LIMBACH L 1700 Series Installation Manual Download

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I n s t a l l a t i o n M a n u a l

L 1 7 0 0

L 2 0 0 0

a n d

L 2 4 0 0 S e r i e s

Lim bach Flug mo to ren GmbH & Co. KG
Kot thaus ener Str. 5
53639 Kö nigs win ter
Ger ma ny
Tel.: 02244 / 9201 - 0
Fax: 02244 / 9201 - 30

Part-No. 905.170.010.000

Edi tion: 01.03.99



Limbach Flugmotoren GmbH & Co. KG

Flugmotoren

Summary of Contents for L 1700 Series

Page 1: ...700 L 2000 and L 2400 Series Limbach Flugmotoren GmbH Co KG Kotthausener Str 5 53639 Königswinter Germany Tel 02244 9201 0 Fax 02244 9201 30 Part No 905 170 010 000 Edition 01 03 99 Limbach Flugmotoren GmbH Co KG Flugmotoren ...

Page 2: ...1 1 2 Carburetor System 4 2 4 4 1 2 L 2400 EF Engine 4 3 4 4 1 2 1 Components 4 3 4 4 1 2 2 Description 4 3 5 ELECTRICAL SYSTEM 5 1 5 5 1 Description 5 1 5 5 2 L 2000 Series Engines 5 1 5 5 3 L 2400 EF Engine 5 2 5 5 3 1 Description 5 2 5 5 3 2 Connection of the Engine Electrics 5 4 5 5 3 2 1 Mounting of the ECU and wiring loom 5 4 5 5 3 2 2 Connection of the wiring loom 5 4 5 5 3 2 3 Connection o...

Page 3: ... L 2000 Series Engines 5 10 5 5 4 2 L 2400 EF Engine 5 11 6 ENGINE MOUNT 6 1 7 EXHAUST SYSTEM 7 1 7 7 1 General 7 1 7 7 2 L 2400 EF 7 3 8 PROPELLERS 8 1 8 8 1 L 2000 Series Engines 8 1 8 8 1 1 L 2400 EF Engine 8 1 9 VIBRATIONS 9 1 10 COWLING 10 1 10 10 1 L 2000 and Series 10 1 10 10 2 L 2400 EF Engine 10 1 10 10 2 0 1 Air Inlet 10 1 10 10 2 0 2 Air Ducting 10 1 10 10 2 0 3 Air Outlet 10 1 10 10 3 ...

Page 4: ...Flugmotoren 1 Prepared by J B Meyer Replaces edition from 10 03 86 Page 1 1 Checked by Edition 01 03 1999 Reg Number Installation Manual L 1700 L2000 and L 2400 Series ...

Page 5: ...ain cases your aviation authorities may waive their requirements or procedures if a reasonable expla nation is given 1 3 Applicability This manual is applicable to all engines of the following types LIMBACH L 1700 L 2000 L 2400 The chapters are divided up into L 2000 and series and L 2400 EF engine headings L 2000 and series represents all L 1700 L 2000 and L 2400 EB engines which are air cooled a...

Page 6: ...ces all dimensions are given in milli meters 2 1 Definitions Following an illustration indicating the cylinder designation direction of rotation etc Flugmotoren 2 Prepared by J B Meyer Replaces edition from 10 03 86 Page 2 1 Checked by Edition 01 03 1999 Reg Number Installation Manual L 1700 L2000 and L 2400 Series 1 3 2 4 front rear top bottom rotation right left Fig 2 1 ...

Page 7: ...0 mm of water standard atmospheric pressure Baffles B must be fitted correctly to achieve the optimum cooling performance The baffles should touch the cooling fins of the en gine and must be sealed S against the cowling and the engine To obtain the correct fit at the propeller is more difficult but must also be achieved with care Openings the size of the palm of the hand can be observed in this ar...

Page 8: ...tched off and that the duct X does not block the cooling air exit E Caution Use a carbon monoxide warning device to protect the crew from a defictive heating system Note The cooling system will absorb power which is no longer available for flight propulsion A well designed cooling system will minimize these losses and increase the flight performance and or lower the fuel consumption It is very imp...

