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The Light Weight Engine Houtekietstraat 11

B-8540 Deerlijk, Belgium

EFFECTIVITY

page 31

ALL

19-3-2019

If a fuel pressure indicator is installed, it may be used to recognize irregularities of the fuel system or
of the fuel pressure.

NOTE

Strong indicators of upcoming problems or failures within the fuel supply system are unsteady or
constantly low fuel pressure. Blocked filters, bended pipes or a damaged fuel pump could be the
source of these problems.

Too high fuel pressure is an indication of a damaged regulating valve or a blocked back flow pipe.

Once these signs recognized it is mandatory not to take off again and if in flight to land as soon as
possible on the nearest airfield.

Defective switches or fuses within the fuel supply system have to be replaced before next flight.

Important Information fuels and lubricants :

Fuel :

Automobile fuel, unleaded premium

95 Octane (RON) minimum.

Fuel pressure :

2,5 BAR

Oil type :

Fully synthetic branded automotive oil to API SJ standard as a
minimum. Engine warranty is void if oil is used that is below
this standard.

Oil volume:

3,5 Litres

Oil level is between

Ensure between max. & min. On standard oil tank 2 cm above
middle of the tank.

Oil pressure:

1,5 Bar @ 2000 RPM

0,8 Bar @ idle RPM

Oil temperature (readings off of the feed line into engine):

Min. 50 Deg.C (122 Deg.F)

Max. 110 Deg.C (230 Deg. F)

Optimum oil temperature range :

–

100 Deg.C (170-212 F.)

CAUTION!

Don’t use any

additives

Содержание LF39

Страница 1: ...Houtekietstraat 11 B 8540 Deerlijk Belgium EFFECTIVITY page 1 ALL 19 3 2019 D MOTOR International AIRCRAFT ENGINE ENGINE OWNERS MANUAL TYPE LF39 6 Cylinder Engine Publication LF39_2019_2 D Motor Inter...

Страница 2: ...2019 V2 KGhekiere Published and printed in Belgium by D Motor International bvba Copyright 2013 2015 2019 D Motor International bvba All rights reserved This material may not be reprinted republished...

Страница 3: ...he page footer Information on the page that changed from the previous edition is identified by a vertical six point black line referred to as a change bar in the outside margin of the page A page chan...

Страница 4: ...pection or annually 37 200 hour inspection 38 Preservation of the engine for long term storage 38 Winter operation 38 TROUBLE SHOOTING 39 Engine does not fire 39 Warm engine shows irregular idling 39...

Страница 5: ...The Light Weight Engine Houtekietstraat 11 B 8540 Deerlijk Belgium EFFECTIVITY page 5 ALL 19 3 2019 Blank Page intentional...

Страница 6: ...Motor aircraft engines are a Premium Quality European Product designed and produced in Belgium https www d motor eu SCOPE AND PURPOSE OF THIS DOCUMENT This manual gives instruction and guidance for en...

Страница 7: ...d as follows WARNING A warning emphasizes information which if disregarded could result in severe injury to personnel or equipment failure CAUTION Emphasizes certain information or instructions which...

Страница 8: ...n of a publication from cover to cover Minor corrections are released as change pages to the original publication identified with a change number and effective change date in the page footer Informati...

Страница 9: ...es suggestions regarding products parts or service If customers have an inquiry or require technical assistance they should contact their local D Motor dealer distributor or field representative To co...

Страница 10: ...ully read this Operators Manual The Manual provides you with basic information on the safe operation of the engine If any passages of the Manual are not clearly understood or in case of any questions...

Страница 11: ...with flying Make sure that you also obtain as much information as possible about your aircraft and engine Service and Information Bulletins their maintenance and operation from your dealer Be aware t...

Страница 12: ...y ECU Generator 300 W 25A integrated Bore 103 5 mm Stroke 80 mm Displacement 3 900 cc Compression 8 1 1 Starter 12V 1 1 KW integrated Fuel pressure 2 5 3 0 bar 36 2 43 5 PSI Fuel regulator 2 5 bar 36...

