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DG Flugzeugbau DG-800A Flight Manual

Motorglider
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Download this manual See also: Maintenance Manual
DG Flugzeugbau GmbH
Otto-Lilienthal-Weg 2 / Am Flugplatz  D-76646 Bruchsal  Germany
Postbox 1480, D-76604 Bruchsal  Germany
Tel. 07251/3020-100  Telefax 07251/3020-200  eMail: dg@dg-flugzeugbau.de
Spare part and material sales: Tel. 07251/3020-270  lager@dg-flugzeugbau.de
www.dg-flugzeugbau.de
Type
:
Model
:
Data Sheet No.: EASA.A.067
Factory Serial No.:
Registration No.:
Date of Issue:
Pages as indicated by "EASA App." are approved by:
(Signature)
(Authority)
(Stamp)
Date of approval
This motorglider is to be operated in compliance with information and
limitations contained herein.
F L I G H T M A N U A L
F O R T H E
M O T O R G L I D E R
DG-808C
DG-800A
DG-808C
__________________________
__________________________
June 2005
January 10. 2006

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  • Page 1 DG Flugzeugbau GmbH Otto-Lilienthal-Weg 2 / Am Flugplatz  D-76646 Bruchsal  Germany Postbox 1480, D-76604 Bruchsal  Germany Tel. 07251/3020-100  Telefax 07251/3020-200  eMail: dg@dg-flugzeugbau.de Spare part and material sales: Tel. 07251/3020-270  lager@dg-flugzeugbau.de www.dg-flugzeugbau.de F L I G H T M A N U A L...
  • Page 2 Flight manual DG-808C Warnings All sailplanes, especially those with retractable powerplants, are very complex technical devices. If you don’t use yours as it is intended and within the certified operating limitations or if you fail to carry out proper maintenance work, it may harm your health or place your life in danger.
  • Page 3 Flight manual DG-808C 0 Revisions 0.1 Record 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. The new or amended text in the revised page will be indicated by a black vertical line in the right hand margin, and the under lying document for the Revision and the date will be shown on the bottom of the page.
  • Page 4 Flight manual DG-808C This page is intentionally left blank. Issued: June 2005...
  • Page 5 Flight manual DG-808C 0.2 List of effective pages Section page issued replaced/ replaced/ June 2005 July 2017 see manual amendments " " " " June 2005 June 2005 " May 2012 " " " Sept 2007 May 2012 " Sept 2007 App.
  • Page 6 Flight manual DG-808C List of effective pages (cont.) Section Page issued replaced/ replaced/ App. June 2005 May 2012 " May 2012 " May 2012 " " " " May 2012 " " May 2012 July 2017 " 4.10 " July 2017 "...
  • Page 7 Flight manual DG-808C List of effective pages (cont.) Section Page issued replaced/ replaced/ June 2005 " May 2012 " " May 2012 " " Sept 2007 " May 2012 " " 6.10 " Sept 2007 May 2012 June 2005 May 2012 "...
  • Page 8 Flight manual DG-808C List of effective pages (cont.) Section page issued replaced/ replaced/ June 2005 " " " May 2015 " 0.3 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) Mass (weight) and balance (a non-approved section) Sailplane and systems description (a non-approved section)

  • Page 9: Table Of Contents

    Flight manual DG-808C 1 General Section Page Introduction ....................1.2 Certification basis ..................1.2 Warnings, cautions and notes ..............1.3 Descriptive data ..................1.4 Three view drawing ................. 1.6 Issued: June 2005...

  • Page 10: Introduction

    Flight manual DG-808C 1.1 Introduction The flight manual has been prepared to provide pilots and instructors with information for the safe and efficient operation of the DG-808C motorglider. This manual includes the material required to be furnished to the pilot by JAR Part 22.

  • Page 11: Warnings, Cautions And Notes

    Flight manual DG-808C 1.3 Warnings, cautions and notes The following definitions apply to warnings, cautions and notes used in the flight manual. "Warning" means that the non observation of the corresponding procedure leads to an immediate or important degradation of the flight safety. "Caution"...

  • Page 12: Descriptive Data

    Flight manual DG-808C 1.4 Descriptive data The DG-808C is a singleseater high performance self-launching motorglider with retractable powerplant. Technical details  2-piece wing or 4 piece wing with parting at y = 7.25 m (Option).  Wing tips with Winglets for 15 m span (Option) ...
  • Page 13 Flight manual DG-808C Technical data Wingspan m (feet) 15 (49.2) 18 (59.1) Wing surface m² (ft²) 10.68 (115.0) 11.81 (127.1) Aspect ratio 21.07 27.42 Mean aerodynamic chord MAC m (ft) 0.734 (2.41) 0.700 (2.30) Length m (ft) 7.055 (23.15) Fuselage width m (ft) 0.63 (2.07) Fuselage height...

  • Page 14: Three View Drawing

    Flight manual DG-808C 1.5 Three view drawing (dimensions in mm) Issued: September 2007 TN 800/34...
  • Page 15 Flight manual DG-808C 2 Limitations Section Page Introduction ....................2.2 Airspeed ....................2.3 Airspeed Indicator Markings ..............2.4 Power plant ....................2.5 Power plant instrument markings ............2.5 Fuel ......................2.6 Mass (weight) ................... 2.7 Centre of gravity ..................2.7 Approved manoeuvres ................

