau GmbH Flight Manual LS 8-18 Normal Procedures 4.3 Daily Inspection continued 6 Cockpit (a) Canopy cleaned, if required (b) Check canopy locking and emergency jettison function: (1) "Pilot" in seat, both canopy locking levers opened. (2) Helper at front canopy end to avoid lifting of canopy by gas spring, because this would unduly deform the spring of the temporary rear end hinge.

  • Page 26: Cockpit-Checklist

    DG Flugzeugbau GmbH Flight Manual LS 8-18 Normal Procedures 4.5 Normal Procedures 4.5.1 Cockpit-Checklist LS 8-18 Checklist This sailplane must be operated in compliance with operating limitations stated in the form of markings, placards and Flight Manual. Main pins secured ?

  • Page 27: Adjustment Of Backrest

    DG Flugzeugbau GmbH Flight Manual LS 8-18 Normal Procedures 4.5.4 Adjustment of Backrest Warning: Adjust backrest in such way, that lower spine is well supported and not bent and lap belt can be adjusted tight. Two possibilities of adjustment, both can be used on the ground only...

  • Page 28: Trim System

    DG Flugzeugbau GmbH Flight Manual LS 8-18 Normal Procedures 4.5.7 Trim System (a) Trim lever and trim-locking lever are separate (b) Trim-locking lever is at control stick (c) Pull locking lever to free trim knob at left cockpit side (d) With the trim knob:...

  • Page 29: Water Ballast

    DG Flugzeugbau GmbH Flight Manual LS 8-18 Normal Procedures 4.5.10 Water Ballast (a) Use clear water without any additives. (b) For 4” wheel only: Increase tyre pressure to 4 bar < 58 psi>, when using full water ballast. Step (b) does not apply when TN8020 has been executed.

  • Page 30: Wing Tank Loading Procedure

    DG Flugzeugbau GmbH Flight Manual LS 8-18 Normal Procedures 4.5.10.2 Wing Tank Loading Procedure (after filling of tail tank) Always place sailplane horizontal and fill outer tank first. Connect small diameter wing tank adapter to filling funnel, use it to open outer tank valve and brace taper into opening.

  • Page 31: Maximum Wing Water Ballast (Table)

    DG Flugzeugbau GmbH Flight Manual LS 8-18 Normal Procedures 4.5.10.4 Maximum Wing Water Ballast Cockpit Load (Pilot + Empty Mass Parachute + equipment) [kg] [kg] Cockpit Load (Pilot + Empty Mass parachute + equipment) [lbs] [lbs] Warning: Wing water ballast must always be compensated with tail fin water ballast according to tables page 4-12.

  • Page 32: Maximum Tail Fin Water Ballast (Table)

    DG Flugzeugbau GmbH Flight Manual LS 8-18 Normal Procedures 4.5.10.5 Maximum Tail Fin Water Ballast Maximum tail tank capacity: ....- without battery box ..5.5 kg <12 lbs> - with battery box ..3.8 to 4.1 kg <8.4 to 9.0 lbs>...

  • Page 33: Dumping Of Water Ballast

    DG Flugzeugbau GmbH Flight Manual LS 8-18 Normal Procedures 4.5.10.6 Dumping of Water Ballast (a) Single ballast lever forward or both double levers forward = All ballast tanks open. (b) Only small lever of double levers forward = Only inner tank and tail tank open.

  • Page 34: Aero Tow

    DG Flugzeugbau GmbH Flight Manual LS 8-18 Normal Procedures 4.5.12 Aero Tow Aero tow must be performed at the nose hook. Trim slightly nose heavy: Trim position indicator in front of neutral mark. Use wheel brake during tightening of tow cable to avoid rolling over rope.

  • Page 35: High Altitude Flight

    DG Flugzeugbau GmbH Flight Manual LS 8-18 Normal Procedures 4.5.14 High Altitude Flight Increasing altitude yields higher true airspeed than indicated airspeed and this difference increases with increasing altitude. This does not influence loads on the structure, which means that colour markings on airspeed indicator are valid unless limited by red lines.

  • Page 36: Landing

    4.5.18 Flight in the Vicinity of Thunderstorms Warning: Carbon fibre structures have been repeatedly destroyed due to lightning stroke. Therefore avoid flight and especially winch-launch in the vicinity of thunderstorms, as carbon fibres are used in important structures of the LS 8-18 sailplane. Edition: July 1999 LBA-appr.

  • Page 37: Postflight Check

    DG Flugzeugbau GmbH Flight Manual LS 8-18 Normal Procedures 4.6 Postflight Checks 1. Switch off electrical instruments 2. Remove battery and charge, when necessary 3. Remove insects and dust using chamois leather (See also chapter 8, Cleaning and Care) 4. Check if moisture has accumulated in air brake boxes and remove with sponge 5.

  • Page 38: Performance

    DG Flugzeugbau GmbH Flight Manual LS 8-18 Performance 5 Performance Contents of Section 5: 5.1 Introduction......................5-1 5.2 LBA-approved Data................... 5-2 5.2.1 Airspeed Indicator System Calibration ............5-2 5.2.2 Stalling Speeds....................5-2 5.3 Additional Information ..................5-3 5.3.1 Demonstrated Crosswind Performance............5-3 5.3.2 Flight Polar.......................
  • Page 39 DG Flugzeugbau GmbH Flight Manual LS 8-18 Performance 5.2.1 Airspeed Indicator System Calibration continued 5.2.2 Stalling Speeds Stalling speeds (IAS) for straight and level flight: Wing span 15 m <49 ft> 18 m <59 ft> Without water ballast at 384 kg...
  • Page 40 The flight polar gives forward versus sinking speed. It is valid for “clean” wing. Insects and raindrops on wing decrease performance and handling, see also page 4-16, Landing. Polar curves of LS 8-18 with 15 & 18 m wingspan wing loading 33 kg/m² (= without water; 6.76 lbs/ft²) resp.