Страница 13: ...ature min 50 C to 120 C 80 C to 100 C best range Cooling liquid Water with antifreeze and anticorrosive for Aluminium motors Cooling liquid temperature 50 C to 100 C opening pressure at 1 2 bar See Se...

Страница 14: ...The Light Weight Engine Houtekietstraat 11 B 8540 Deerlijk Belgium EFFECTIVITY page 14 ALL 19 3 2019 LF 39 type ENGINE exploded...

Страница 15: ...aft position analogue Crankshaft position digital Air pressure Cooling liquid temperature On board power supply voltage RPM Lambda probe values If one of the sensors fails the ECU change into a standa...

Страница 16: ...rcrafts Engine 6 cylinders four stroke liquid cooled Displacement 3993 cc Stroke 79 mm Compression ratio 8 1 Max power 125 Hp at 3000 RPM Max continuous power 112Hp hp at 2800 RPM Used fuel 91 93 95 o...

Страница 17: ...emperature sensor Oil filter oil tank with breather system Exhaust pipes included and lambda probe no mufflers are included The liquid cooling system radiator hoses and expansion tank are not included...

Страница 18: ...ijk Belgium EFFECTIVITY page 18 ALL 19 3 2019 WARNING DUE TO THE PRECISION OF THE ECU CRANKSHAFT ROTATION MEASUREMENT IT IS POSSIBLE TO HAND START THE LF39 BY ROTATING THE PROPELLER ALWAYS ENSURE ALL...

Страница 19: ...The Light Weight Engine Houtekietstraat 11 B 8540 Deerlijk Belgium EFFECTIVITY page 19 ALL 19 3 2019...

Страница 20: ...The Light Weight Engine Houtekietstraat 11 B 8540 Deerlijk Belgium EFFECTIVITY page 20 ALL 19 3 2019 Center Of Mass CG...

Страница 21: ...a choke or an intake air heating Thanks to the ECU and the injection system the motor may be started at any temperature without any special precaution The handling of the motor is based on following e...

Страница 22: ...nd check the oil pressure Warm up with about 1200 RPM If the oil pressure is insufficient or in case of an error message from the ECU stop the engine and if necessary investigate for the problem If no...

Страница 23: ...econds it reduces the remaining pressure in the fuel system Switch OFF both ignition circuits then the engine stops Switch OFF the ECU Turn OFF the start release key switch For parking maintain this s...

Страница 24: ...e to reach your destination By reducing the power setting speed is reduced only slightly but the consumption is massively lower Further your range is much higher Please see therefore the consumption t...

Страница 25: ...gency landing has to be prepared immediately The remaining running time of the motor without cooling liquid are a few minutes this means that after the power setting has been reduced to idle the remai...

Страница 26: ...g from the intake system points to problems coming from a defective or loose air filter system This means danger for the motor respectively the possibility of intake of additional air or worse the suc...

Страница 27: ...lder the liquid is not sucked back in the cooling system of the engine anymore An indication to that is for example if the temperature of the motor is normal during the flight but during or after the...

Страница 28: ...pring loaded ball valve regulates the oil pressure The over pressure coming from the movement of the pistons press the oil back in reservoir Insufficient oil level may lead to heavy damages on the eng...

Страница 29: ...gear pump may get empty and the gear pump may suck air instead of oil In such case the required oil pressure is not reached at all or too late If this happens stop immediately the engine refill the o...

Страница 30: ...he fine filter into the common rail system The injectors gets the required quantity of fuel and the rest is pushed back again into the fuel tank A pressure regulation valve in the back flow system kee...

Страница 31: ...off again and if in flight to land as soon as possible on the nearest airfield Defective switches or fuses within the fuel supply system have to be replaced before next flight Important Information f...