Page 9: ...gmotoren 3 Prepared by J B Meyer Replaces edition from 10 03 86 Page 3 3 Checked by Edition 01 03 1999 Reg Number Installation Manual L 1700 L2000 and L 2400 Series Fig 3 2 L 2400 EF Cooling System Layout ...

Page 10: ...ct and are used in several types of automobiles This eliminates the need for the cooling ducting which is to be found in the conventional cooling system LIMBACH Flugmotoren do not recommend this practice The use of individual items is recommended for safety If a component fails it will not eliminate the complete system and will allow the aircraft to return safely possibly on reduced power 3 1 2 1 ...

Page 11: ...nt for bleeding 3 1 2 3 Oil Cooling Oil cooling Fig 3 3 requires another radiator or heat exchanger which can be slightly larger than required because of the thermostat The oil cooler is delivered within the installation kit The oil cooler may be attached directly to the cowling and the cooling air is provided through an NACA inlet N and a Duct D to the oil cooler O The cooler must be sealed again...

Page 12: ...ders approx 0 2 m3 s 0 17 kg s Size of oil cooler approx 2 0 dm2 3 1 2 5 Generator Cooling On the rear of the generator is a cooling cap to prevent overheating of the diode plate A wire re inforced hose of diameter 25 mm supplies pre cooling air to the oil cooler at the NACA inlet Flugmotoren 3 Prepared by J B Meyer Replaces edition from 10 03 86 Page 3 6 Checked by Edition 01 03 1999 Reg Number I...

Page 13: ...t temperature vapor locks may occur These create a severe power loss In some aircraft it may be possible that the pilot may not ob serve any indication of this during taxiing and the take off run The operating manual of the air craft must contain an indication of this fact The probability of vapor locks is minimized if the instructions on the connection diagram are followed The electrical fuel pum...

Page 14: ...anical fuel pump P2 Electrical fuel pump T1 Fuel tank T2 Tank vent S1 Fuel pressure indicator optional V1 Carburetor V2 Carburetor only twin carb models V3 Fuel cock W1 Firewall 4 1 1 2 Carburetor System LIMBACH engines in general are equipped with constant de pression carburetors Therefore the pressure of the intake air must be at the same level as the air pressure for the float cham bers ventila...

Page 15: ...nt to en sure the function of the carbure tor Check the air filter flange of the carburetor and make sure that the openings are not cov ered with the gasket Flugmotoren 4 Prepared by J B Meyer Replaces edition from 10 03 86 Page 4 3 Checked by Edition 01 03 1999 Reg Number Installation Manual L 1700 L2000 and L 2400 Series Fig 4 3 Sample Carburetor Preheat System L 2000 EB1AA Twin Carburetor Serie...

Page 16: ...to be compati ble with the type of fuel used Suitable fuel lines are available on request 4 1 2 2 Description Fuel is supplied to the injection nozzles F1 F4 by a loop circuit which prevents the formation of gas bubbles The tank s T1 also provides the function of the radiator1 The fuel flows from the tanks to the active pump P1 or P2 from the pump to the filters F1 F4 to the injection nozzles Flug...

Page 17: ... to cylinder banks Engine L2 Fuel line Return to fuel pressure regulator Engine to firewall L3 Fuel line Pressure line from pump s Firewall engine P1 P2 Fuel pumps electrically driven main and auxiliary system Firewall airframe S1 Fuel pressure sensor connect between cross over line and pressure regulator firewall V1 V3 Shut off valve s main fuel feed auxiliary and return lines if specified Airfra...

Page 18: ...ilable on request Observe the wiring diagram Recommended figures for the battery capacity are 12V 28Ah and a cross section for the starter cable 16mm According to your installation these figures may vary considerably Flugmotoren 5 Prepared by J B Meyer Replaces edition from 10 03 86 Page 5 1 Checked by Edition 01 03 1999 Reg Number Installation Manual L 1700 L2000 and L 2400 Series GND 31b G2 G3 N...

Page 19: ...r similar to the conventional engines that most pilots may be familiar with a back up system is essential This is provided by the emergency switch and the relay box MCU It should ensure a supply of the electrical power for the engine function for a minimum period of twenty minutes after the loss of power from the main electrical system The emergency switch is included in the circuit in case the fu...