  • Page 16: Introduction

    Flight manual DG-808C 2.1 Introduction Section 2 includes operating limitations, instrument markings and basic placards necessary for safe operation of the glider, its standard systems and standard equipment. The limitations included in this section have been approved by the EASA. EASA app.

  • Page 17: Airspeed

    Flight manual DG-808C 2.2 Airspeed Airspeed limitations and their operational significance are shown below Speed Remarks km/h (kts.) VNE Never exceed 270 (146) Do not exceed this speed in any speed operation and do not use more than 1/3 of control deflection. Max.

  • Page 18: Airspeed Indicator Markings

    Flight manual DG-808C 2.3 Airspeed Indicator Markings Airspeed indicator markings and their colour code significance are shown below. Marking (IAS) value or Significance range km/h (kts) White Arc 88 -190 Positive Flap Operating (47.5 - 103) Range (lower limit is maximum weight 1.1 VSO in landing configuration.

  • Page 19: Power Plant

    Flight manual DG-808C 2.4 Power plant Engine manufacturer: Solo Kleinmotoren Sindelfingen/Maichingen Germany Engine model: Solo 2 625 01 2 cylinder liquid cooled two stroke engine with dual ignition Maximum power: Take off: 39 kW (53 hp) continuous: 39 kW (53 hp) Max.

  • Page 20: Fuel

    Flight manual DG-808C Coolant temperature indicator (CHT): On right hand upper side of the DEI-NT display, digital indication with 3 digits, limitation data printed above display: 95°C When exceeding this temperature a full screen warning “CHT overTemp” appears. When this warning has been confirmed (by pushing the selector knob at the right hand side of the display) the CHT display will keep blinking as long as the CHT is above the max.

  • Page 21: Mass (Weight)

    Flight manual DG-808C 2.7 Mass (weight) Maximum take-off and landing mass with waterballast Version DG-808C Classic Competiton wingspan 15 m 525 kg (1157 lbs.) 540 kg ( 1190 lbs.) wingspan 18 m 525 kg (1157 lb). 600 kg ( 1323 lbs.) Maximum take-off and landing mass without waterballast: Maximum take-off and landing mass = W wings...

  • Page 22: Approved Manoeuvres

    Flight manual DG-808C 2.9 Approved manoeuvres This sailplane is certified for normal gliding in the "Utility" category. Simple aerobatics are approved but only without waterballast and with engine retracted. The following aerobatic manoeuvres are approved (see section 4.5.12): Wingflap setting 0° for all manoevres. Manoeuvre recommended entry speed IAS...

  • Page 23: Kinds Of Operation

    Flight manual DG-808C 2.12 Kinds of operation A) All configurations Flights according to VFR (daylight) Aerotow Winch- and auto-launching B) In addition when flying without waterballast and with engine retracted 1. Cloud flying (daylight): permitted when properly instrumented (see section 2.13 b). 2.

  • Page 24: Aerotow, Winch And Autotow Launching

    Flight manual DG-808C 2.14 Aerotow, winch and autotow launching 2.14.1 Weak links in towing cables Version Classic and Version Competition up to TOW 525kg Aerotow, winch and autotow launching recommended: 6000 N + 10% (1320 lbs. + 10%) max.: 6600 N (1455 lbs.) Version Competition up to TOW 600kg Aerotow and autotow launching recommended: 6000 N + 10% (1320 lbs.

  • Page 25: Waterballast

    Flight manual DG-808C 2.17 Waterballast 2.17.1 Wing ballast Warning: Filling the water ballast is only allowed with a filling system which enables determination of the exact amount of ballast filled, e.g. water gauge or calibrated canisters. Only symmetrical loading is allowed. After filling, balance the wings by dumping enough water from the heavy wing.

  • Page 26: Limitations Placards

    Flight manual DG-808C 2.19 Limitations placards Version DG-808C Classic DG Flugzeugbau GmbH type: DG 808C Classic serial no: 8- Other cockpit placards year of construction: Maximum airspeeds km/h kts. see section 7 Winch launch Aero-tow Manoeuvering V Rough air Max. flap extended speed +8° +5°...
  • Page 27 Flight manual DG-808C 2.20 Limitations placards Version DG-808CCompetition DG Flugzeugbau GmbH type: DG 808C Competition serial no: 8- Other cockpit placards year of construction: Maximum airspeeds km/h kts. see section 7 Winch launch Aero-tow Manoeuvering V Rough air Max. flap extended speed +8° +5°...

  • Page 28: Other Limitations

    Flight manual DG-808C 2.21 Other limitations 2.21.1 Approach and landing Landing with the engine extended and running is prohibited, except in an emergency. Always land in the gliding configuration, engine retracted. EASA app. Issued: June 2005 2.14...
  • Page 29 Flight manual DG-808C 3 Emergency procedures Page Section Introduction ....................3.2 Canopy jettison..................3.2 Bailing out ....................3.2 Stall recovery ................... 3.2 Spin Recovery ..................3.2 Spiral dive recovery ................. 3.3 Recovery from unintentional cloud flying ..........3.3 Engine failure ................... 3.3 3.8.1 Power loss during take off ...............

