D-MOTOR LF39 Owner's Manual
  1. Manuals
  2. Brands
  3. D-MOTOR Manuals
  4. Engine
  5. LF39
  6. Owner's manual

D-MOTOR LF39 Owner's Manual

Aircraft engine 6 cylinder engine, 4 cylinder engine
Hide thumbs Also See for LF39:
Table of Contents

Advertisement

Quick Links

The Light Weight Engine
D-MOTOR International © AIRCRAFT ENGINE
ENGINE OWNERS MANUAL
TYPE LF39 - 6 Cylinder Engine
Publication : LF39_2019_2
© D-Motor International bvba, March 2019
EFFECTIVITY
ALL
Houtekietstraat 11
B-8540 Deerlijk, Belgium
page 1
19-3-2019

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the LF39 and is the answer not in the manual?

Questions and answers

Related Manuals for D-MOTOR LF39

Summary of Contents for D-MOTOR LF39

  • Page 1 The Light Weight Engine Houtekietstraat 11 B-8540 Deerlijk, Belgium D-MOTOR International © AIRCRAFT ENGINE ENGINE OWNERS MANUAL TYPE LF39 - 6 Cylinder Engine Publication : LF39_2019_2 © D-Motor International bvba, March 2019 EFFECTIVITY page 1 19-3-2019...
  • Page 2 This manual is a revision of the previous manual published in 2013 and any revisons there of. Information within this document replace the instructions of previous D-Motor International Publications – Engine Owners Manual. Effective Changes for this manual / document...

  • Page 3: Table Of Contents

    Suggestions and corrections Contact Information TOA (Table of Amandments) SAFETY INFORMATION MAIN SECTION Technical Sheet LF39 type D-Motor Engine Description Center Of Mass (CG) ASSEMBLY SHORT PROPELLOR FLANGE HANDLING OF THE ENGINE Motor START The handling of the motor is based on following elements...
  • Page 4 Important Information fuels and lubricants : Water Pump Power Supply Control and function test of the power supply Spark plugs Performance Curve of the LF39 Engine Periodic inspections First 25 & 50-hour-inspection 100-hour-inspection or annually 200-hour-inspection Preservation of the engine for long term storage...

  • Page 5: Blank Page (Intentional)

    The Light Weight Engine Houtekietstraat 11 B-8540 Deerlijk, Belgium Blank Page (intentional) EFFECTIVITY page 5 19-3-2019...

  • Page 6: Introduction

    INTRODUCTION D-MOTOR Engines D-Motor LF 26 4 cylinder and LF39 6 cylinder engines are direct drive 100% water cooled boxer side valve engines. The engines incorporate multi-point fuel injection controlled by an advanced twin ECU control system which is performance mapped with Lambda sensing.

  • Page 7: Warning

    The Light Weight Engine Houtekietstraat 11 B-8540 Deerlijk, Belgium Warning This is a non-certified aircraft engine ; the possibility of engine stoppage exists at all times. Do not operate this engine over densely populated areas. Do not operate this engine over terrain where a safe, power off landing cannot be performed.

  • Page 8: Order Of Precedence

    Direct recommended changes or questions to the attention of “Publications” at the address listed in this section, “Contact Information” or send comments via e-mail to info@d-motor.eu. Notify our Customer Service Department immediately, using our telephone number, if you discover...

  • Page 9: Contact Information

    B-8540 Deerlijk, Belgium Contact Information D-Motor International factory representatives are available to answer technical questions and encourages 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.

  • Page 10: Toa (Table Of Amandments)

    If any passages of the Manual are not clearly understood or in case of any questions, please contact an D-Motor International® authorized aircraft engines dealer/distributors or their independent service center. D-Motor International wishes you much pleasure and satisfaction flying your aircraft powered by this D-Motor®-Aircraft engine.

  • Page 11: Safety Information

    • The D-Motor engine is not suitable for acrobatics. • The selection and use of the D-Motor on any aircraft is at the sole discretion and responsibility of the aircraft manufacturer, assembler and owner or user. • Duet o different designs, equipment and types of aircraft, D-Motor will allow no warranty or representation on the suitability of its engine’s use on any particular aircraft.