Page 20: ...ren Installation Manual L 1700 L 2000 and L 2400 Series 5 Prepared by J B Meyer Replaces edition from 10 03 86 Page 5 3 Checked by Edition 01 03 1999 Reg Number Fig 5 2 Block Diagram L 2400 EF Electrical System ...

Page 21: ... switch which is mounted in the instrument panel by the plug X6 The fuel pumps are connected by the plug X9 A reliable ON OFF switch for the engine electrical power is mounted in the instrument panel and is connected by the contacts provided to the plug X7 The LED s for the status of the emergency are connected to the plug X7 if instrument 250 215 025 000 is not used The plug X7 also pro vides fur...

Page 22: ...53 mm 170 215 100 000 Oil Pressure 53 mm 170 215 110 000 Water temperature EGT Water loss warning lamp combination instrument 57 mm 250 215 020 000 Status Indicator engine hour counter and warning LED s fuel pressure discharging emergency batt charging emergency batt 57 mm 250 215 025 000 RPM indicator operating with the engine s inductive sensors 80 mm 250 215 002 000 RPM indicator type W from VD...

Page 23: ... 9 Pin connector RPM indicator 250 215 001 000 Pin Destination 1 12 V 2 12 V 3 Input Sensor 6 Input Sensor GND Flugmotoren 5 Prepared by J B Meyer Replaces edition from 10 03 86 Page 5 6 Checked by Edition 01 03 1999 Reg Number Installation Manual L 1700 L2000 and L 2400 Series 0 5 10 15 20 25 30 35 40 x100 Fig 5 3 RPM indicator 250 215 001 000 O R Fig 5 4 RPM indicator 250 215 001 000 000 rear vi...

Page 24: ... rpm with an optical tachometer at approximately 2 3 max engine rpm and adjust the screw S 5 3 3 4 Oil pressure and oil temperature 250 215 010 000 Pin Destination 1 12 V 2 12 V Light 3 GND 4 Sensor temperature VDO 5 GND 6 Sensor pressure 0 10 bar VDO 7 GND Flugmotoren 5 Prepared by J B Meyer Replaces edition from 10 03 86 Page 5 7 Checked by Edition 01 03 1999 Reg Number Installation Manual L 170...

Page 25: ...sor EGT 6 Sensor EGT 7 GND 8 LED 9 LED Flugmotoren 5 Prepared by J B Meyer Replaces edition from 10 03 86 Page 5 8 Checked by Edition 01 03 1999 Reg Number Installation Manual L 1700 L2000 and L 2400 Series Fig 5 10 Oil Pressure and Temperature Indicator W E L Fig 5 11 EGT Coolant Temp and Coolant Level Indicator LFSD RFSD LO Fig 5 12 Rear View Dual Indicator Instruments ...

Page 26: ...nts Panel The cockpit instruments are connected to plug X7 on the cable loom ECU Connector Pin Destination Comment Instrument P N X7 1 engine hour counter 250 215 025 000 X7 6 switch S3 then to GND engine electrics ON OFF X7 7 yellow LED emergency batt charging 250 215 025 000 X7 8 red LED emergency batt discharging 250 215 025 000 X7 10 RPM indicator 250 215 001 000 X7 11 RPM indicator 250 215 00...

Page 27: ...IRING DIAGRAM Sign Description Position Part No B1 Sender oil temperature attached to the engine B2 Sender oil pressure attached to the engine B3 Sender fuel quantity selection of the designer selection of the designer B4 B5 B7 Sender CHT cylinder head 170 215 010 000 E1 E4 Spark plug attached to engine F1 Main circuit breaker 25A ETA 2 5700 K12 25A or ETA 2 5700 K12 55A F2 Gen circuit breaker 20A...

Page 28: ...hed to the engine Y1 Fuel pump electric 170 090 010 000 Z1 Condenser attached to the engine Z2 optional Filter radio suppression Bosch 0 290 801 001 5 4 2 L 2400 EF Engine BILL OF MATERIALS FOR THE WIRING DIAGRAM Sign Description Position Part No B1 B2 Sender RPM attached to the engine B3 Sender throttle position attached to the engine B4 Sender air pressure mounted behind firewall B5 Sender air t...