  • Page 30: Introduction

    Flight manual DG-808C 3.1 Introduction Section 3 provides amplified procedures for coping with emergencies that may occur. Emergency situations can be minimized by proper pre-flight inspections and maintenance. Caution: Canopy jettison and bailing out should be practised several times on the ground before flying the aircraft.

  • Page 31: Spiral Dive Recovery

    Flight manual DG-808C Caution: To prevent unintentional spinning do not stall the sailplane. Fly with enough speed reserve especially in gusty conditions and in the landing pattern. Intentional spins with waterballast are not permitted. Height loss during recovery without waterballast with full waterballast up to m 150 m 220 up to ft 500...

  • Page 32: Power Loss During Flight

    Flight manual DG-808C 3.8.2 Power loss during flight Push the control stick forward immediately, watch the airspeed indicator! Check: - fuel cock position? - fuel quantity? If no change, retract the engine or land with extended engine. 3.9 Fires 3.9.1 In engine on the ground - close fuel cock and switch off ignition if the engine is still running - keep engine extended...

  • Page 33: Defective Exhaust System

    Flight manual DG-808C 3.10 Defective exhaust system With a defective exhaust system inside the engine bay partial overheating of the engine bay walls is likely. First the fire resistant paint will swell and protect the structure for a few minutes. With longer operation the structure will be damaged.

  • Page 34: Retraction Or Extension Of The Power Plant With The Normal Mechanism Not Working

    Flight manual DG-808C 3.13 Retraction or extension of the power plant with the normal mechanism not working Extend or retract the power plant via the manual switch on the instrument panel. This procedure is only to be followed in an emergency as all safety devices (e.g. against retraction of the engine while running) are by-passed.

  • Page 35: Emergency Wheel Up Landing

    Flight manual DG-808C 3.17 Emergency wheel up landing It is not recommended to execute a wheel up emergency landing, as the energy absorption capability of the fuselage is much smaller than that of the landing gear. If the landing gear can't be extended touch down with small angle of attack. 3.18 Emergency ground loop If there is the risk of overshooting the landing strip you have to decide at least 40 m (130 ft) before the end of the field to execute a controlled ground loop:...

  • Page 36: Normal Procedures

    Flight manual DG-808C 4 Normal procedures Section Page Introduction ....................4.2 Rigging and derigging, filling the watertanks, refuelling ......4.2 Daily Inspection ..................4.7 Pre-flight inspection ................4.11 Normal procedures and recommended speeds ........4.12 4.5.1 Engine starting, taxiing procedures ............4.12 4.5.2 Self launching, take-off and climb ............

  • Page 37: Section 4.1 Introduction

    Flight manual DG-808C 4.1 Introduction This section provides checklists and amplification procedures for the conduct of normal operation. Normal procedures associated with optional systems can be found in section 9. 4.2 Rigging and derigging, filling the watertanks, refuelling 4.2.1 Rigging 1.
  • Page 38 Flight manual DG-808C 4.2.2 Filling the water ballast tanks Warning: Filling the water ballast is only allowed with a filling system which enables determination of the exact amount of ballast poured in, e.g. water gauge or calibrated canisters. Fill with clean water. Only symmetrical loading is allowed.
  • Page 39 Flight manual DG-808C Fill with clean water using a graduated measuring vessel. In addition you may check the content level by holding the filling hose against the scale on the fin. After filling, push the fin tank dump handle in forward direction (the dump valve will be closed by a spring).
  • Page 40 Flight manual DG-808C The calibration will be confirmed by the DEI-NT by a beep with approx. 1 second duration. At least each time you change the fuel type or quality you have to fill the tank completely to do a calibration to ensure a correct fuel quantity indication.
  • Page 41 Flight manual DG-808C 4.2.4 Derigging Derigging follows the reverse of rigging. Waterballast must be dumped first. Transfer the fuel from the wing tanks (Option) to the fuselage tank or empty the wing tanks using the electric pump system in reverse. Disconnect the connectors from the wing fuel tanks.

  • Page 42: Daily Inspection

    Flight manual DG-808C 4.3 Daily Inspection Please bear in mind the importance of the inspection after rigging the glider and respectively each day prior to the first take off. It is for your safety. Caution: After a heavy landing or if your sailplane has been subjected to other high loads you must execute a complete inspection referring to maintenance manual section 2.3 prior to the next take off.
  • Page 43 Flight manual DG-808C Inspection after rigging - Walk around the aircraft All parts of the airframe: Check for flaws such as bubbles, holes, bumps and cracks in the surface; Check leading and trailing edges of the wings and control surfaces for cracks; Cockpit area:- Check the canopy locking mechanism;...
  • Page 44 Flight manual DG-808C 3. C.G. Tow hook:- a) Check the ring muzzle of the C.G. hook for wear and function; b) Check both tow hooks (if installed) for cleanliness and corrosion; 4. Main landing gear:- a) Check the struts, the gear box, the gear doors and the tyre for wear; dirt in the struts can hinder the landing gear from locking over centre the next time!;...

  • Page 45: Issued: July

    Flight manual DG-808C l) visual check of the propeller; m) turn the propeller 1 revolution by hand and listen for abnormal sounds which may indicate engine damage; n) drain condensed water from the fuel tank. The drainer is located in the main wheel box on the rear wall on the right hand side;...