  • Page 12: Main Section

    The Light Weight Engine Houtekietstraat 11 B-8540 Deerlijk, Belgium MAIN SECTION Technical Sheet LF39 type D-Motor Engine Producer D-Motor, Belgium Construction 6 cylinder boxer motor, 4 stroke Reduction gear Cooling fully liquid cooled Control unit ECU – 12 V 8A for ECU and fuel pump required...
  • Page 13 The Light Weight Engine Houtekietstraat 11 B-8540 Deerlijk, Belgium Oil specification Synthetic 5W50 - 5W40 - 0W50 – 0W40 Oil quantity 3.5 Liters (0.91 US Gallons) Oil filter P/N 107001 Oil temperature min 50° C to 120° C 80°C to 100°C best range Cooling liquid Water with antifreeze and anticorrosive (for Aluminium motors)
  • Page 14 The Light Weight Engine Houtekietstraat 11 B-8540 Deerlijk, Belgium LF 39 type ENGINE (exploded) EFFECTIVITY page 14 19-3-2019...

  • Page 15: Description

    B-8540 Deerlijk, Belgium Description The D-Motor LF 39 is a 100% water cooled boxer motor with side steered valves for direct driven propellers. The motor has a lambda probe and performance map controlled multi field injection with double ignition. The 300W/25A generator is fully integrated; the oil and cooling liquid pumps are directly driven by the camshaft.
  • Page 16 B-8540 Deerlijk, Belgium The above is one option, please contact our sales team for all possible options, incl. heli options. Short specification list • Type: D- motor LF39 • Class: Microlight aircrafts • Engine: 6 cylinders, four stroke, liquid cooled •...
  • Page 17 The Light Weight Engine Houtekietstraat 11 B-8540 Deerlijk, Belgium Accessories Delivered with standard engine package: • The engine with integrated alternator, water pump, oil pump and electric starter. • Rubber mounts (dimensions same as Jabiru and UL power). • Fuel pump, fuel filter and injectors. •...
  • Page 18 B-8540 Deerlijk, Belgium 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 SWITCHES ARE OFF BEFORE WORKING ON THE LF39 type ENGINE. EFFECTIVITY...
  • Page 19 The Light Weight Engine Houtekietstraat 11 B-8540 Deerlijk, Belgium EFFECTIVITY page 19 19-3-2019...

  • Page 20: Center Of Mass (Cg)

    The Light Weight Engine Houtekietstraat 11 B-8540 Deerlijk, Belgium Center Of Mass (CG) EFFECTIVITY page 20 19-3-2019...

  • Page 21: Assembly Short Propellor Flange

    B-8540 Deerlijk, Belgium ASSEMBLY SHORT PROPELLOR FLANGE (Example) D-Motor offers different types of propellor flanges – check our price list or contact our sales team. HANDLING OF THE ENGINE Motor START The LF 26 does not have 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.

  • Page 22: After The Pre-Flight Check And Provided The Propeller Area Is Free The Motor Is Started

    The Light Weight Engine Houtekietstraat 11 B-8540 Deerlijk, Belgium CAUTION! Never start the engine without prop installed. Otherwise the engine will be damaged. After the pre-flight check and provided the propeller area is free the motor is started: • Release the start with the key switch •...

  • Page 23: Motor Stop

    The Light Weight Engine Houtekietstraat 11 B-8540 Deerlijk, Belgium Motor STOP If possible the engine should not be stopped when it is very hot. As the cooling liquid and the fuel are not pumped anymore it may create vapour lock problems due the residual heat. Generally it is enough if the landing is made with reduced power setting and following taxiing to cool down the motor temperature sufficiently to enable an immediate stopping of the motor.
  • Page 24 Each engine coming from serial production has its typical behaviour at different regimes. This is like a character of each individual engine. Even if the LF39 is an engine which runs extremely smoothly, it’s recommended to avoid regimes where your engine shows up with more vibrations.