Page 29: ...nfu sion and complication used in other forms of drafting For example a square is divided into two sections the upper section states X4 and the lower 20 This indicates that a cable is connected to the terminal pin 20 of component X4 This is identified from the component list In the normal operating mode the engine receives the electrical power from the main battery G1 The circuit energizes thru th...

Page 30: ...ised to become familiar with particular details of this system With the magneto ignition system it is instinctive to open the main switch to run the engine This system is designed so that when the main switch is in the OPEN position the electrical power is OFF The main switch is in the cockpit The main battery should be switchable over a main relay main switch e g Kissling 12V 50A order number 26 ...

Page 31: ... vibra tion load is not defined but must be taken into account in the design factor Caution Loads imposed on the mountings through the bend moment must not exceed that recom mended by the manufacturer The engine mount bolts may not be subjected to bend or shear loads LIMBACH Flugmotoren recommend the use a tubular structure to mount the engine to the air frame The tubes are set at a low angle of i...

Page 32: ...ue to in creased requirements to reduce the noise levels a muffler is recommended The use of ball socket spring connections to the pipe pot connections makes the installation easier Move ment of the engine must be taken into account Dimensioned Drawings are available from LIMBACH Flugmotoren under the following refer ences Dwg No Description 000 173 001 000 Exhaust System Design Requirements 000 1...

Page 33: ...Clamps e g on the oil filter should be easily accessible for maintenance Flugmotoren 7 Prepared by J B Meyer Replaces edition from 10 03 86 Page 7 2 Checked by Edition 01 03 1999 Reg Number Installation Manual L 1700 L2000 and L 2400 Series Fig 7 2 Supplementary Silencer Fig 7 3 Dual Header Exhaust System Courtesy RSA France ...

Page 34: ...the pipes carrying inflammable liquid More detailed information regarding the exhaust system can be obtained from LIMBACH Flugmotoren A spoiler at the exhaust outlet will avoid catching pressure air which would decrease the effi ciency of the cooling system 7 2 L 2400 EF The exhaust system of the L 2400 EF engine differs from the exhaust system of the air cooled L 2400 EB1 engine in the connection...

Page 35: ...2 L 160BT avoid full power over 3000rpm Hoffmann HO 11 or HO 11A fixed pitch Mühlbauer MT 1 fixed pitch The Operating Manual for the aircraft must contain the limitations for the type of propeller used The release of a new propeller does imply that existing aircraft may be retrofitted with the new propeller For further information contact the aircraft or engine manufacturer 8 1 1 L 2400 EF Engine ...

Page 36: ...on to the vibration of the rotating system This consists of the propeller the spinner assy the crankshaft and the starter ring gear Verify the suitability of a propeller by vi bration measurements The data on the maximum tolerable vibration level is not yet available Conduct a vibration test for the engine propeller combinations which are not yet released For further information contact the engine...

Page 37: ...n the shape of a shark s mouth for the radiator at the bottom of the cowling inlet for the engine intake air NACA inlet An accumulator with an air intake arch and an air filter is mounted on the engine The air filter sits in a container 10 2 0 2 Air Ducting The container for the air filter is attached to either the engine mount or the cowling and should be sealed at the cowling as good as possible...

Page 38: ...t Make sure that the outlet is not blocked e g by the muffler 10 3 Engine Breather LIMBACH engines are wet sump forced lubricated Therefore it is necessary to assure a proper crankcase breathing Never give pressure air to the crankcase breather line Be sure that icing is impossible For more information see Operating and Maintenance Manual of the engine Warning A blocked breather line will cause oi...

Page 39: ...s Tony Firewall Forward Engine Installation Methods 1983 Available through EAA Experimental Aircraft Association Miley S J Cross E J An Experimental Investigation of the Aerodynamics and Cooling of a Horizontally Opposed Air Cooled Aircraft Engine Installation NASA Contractor Report 3405 Flugmotoren 11 Prepared by J B Meyer Replaces edition from 10 03 86 Page 11 1 Checked by Edition 01 03 1999 Reg...

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