  • Page 46: Pre-Flight Inspection

    Flight manual DG-808C 4.4 Pre-flight inspection 1. Lead ballast (for under weight pilot)? 2. Fin ballast tank emptied or correct amount filled in? (only with Version DG-808C Competition) 3. Parachute worn properly? 4. Safety harness buckled? 5. Seat back and pedals adjusted? 6.

  • Page 47: Normal Procedures And Recommended Speeds

    Flight manual DG-808C 4.5 Normal procedures and recommended speeds 4.5.1 Engine starting, taxiing procedures 4.5.1.1 Engine starting on the ground a) Check if the fuel cock is open. b) Master switch on. c) Extend the powerplant: there are two methods: 1.
  • Page 48 Flight manual DG-808C k) Adjust the engine RPM to approx. 3000 and check the ignition circuits (magnetos), but not before the engine runs smoothly. A max. drop of 300 RPM is permissible. n) Check full engine RPM (wheel brake locked on, a helper should lift the fuselage nose), min.
  • Page 49 Flight manual DG-808C c) Approx. ¼ hour after retraction of the hot engine vapour bubbles may start forming in the carburettor which makes engine start difficult. In most cases the engine will start but refuse to accept throttle and may stop again.

  • Page 50: Self Launching, Take-Off And Climb

    Flight manual DG-808C 4.5.2 Self launching, take-off and climb 4.5.2.1 Take-off distance Prior to take-off check according to section 5.2.3 if the available runway length is sufficient. It must be appreciated that a rising runway, wet or uneven surface, long grass, cross wind etc.

  • Page 51: Launch

    Flight manual DG-808C 4.5.3 Tow launch Due to the towhook position being in the middle of the fuselage and the excellent effectiveness of the ailerons and rudder, the possibility of wing dropping or ground loops, even on a slowly accelerating aerotow is reduced. Take-off with strong crosswind is possible.
  • Page 52 Flight manual DG-808C 4.5.3.2 Winch launch Winch launch is only allowed using the C.G. tow hook! Set the wing flaps to +8°. Set the trim nose down for a winch launch. Use the normal winch launch procedure. After reaching 60 m (200 ft) gradually pull back on the stick so that the glider will not pick up excessive speed.

  • Page 53: Free Flight

    Flight manual DG-808C 4.5.4 Free flight Stalling characteristics (level and turning flight) When stalled with flap setting neutral or negative the DG-808C will continue to fly level. If the stick should be pulled further the DG-808C will drop the nose or one wing.

  • Page 54: Cruise Engine On And Utilisation Of The Wing Fuel Tanks

    Flight manual DG-808C 4.5.5 Cruise engine on and utilisation of the wing fuel tanks 4.5.5.1 General The engine of the DG-808C is not designed for continuous cruise with the engine. Due to the high drag of the extended powerplant and as the propeller is designed for optimum take-off performance, cruise with higher speed is not efficient.

  • Page 55: Engine Stop Retraction And Extension - Start In Flight And After Landing

    Flight manual DG-808C 4.5.6 Engine stop retraction and extension – start in flight and after landing 4.5.6.1 Stopping and retracting the engine in flight 1. Lift the rear view mirror so that you see the propeller. 2. Fly at 85-90 km/h (46-49 kts). 3.
  • Page 56 Flight manual DG-808C 4.5.6.2 Extension and starting the engine in flight 1. With the engine extended but not running the rate of sink at 90 km/h (49 kts) increases to 2 m/sec. (395 ft/min.). Therefore restarting the engine should only be done over landable terrain and not below 400 m (1320 ft) above ground.

  • Page 57: Approach And Landing

    Flight manual DG-808C 4.5.7 Approach and landing Note: Always land in the gliding configuration, engine retracted, except in an emergency. 4.5.7.1 Normal landing It is recommended to dump the waterballast before landing on airfields. Dump the ballast before an outlanding in any case. Abeam the landing point extend the landing gear and set the wing flap to 8°...
  • Page 58 Flight manual DG-808C 4.5.7.3 Landing with the landing gear retracted Wheel-up landing is not recommended (see emergency procedures section 3.17). After wheel-up landing check the fuselage belly and the tow hook for damage. 4.5.7.4 Landing with asymmetric waterballast See emergency procedures section 3.15. 4.5.7.5 Extension and starting the engine after landing The same procedures as in flight may be used after landing for taxying.

  • Page 59: Flight With Water Ballast

    Flight manual DG-808C 4.5.8 Flight with water ballast 4.5.8.1 Wing tanks Recommended ballast for smooth thermals: rate of climb ballast litres U.S. gallons below none 1 – 2 200 - 400 2 - 4 400 - 800 more than max. ballast Do not exceed the maximum gross weight when loading the water ballast.

  • Page 60: Flight At High Altitude And At Low Temperatures

    Flight manual DG-808C 4.5.8.6 Dumping the waterballast First open the fin tank, then open both wing ballast tanks together. Do not empty one wing tank after the other to avoid an asymmetric loading condition. In flight the water drains at approx. 0.7 lt./sec. (1.5 lbs./sec). Warning: If suddenly the operating force of the fin ballast control handle is unusually low (you don’t feel the force of the retaining spring) you must suspect that the valve will not be opened.

  • Page 61: Flight In Rain And Thunderstorms

    Flight manual DG-808C 4.5.10 Flight in rain and thunderstorms With light rain the stall speed and the sink rate increases slightly and the approach speed has to be increased. Warning: Flights and especially winch launches in the vicinity of thunder storms should be avoided.