  • Page 25: Emergency Procedures

    The Light Weight Engine Houtekietstraat 11 B-8540 Deerlijk, Belgium Emergency Procedures Normally the engines for Ultra-light or LSA aircraft are not certified, but also a certification does not protect from engine failures. Please bear in mind that for any existing aircraft or any existing engine a failure is possible.

  • Page 26: Ecu Error Messages

    • Heavy vibrations Since the LF39 has an injection system carburator icing cannot occur and not be the reason for heavy vibrations. This means that in case heavy vibrations occurs, they must come from other sources, like the propeller, loss of counterweights on the propeller, loose bolt holding the propeller, loose spinner, etc.

  • Page 27: Safety / Avoiding Failures

    The Light Weight Engine Houtekietstraat 11 B-8540 Deerlijk, Belgium The error number 8 may be shown also directly after the start of a cold engine. In this case the required temperature of the probe to make a precise measurement is yet not reached. After warming up the error message should disappear.

  • Page 28: Oil Supply

    The Light Weight Engine Houtekietstraat 11 B-8540 Deerlijk, Belgium NOTE For example: Oil temperature is 90°C to 95°C and cooling liquid has about 80°C. Should the difference of the temperature be higher or lower, the oil, the cooling liquid and the sensors needs to be checked.

  • Page 29: Throttle Adjustments

    The Light Weight Engine Houtekietstraat 11 B-8540 Deerlijk, Belgium reservoir cap and check if sign of water are visible, especially watch out for traces of foam, which is an indication that the oil has some water in it. Verify the hose clips of the oil supply system for tightness and verify that the pipes are not bended. A slightly low oil level does not automatically lead to engine damage, but may lead to higher temperature as there is not enough oil available for the inner cooling of the engine.

  • Page 30: Fuel Supply

    The Light Weight Engine Houtekietstraat 11 B-8540 Deerlijk, Belgium by increasing RPM to 1800 RPM and bring throttle back to idle. Engine must run smooth and continuously ! Fuel Supply A safe operation of an engine with fuel injection is only given if the fuel supply is secured with sufficient pressure in the system.

  • Page 31: Important Information Fuels And Lubricants

    The Light Weight Engine Houtekietstraat 11 B-8540 Deerlijk, Belgium 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.

  • Page 32: Water Pump

    The Light Weight Engine Houtekietstraat 11 B-8540 Deerlijk, Belgium 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. Recommended coolants are: BP Procool and Shell Glyco Shell Water Pump EFFECTIVITY page 32...

  • Page 33: Power Supply

    The Light Weight Engine Houtekietstraat 11 B-8540 Deerlijk, Belgium Power Supply An engine with fuel injection requires for a safe operation a trouble-free power supply. The ECU receives all relevant data from the sensors, calculates the optimal ignition and injection time, as well as the required fuel quantity which needs to be injected and the injection duration.

  • Page 34: Spark Plugs

    The Light Weight Engine Houtekietstraat 11 B-8540 Deerlijk, Belgium Spark plugs • Spark plugs should only be removed when engine is cold. • Brush clean with a plastic bristle brush. • Do not use a brass brush or a steel wire brush for cleaning. •...
  • Page 35 The Light Weight Engine Houtekietstraat 11 B-8540 Deerlijk, Belgium If torque wrench is not available. Tighten as far as possible by hand with spark plug tool and then 90° for new spark plug 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.

  • Page 36: Performance Curve Of The Lf39 Engine

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

  • Page 37: Periodic Inspections

    The Light Weight Engine Houtekietstraat 11 B-8540 Deerlijk, Belgium Periodic inspections After the first 25 hours of operation the inspections listed in 6.2.1 are to be performed. The next inspection is due to at 50 hours and thereafter every 100 hours. The 100-hour inspection mentioned is to be performed every 100 hours but at least annually.