Страница 32: ...gium EFFECTIVITY page 32 ALL 19 3 2019 Cooling system Liquid cooled Max water temperature 100 Deg C Max continuous power keep water temperature between min 75 max 95 Deg C 50 coolant by volume Recomme...

Страница 33: ...rical power for the fuel pump injectors ECU and the ignition without discharging the battery even at idle regime The charge condition is surveyed by the digital transformer and limited to 14V All cons...

Страница 34: ...Ultra R1 537 The engine must be cold before the spark plugs are torque tightened TABLE FOR TORQUE VALUES Nm Oil drain screw M22 15 Oil pump screw banjo M18 32 Crankcase screw small M6 12 Crankcase med...

Страница 35: ...and 30 for used spark plugs When replacing used spark plugs two points in particular are to be observed Firstly under no circumstances must contamination around plug hole fall into combustion chamber...

Страница 36: ...The Light Weight Engine Houtekietstraat 11 B 8540 Deerlijk Belgium EFFECTIVITY page 36 ALL 19 3 2019 Performance Curve of the LF39 Engine...

Страница 37: ...the oil tank and fittings Perform an oil change and send sample to constructor Change the oil filter Fuel lines check the standoffs safeties leaks and wear Fuel filter check clean Check the ignition h...

Страница 38: ...lace in a large heavy duty plastic bag with a minimum of 4KG of desiccant bags Take care not to puncture the plastic storage bag Using a vacuum cleaner draw all the air out of the storage bag and seal...

Страница 39: ...M until the oil temperature reaches 50 deg C 122 deg F TROUBLE SHOOTING Engine does not fire Cause Action Ignitions OFF ON Spark plug gap too big Change plugs or re gap plugs Fuel shutoff valve OFF or...

Страница 40: ...ter blocked fuel pressure indicator below 2 5 Bar Disassemble and replace the filter Engine overheats Oil temperature over 100 Deg C 212 deg F Cause Action Too much oil remaining in the crankcase Chec...

Страница 41: ...prescribed grade fuel Intake leaking Tighten all connections Replace defective parts Low oil pressure Cause Action Insufficient oil in oil tank Check oil level and fill if necessary Oil remains in eng...

Страница 42: ...major overhaul is necessary Poor oil quality Change oil Use prescribed oil Worn valve guides or bad valve guide seals A top overhaul is necessary External oil system leaky Check for defects and correc...

Страница 43: ...tween overhaul TBO is at present 1500 hours of operation An increase of TBO due to field experience will be published in the Service Bulletins of the manufacturer Major repairs and major modifications...

Страница 44: ...ples per second depending on the software version Water is used to cool down the D Motor engine it has high specific heat capacity It can absorb a large amount of heat without a high increase in tempe...

Страница 45: ...he backplate indicating 105 C 221 F for example means that the engine has temperatures of over 130 140 C 266 F 284 F These temperatures are having a distructive influence on your engine EGT and CHT An...

Страница 46: ...uld not exceed 10 C Permanent monitoring of coolant temperature is necessary Water and Oil in your engine Water can get into the oil two ways You generally don t have to worry about one of the ways if...

Страница 47: ...ly warmed up If the oil stays to cold condensation can build up in the engine This condensation water in the oil can only be removed from that oil if the oil temperature is high enough to evaporate th...

Страница 48: ...y this The greatest risk to damage is caused by cavitation The steam bubbles in the water occur when the pressure drops to far and the temperature rises to high Vibrations of components or housing wal...

Страница 49: ...gine or not Flying at MSL 100 ft or 5000 ft is not the same again common sense and knowledge of the engine by the pilot Warranty VOID All engines that ran at 1 2 Bar water pressure at more then 105 C...

Страница 50: ...The Light Weight Engine Houtekietstraat 11 B 8540 Deerlijk Belgium EFFECTIVITY page 50 ALL 19 3 2019 Blank Page intentional...

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