  • Page 62: Aerobatics

    Flight manual DG-808C 4.5.12 Aerobatics Permissible only without ballast in the wings and with engine retracted. Execute only the approved manoeuvres. At the recommended entry airspeeds there is no need to pull up abruptly, unnecessarily stressing the aircraft. The following manoeuvres are easy to execute. Wing flap setting for all manoeuvres 0°.
  • Page 63 Flight manual DG-808C Stall-turn To fly a stall-turn safely, please proceed as follows: After reaching the entry speed pull back the stick quickly, but not abruptly. During the pull out, shortly before reaching the vertical flight path initiate rotation with the rudder. Push the rudder quickly, but not abruptly. Also, at the highest point of the turn, the glider should still have a positive airspeed above stalling speed.

  • Page 64: Flight With The Engine Removed From The Aircraft

    Flight manual DG-808C 4.6 Flight with the engine removed from the aircraft The DG-808C can be flown without the engine when the engine is sent for a major overhaul, or removed to decrease the aircraft empty weight for competition flying. The following items must be executed: (see section 4.17 in the DG-808C maintenance manual).
  • Page 65 Flight manual DG-808C 5 Performance Section Page Introduction ....................5.2 Approved data ..................5.3 5.2.1 Airspeed indicator system calibration............5.3 5.2.2 Stall speeds ....................5.4 5.2.3 Take-off performance ................5.6 Additional Information ................5.7 5.3.1 Demonstrated crosswind performance............. 5.7 5.3.2 Gliding performance ................5.8 5.3.3 Flight polar ....................

  • Page 66: Introduction

    Flight manual DG-808C 5.1 Introduction This section provides approved data for airspeed calibration, stall speeds and take-off performance and non-approved additional information. The data in the charts has been computed from actual flight tests with the sailplane in good and clean condition and using average piloting techniques. Issued: Juni 2005 EASA app.

  • Page 67: Approved Data

    Flight manual DG-808C 5.2 Approved data 5.2.1 Airspeed indicator system calibration IAS = indicated airspeed CAS = calibrated airspeed Indicated airspeed calibrated airspeed 1 kts= 1 km/h / 1.852 Caution: The airspeed indicator is to be connected to the static ports and pitot probe in the fuselage nose.

  • Page 68: Stall Speeds

    Flight manual DG-808C 5.2.2 Stall speeds Stall speeds wing span 15 m The given speeds are the minimum achievable speeds during level flight in km/h and (kts.). Airbrakes retracted Flap mass setting 540 kg 1058 1157 1190 lbs. km/h kts. +8°...
  • Page 69 Flight manual DG-808C Stall speeds wing span 18 m The given speeds are the minimum achievable speeds during level flight in km/h and (kts.). Airbrakes retracted Flap mass setting 600 kg 1058 1157 1235 1323 lbs. km/h kts. +8° km/h kts.

  • Page 70: Take-Off Performance

    Flight manual DG-808C 5.2.3 Take-off performance The data is valid for take-off from dry level hard surface, no wind and proper condition of engine, propeller and aircraft. The take-off procedure is to be executed according to 4.5.2. = take-off roll = take-off distance to 15 m (50 ft.) altitude = temperature on ground = pressure altitude, can be computed as follows:...

  • Page 71: Additional Information

    Flight manual DG-808C Take-off performance, British, US 18 m span m = 970 lbs. m = 1160 lbs. m = 1320 lbs. T (°F) SR(ft) S(ft) SR(ft) S(ft) SR(ft) S(ft) (ft) 1001 1114 1233 1640 1128 1256 1097 1390 3280 1005 1273 1118...

  • Page 72: Gliding Performance

    Flight manual DG-808C 5.3.2 Gliding performance (data evaluated by comparison flights) Performance data with 15 m span (S = 10.68 m²) Mass Wing loading kg/m² 50.6 lbs./ft² 10.0 10.4 min. sink rate 0.55 0.58 0.61 0.67 0.68 ft/min km/h kts. best glide ratio 44.6 45.0...

  • Page 73: Flight Polar

    Flight manual DG-808C 5.3.3 Flight polar with 15 m wing span 1 kts= 1 km/h / 1.852, 1 m/s= 197 ft/min., 1 kg/m²= 0.2048 lbs/ft² Issued: September 2007 TN 800/34...
  • Page 74 Flight manual DG-808C Flight polar with 18 m wing span 1 kts= 1 km/h / 1.852, 1 m/s= 197 ft/min., 1 kg/m²= 0.2048 lbs/ft² Issued: September 2007 TN 800/34 5.10...

  • Page 75: Operating The Wing Flaps

    Flight manual DG-808C 5.3.4 Operating the wing flaps The following flap settings should be used for optimum performance for the speed ranges and wing loadings specified: Speeds in km/h wing span 15 m mass (kg) +8° up to 74 - 77 - 80 - 84 - 88...
  • Page 76 Flight manual DG-808C Operating the wing flaps cont. Speeds in kts. wing span 15 m mass 1060 1157 1190 (lbs.) +8° up to 40 - 42 - 43 - 45 - 48 - 50 - 50 +5° 40- 45 42- 47 43- 49 45- 51 48- 53...