  • Page 38: 200-Hour-Inspection

    The Light Weight Engine Houtekietstraat 11 B-8540 Deerlijk, Belgium 200-hour-inspection • carry out the 100-hour-inspection. • Check the spark plug caps. Change if necessary. • Change the fuel filter. • Change the air filter. Preservation of the engine for long term storage For long out of operation periods and at extreme climatic conditions, we recommend the following instructions to protect against corrosion.

  • Page 39: Trouble Shooting

    The Light Weight Engine Houtekietstraat 11 B-8540 Deerlijk, Belgium • Check the liquid coolant mix is suitable to cope with an outside air temperature of -36 deg C. In Countries with extremely low temperatures it is recommended to protect the battery against freezing by keeping it in a warm location for storage between flights.

  • Page 40: Engine Runs Erratic Or Misfires Occasionally

    The Light Weight Engine Houtekietstraat 11 B-8540 Deerlijk, Belgium Cause Action Intake manifold leaky Tighten all intake connections. Replace any defective parts. Engine runs erratic or misfires occasionally Cause Action Spark plug failure Clean plugs inside and outside. Replace if necessary. Ignition wire breaks down Check ignition wire and replace if necessary.

  • Page 41: The Engine Does Not Develop Full Power

    The Light Weight Engine Houtekietstraat 11 B-8540 Deerlijk, Belgium The engine does not develop full power Cause Action Ignition trouble Tighten all connections. Too much oil remaining in the crankcase Check oil return line. Fuel supply inadequate (less than 2,5 Bar) Check fuel filter.

  • Page 42: Excessive Oil Consumption

    The Light Weight Engine Houtekietstraat 11 B-8540 Deerlijk, Belgium Idle speed to high Adjust proper idle speed (800 r/min) (1010 r/min for helicopters) Ignition switch defective Replace the switch. Excessive oil consumption Cause Action Piston rings or oil scraper rings worn A major overhaul is necessary Poor oil quality Change oil.

  • Page 43: Overhauls

    The Light Weight Engine Houtekietstraat 11 B-8540 Deerlijk, Belgium OVERHAULS Major inspections at TBO is to be performed by the manufacturer or approved service centres only. For this purpose the engine is to be sent with its logbook to the manufacturer or the nearest approved service centre.

  • Page 44: Water And Oil

    Our Engine Control Unit (ECU) logs all active temperatures at a rate of 10/5 or 2 samples 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 temperature.
  • Page 45 (AFR). Cylinder Head Temperature (CHT) Gauge - Indicates the temperature of at least one of the cylinder heads. Used to set the fuel/air mixture. D-Motor delivers optional a dashboard gauge with monitoring probes per cylinder. (P/N 500052) EFFECTIVITY page 45...
  • Page 46 D-Motor is cooling both cylinder head and cylinders. The red line for cylinder head temperature is the max. water temperature ! As D-Motor cools both head and cylinder body, it is obvious that the temperature difference between IN and OUT should not exceed 10°C.
  • Page 47 Above 100 °C / Above 212 °F About water and oil temperature The D-Motor engines are not high temperature engines. (some new cars are operating with a water temperature of 140°C). The optimal range is 80°C - 90°C for water and 90°C to 100°C for oil.
  • Page 48 Rotax with the D-Motor limits is of no use ! The best practise for cooling the D-Motor engines is to keep the Temp IN and Temp OUT close to each other (+/- 10°C). Temp IN is measured on a other place then Temp OUT ! When the three coulor code is installed in the cockpit, a pilot should see if the temperature rises above 90°C, and act! Eurocopter voids warranty if temperature is logged more then 15...
  • Page 49 Houtekietstraat 11 B-8540 Deerlijk, Belgium seconds above 100°C … We at D-Motor call for the common sense, but ask the pilots to reduce power when reaching the yellow zone. The Engine Control Unit logs the action taken, and will be the only proof that a pilot overheated his engine or not. Flying at MSL, 100 ft or...

  • Page 50: Blank Page (Intentional)

    The Light Weight Engine Houtekietstraat 11 B-8540 Deerlijk, Belgium Blank Page (intentional) EFFECTIVITY page 50 19-3-2019...

This manual is also suitable for:

Lf26

Table of Contents