  • Page 41: Weight And Balance

    DG Flugzeugbau GmbH Flight Manual LS 8-18 Weight and Balance 6 Weight and Balance Contents of Section 6: 6 Weight and Balance..................... 6-1 6.1 Introduction ...................... 6-1 6.2 Weighing Record and Loading Limits ............. 6-1 and 6-2 6.1 Introduction This section gives details about permissible Cockpit Loading and approved mass limitations of this sailplane.
  • Page 42 DG Flugzeugbau GmbH Flight Manual LS 8-18 Weight and Balance 6.2 Cockpit Loading Plan (Pilot and Parachute) continued Warning: New entry with each new weighing or when changing equipment. Entry should be calculated in accordance with chapter 2 of Maintenance Manual. State dimensions used.

  • Page 43: Description Of Systems

    DG Flugzeugbau GmbH Flight Manual LS 8-18 Description of Systems 7 Description of Systems Contents of Section 7: 7 Systems........................ 7-1 7.1 Introduction ...................... 7-1 7.2 Cockpit Controls....................7-2 7.3 Air Brake System .................... 7-3 7.4 Baggage Compartment ..................7-3 7.5 Water Ballast System and Operation..............

  • Page 44: Cockpit Controls

    DG Flugzeugbau GmbH Flight Manual LS 8-18 Description of Systems 7.2 Cockpit Controls Numbers refer to placards, see also Flight Manual, pages 2-13 and Maintenance Manual pages 10-1 and 10-2. A - Left canopy locking B - Right canopy locking and...

  • Page 45: Air Brake System

    DG Flugzeugbau GmbH Flight Manual LS 8-18 Description of Systems 7.3 Air Brake System Friction brake 7.4 Baggage Compartment Baggage Compartment is accessible only on the ground after swivelling backrest forward. Loading possible after rigging. Equipment (for instance batteries) must be installed according to instructions in Maintenance Manual, chapter 11.

  • Page 46: Wing Water Ballast System

    DG Flugzeugbau GmbH Flight Manual LS 8-18 Description of Systems 7.5.1 Wing Water Ballast System Valve of inner tank Draining tube of outer tank Ventilation tube of inner tank Draining valve for both tanks Valve of outer tank Drive lever...

  • Page 47: Electrical System And Operation

    DG Flugzeugbau GmbH Flight Manual LS 8-18 Description of Systems 7.6 Electrical System and Operation For electrical system principle see wiring diagram below. Power supply by 12V battery with a minimum capacity of 5.7 Ah. In case of two batteries, a three position switch may be used as main switch. A current limiting device must be used for each electrical user (microfuses or circuitbreakers).

  • Page 48: Various Equipment

    DG Flugzeugbau GmbH Flight Manual LS 8-18 Description of Systems 7.8 Various Equipment 7.8.1 Expendable Ballast (Trim Weights) Expendable ballast to compensate pilot weight below Minimum Cockpit Load, may be fitted in front of rudder pedals and secured with knurled nut.

  • Page 49: Handling, Servicing And Maintenance

    DG Flugzeugbau GmbH Flight Manual LS 8-18 Handling, Servicing, Maintenance 8 Handling / Servicing / Maintenance Contents of Section 8: 8 Handling / Servicing / Maintenance ................. 8-1 8.1 Introduction ......................8-1 8.2 Sailplane Inspection Periods.................. 8-2 8.3 Preventive Maintenance (USA only)..............8-2 8.3.1 A1terations or Repairs..................
  • Page 50 When in doubt, weather a “small repair” or a “major repair” is necessary, contact the manufacturer. • “Major repairs” must be accomplished at national authority-certified repair stations rated for composite aircraft structure work in accordance with Rolladen-Schneider repair methods. Warning: During “major repairs” and “major modifications” airworthiness may be lost due to unqualified work.
  • Page 51 DG Flugzeugbau GmbH Flight Manual LS 8-18 Handling, Servicing, Maintenance 8.3.1 Alterations or Repairs continued Longitudinal Motion Pushrod Bearings Important Note: Longitudinal motion pushrod bearings should never be greased or oiled! Longitudinal motion pushrod bearings are being used throughout the wing control system, in the fuselage for elevator-, aileron- and landing gear drive systems.
  • Page 52 DG Flugzeugbau GmbH Flight Manual LS 8-18 Handling, Servicing, Maintenance 8.4 Ground Handling / Road Transport continued Supporting Area to lift whole Sailplane 1. Under wing spar near fuselage, never under nose section 2. Under fuselage shell in front of wing (main bulkhead) 3.
  • Page 53 DG Flugzeugbau GmbH Flight Manual LS 8-18 Handling, Servicing, Maintenance 8.5 Cleaning and Care Important Warning: Unless regularly polished with hard wax after each cleaning, sanded gelcoat shows distinctive weathering marks due to changes of temperature, ultra violet radiation and humidity (Wax at least twice a year!).
  • Page 54 DG Flugzeugbau GmbH Flight Manual LS 8-18 Handling, Servicing, Maintenance 8.5 Cleaning and Care continued Pins, Bushes and Control System Connectors Due to required tolerances not all these items can be protected against corrosion. Therefore cover regularly with non-corrosive grease.

  • Page 55: Supplements

    DG Flugzeugbau GmbH Flight Manual LS 8-18 Supplements 9 Supplements Contents of Section 9: 9 Supplements......................9-1 9.1 Introduction......................9-1 9.2 List of Supplements included................9-1 9.1 Introduction This section contains the appropriate supplements necessary to safely and efficiently operate the sailplane when equipped with various optional systems and equipment not provided with the standard sailplane.

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