  • Page 77: Performance Under Power

    Flight manual DG-808C 5.3.5 Performance under power 5.3.5.1 Rate of climb Measured rates of climb for 15°C (59°F) at MSL. 15°C increase in temperature reduces the rate of climb by ca. 0.2 m/s (40 ft/min.). R/C = climb rate at Vy = 90 km/h (49 kts.) and with flap setting +8° = altitude above sea level 1 m/s= 197 ft/min., 1 m= 3.2809 ft, 1 kg= 2.2046 lbs Issued: September 2007...

  • Page 78: Noise Data

    Flight manual DG-808C 5.3.5.2 Cruising Flight The cruising speed is 140-145 km/h (76-78 kts.) with maximum continuous power 6300 RPM. 5.3.5.3 Maximum operational altitude The maximum operational altitude is more than 5000 m (16000 ft) MSL. For continuous operation at higher altitudes, the main nozzle in the carburettor may be set to a smaller fuel flow in accordance with the engine manufacturer.
  • Page 79 Flight manual DG-808C 6 Mass (weight) and balance Section Page Introduction ....................6.2 Weighing procedures ................6.2 Weighing record ..................6.2 Basic empty mass and C.G..............6.2 Mass of all non-lifting parts (WNLP) ............6.2 Max. mass (weight) .................. 6.3 Useful loads....................

  • Page 80: Introduction

    Flight manual DG-808C 6.1 Introduction This section contains the payload range within which the sailplane may be safely operated. A procedure for calculating the in-flight C.G. is also provided. A comprehensive list of all equipment available for this sailplane is contained in the maintenance manual.

  • Page 81: Max. Mass (Weight)

    Flight manual DG-808C 6.6 Max. mass (weight) Maximum take-off and landing mass with waterballast Version DG-808C Classic Competiton wingspan 15 m 525 kg (1157 lbs.) 540 kg ( 1190 lbs.) wingspan 18 m 525 kg (1157 lb). 600 kg ( 1323 lbs.) Maximum take-off and landing mass without waterballast: Maximum take-off and landing mass = W wings...

  • Page 82: Loading Chart

    Flight manual DG-808C 6.8 Loading chart 6.8.1 Cockpit load Cockpit load see table on page 6.5, weighing report. With lower pilot weight necessary ballast must be added in the seat or in the optional ballast boxes (see below). Ballast put on the seat (lead ballast cushion) must be fastened at the connections of the safety belts.

  • Page 83: Weighing Report (For Section 6.3)

    Flight manual DG-808C 6.8.6 Weighing report (for section 6.3) Distances in mm, masses in kg 25.4 mm = 1 inch 1 kg = 2.2046 lbs. Date of weighing: wing span Executed by: Date of equipment list: Empty mass Empty mass C.G. Max.

  • Page 84: Empty Weight C.g. Limits (For 6.4)

    Flight manual DG-808C 6.8.7 Empty weight C.G. limits (for 6.4) Engine installed, retracted empty weight C.G. mm, 1 mm=1 in./25.4, 1 kg= 2.2046 lbs 620,0 615,0 610,0 rear C.G limit 605,0 600,0 595,0 590,0 585,0 580,0 575,0 cockpit load 570,0 565,0 85 kg 560,0...

  • Page 85: Ballast Chart (Total Ballast)

    Flight manual DG-808C 6.8.8 Ballast chart (total ballast) To determine the max. allowable total waterballast ( wing tanks + fin tank). Fuselage load = pilot + baggage etc. but without waterballast. All values in kg ( l ) 1 kg = 2.2046 lbs. 3.785 kg (l) = 1 US gal. Version DG-808C Classic) This table is for the max.

  • Page 86: Ballast Chart For The Fin Ballast Tank (Only Version Dg-808C Competition)

    Flight manual DG-808C This table is for the max. TOW of 600 kg (18m wingspan) empty mass fuselage load 6.8.9 Ballast chart for the fin ballast tank (only version DG-808C Competition) To determine the max. allowable waterballast in the fin tank or in the fuselage tanks.

  • Page 87: Calculation

    Flight manual DG-808C 6.9 C.G. calculation The actual C.G. can be determined as follows: For each item, the moment mass x C.G. has to be determined and to be added up and divided by the total mass (see the following example). 1 kg = 2.2046 lbs.
  • Page 88 Flight manual DG-808C 1 kg = 2.2046 lbs., 0.305 m = 1 ft If the actual pilot C.G. is not known, you have to take the values from the following table: Pilot mass [kg] Pilot C.G. [m] flight near the forward C.G. Flight near the aft C.G.
  • Page 89 Flight manual DG-808C 7 Sailplane and systems description Section Page Introduction ....................7.2 Airframe ....................7.2 Cockpit, cockpit controls and placards ............ 7.3 DEI-NT Operation ................. 7.10 Flight controls ..................7.17 Airbrakes ....................7.17 Landing gear ..................7.18 Tow hooks ....................7.18 Seats and safety harness .................

  • Page 90: Introduction

    Flight manual DG-808C 7.1 Introduction This section provides description and operating of the sailplane and its systems. M.M. = Maintenance manual Refer to section 9 "Supplements" for details of optional systems and equipment. 7.2 Airframe The DG-808C is a single-seater high performance motorglider with 18 m wing span.

  • Page 91: Cockpit, Cockpit Controls And Placards

    Flight manual DG-808C 7.3 Cockpit, cockpit controls and placards Issued: June 2005...
  • Page 92 Flight manual DG-808C 1) Control column - Parallelogram type 2) Release lever for the trim mechanism - green Operation see section 7.5 elevator control 3) Trim position indicator and trim preselection lever 4) Tow release knob - yellow 5) Rudder pedal adjustment knob – black By pulling on the knob, the locking pin will be disengaged and the rudder pedals can be pulled back towards the pilot or pushed forward away from the pilot.
  • Page 93 Flight manual DG-808C 10) Airbrake handle - blue The wheel brake is operated at the end of the airbrake handle travel and the flaps will be moved from negative to neutral. Parking brake combined with an airbrake securing device (Piggott- hook): Pull the airbrake handle back to actuate the wheelbrake and rotate the handle to the cockpit wall.
  • Page 94 Flight manual DG-808C 19) Fin waterballast dump lever Rotate backward to dump. The wing waterballast can only be dumped after dumping the fin waterballast. 20) Head rest. The head rest is integrated into the back rest to take up the rebound forces of the pilots head in the case of a crash landing.
  • Page 95 Flight manual DG-808C 26) Manual retraction – extension switch for the powerplant man. Any operation of this switch switches off the automatic extension-retraction system. Operation of the ignition switch reactivates the automatic system. up = extension down = retraction. Hold the switch until the extension procedure stops. Note: Extend the engine manually on the ground prior to take-off or for maintenance work.
  • Page 96 Flight manual DG-808C Propeller- Manual propeller-brake (grey) brake Optional automatic propeller brake: After switching off the ignition the automatic brake will slow down the propeller speed. The braking procedure starts as soon as the engine speed is below 3.000 RPM. The braking is continuous until the propeller is stopped. Then the brake opens again and the propeller must be positioned vertical by the airstream or with the starter motor (ignition off see item 28).
  • Page 97 Flight manual DG-808C Press button to test the second fuel pump with the engine fuel pump running at full throttle. test Pressing this button, you are switching off the first pump. Wing fuel tanks with electromagnetic valves (Option) The operating switch and the indication light are installed in the instrument panel at a suitable location.

  • Page 98: Dei-Nt Operation

    Flight manual DG-808C 7.4 DEI-NT Operation selector knob ignition switch test switch ignition circuits After turning on the main switch the DEI-NT shows a screen with operating times. Then the screen changes to the gliding screen (powerplant retracted) or to the powered flight screen (powerplant not retracted).
  • Page 99 Flight manual DG-808C 7.4.1. a) Gliding screen Upper centre: Stall factor, see set up menu. Upper right: Time, instead of the time the CHT, will be displayed as long as the CHT is above 50°C. Lower centre: engine time for this flight 7.4.1.
  • Page 100 Flight manual DG-808C c) When starting the engine a syringe symbol will be displayed (primer switch on auto position) whilst the primer valve is open. If the engine will not accelerate when increasing throttle you may press the starter button again to activate the primer again. The syringe symbol will be displayed again.
  • Page 101 Flight manual DG-808C The following lines will be displayed: RESET TRIP COUNTER: Push the selector knob, N (no) will be displayed, rotate the selector knob Y (yes) will be displayed, push the selector knob to reset the time to zero. RESET MAINT.
  • Page 102 Flight manual DG-808C SYSTEM SETUP ****: Only for service by the manufacturer. PROP BRAKE: Activation of the electrical propeller brake (Option). Push the selector knob, N will be displayed, rotate the selector knob, Y will be displayed, the propeller brake is activated. Rotate the selector knob N will be displayed, the propeller brake is deactivated.
  • Page 103 Flight manual DG-808C 7.4.5 Display of powerplant failures and warnings In case of powerplant failures and if warnings are necessary full screen messages are displayed. All messages may be verified by a short push of the selector knob, the DEI-NT changes back to the normal screen. Powerplant failures: Upper line displays "Failure"...
  • Page 104 Flight manual DG-808C - "Starter Run" = Starter motor didn’t disengage and produces electric power, stop the engine as soon as safety altitude is reached to prevent damage of the electrical system, This message can't be deleted by pushing the selector knob. - "EGT OverTemp"...

  • Page 105: Flight Controls

    Flight manual DG-808C 7.5 Flight controls Rudder control See diagram 2 MM Cable system with adjustable pedals. Elevator control: See diagram 1 M.M. Parallelogram control column stick. The parallelogram system reduces the possibility of pilot induced oscillations. All pushrods slide in maintenance free nylon ball guides. Automatic control hook up system.

  • Page 106: Landing Gear

    Flight manual DG-808C 7.7 Landing gear see diagram 15 and 16 MM. d) Main wheel: retractable, assisted by a gas strut, spring mounted, fully sealed landing gear box, internal drum brake (disc brake optionally), Tyre 5.00 - 5 4 PR or 6 PR, Diameter 362 mm (14.25 in) Tyre pressure 3 bar (44 psi) e) Tailwheel: Tyre 200 x 50 2 PR, Diameter 200 mm (7.87 in)

  • Page 107: Waterballast System

    Flight manual DG-808C 7.11 Waterballast system see diagram 5 MM. The wingtanks are constructed as double wall bags with a capacity of 60 l (15.85 U.S.gal) or 87 l (23 U.S. gal) per wing. The 87 l tanks are separated in 2 chambers to reduce the pressure load in case of spinning and positive g-loads.

  • Page 108: Fuel System

    Flight manual DG-808C 7.13 Fuel system 7.13.1 Fuselage tank 21 l (5.55 US gal.) (useable amount of fuel) A condensator type probe is installed in the tank to allow an indication which is almost independent from the pitch angle. A switch located at the lower end of the tank filler cuts off the electric power for the electric refuelling pump as soon as the tank is full.

  • Page 109: Electrical System

    To charge the battery to its full capacity a charger with 14.4 V max. charging voltage is necessary (normal automatic chargers charge only up to 13.8 V). Such a charger is available from DG Flugzeugbau code no. Z 08.  The DEI-NT (digital engine indicator) and its control unit control all automatic and safety functions.

  • Page 110: Pitot And Static System

    Flight manual DG-808C 7.15 Pitot and static system see diagram 6 M.M. Pitot probe in fuselage nose, static ports a short distance behind fuselage nose. The airspeed indicator is to be connected to these ports and probe. Probe (PC) for the stall warning device below the fuselage nose. Second set of static ports near the instrument panel for variometer or flight computer systems.

  • Page 111: Miscellaneous Equipment (Options)

    For the installation of the Dräger Höhenatmer E 20088 you will find an installation plan 6EP27 in the maintenance manual. 7.17.3 ELT Emergency Locator Transmitter To ensure a safe installation ask DG Flugzeugbau for an installation instruction. For the ELT ACK you will find an installation plan 8EP38 in the maintenance manual.
  • Page 112 Flight manual DG-808C 8 Sailplane handling, care and maintenance Section Page Introduction ....................8.2 Inspection period, maintenance ............... 8.2 Alterations or repairs ................8.2 Tie Down, Parking ................... 8.3 Transport ....................8.3 Towing on the ground ................8.4 Cleaning and Care ..................8.4 Power plant trouble shooting ..............

  • Page 113: Introduction

    Flight manual DG-808C 8.1 Introduction This section contains manufacturer's recommended procedures for proper ground handling and servicing of the sailplane. It also identifies certain inspection and maintenance requirements which must be followed if the sailplane is to retain that new-plane performance and dependability. It is wise to follow a planned schedule of lubrication and preventive maintenance based on climatic and flying conditions encountered.

  • Page 114: Tie Down, Parking

    Flight manual DG-808C 8.4 Tie Down, Parking Use textile ropes or straps to tie down the wing tips. The fuselage should be tied down just ahead of the fin. Water ballast can be left in the wings for a few days only, but not when there is the possibility of freezing! On sunny days the cockpit should be closed and covered.

  • Page 115: Towing On The Ground

    Flight manual DG-808C 8.6 Towing on the ground a) by towing from the tow hook using a rope with the standard double ring approved for the release b) by using a tow bar which is fixed at the tail dolly and a wing tip wheel. The tow bar and wing tip wheel may be ordered through the DG-Flugzeugbau factory.
  • Page 116 Flight manual DG-808C Plexiglas canopy - Use clean water and a chamois for cleaning. - Stubborn dirt and small scratches can be removed by use of the "Schwabbel procedure" (see maintenance manual section 3.1). Metal parts - The pins and bushes for rigging the aircraft are not surface protected and must be covered with grease at all times.

  • Page 117: Power Plant Trouble Shooting

    Flight manual DG-808C 8.8 Power plant trouble shooting 1a) Extension and retraction doesn't work DEI-NT or control unit or wiring defective. 1b) Automatic retraction doesn't work The proximity switch at the upper drive belt pulley is defective. In case of a short circuit in the switch the DEI-NT displays the failure message “RPM Pickup”.
  • Page 118 Flight manual DG-808C Fuel leaks out of the carburettors see 4 A Loss of electrical power see flight manual section 3.11. Ignition problems No spark: on 1 spark plug of one ignition circuit: Spark plug, ignition cable or electronic box defective. on both spark plugs of one ignition circuit: Too low starting RPM;...
  • Page 119 Flight manual DG-808C 9 Supplements Section Page Introduction ....................9.2 List of inserted supplements ..............9.2 Emergency bail-out aid NOAH ............... 9.3 Issued: June 2005...
  • Page 120 Flight manual DG-808C 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. 9.2 List of inserted supplements Date of Document No.
  • Page 121 Flight manual DG-808C 9.3 Emergency bail-out aid NOAH Section 1 Introduction In the following text the changes to those sections of the flight manual which are affected by the installation of winglets at the 18m wingtips will be given Brief description NOAH is a system to facilitate the bail-out from the cockpit in an emergency.
  • Page 122 Flight manual DG-808C Section 3 Use of NOAH in case of an emergency bail out: Note: We recommend strongly the use of an automatic parachute. Only with an automatic parachute will the bail out procedure be nearly automatic and precious time and altitude can be saved.
  • Page 123 Flight manual DG-808C Section 7 The NOAH actuation handle is located at the right hand side abeam the control stick, it is marked black and yellow. A sticker is wrapped around the actuation handle and the guiding NOAH tube for the actuation cable. The sticker serves as an additional airbag means to guard against inadvertent operation.

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Dg-808c

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