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Limbach Engines, Flugmotoren

Limbach Flugmotoren

Limbach Flugmotoren GmbH & Co. KG from Germany (EU) have been successfully building aircraft engines for over 30 years and built almost 6000 engines that have flown millions of hours and support their product with service centers world wide. It is safe to say that they have proven themselves as a reliable manufacturer with a very good product.

Their engine range falls into three major categories: low powered up to 40 kW, medium powered to 75 kW and high powered from 75 to 125 kW. They can be used in JAR-VLA, experimental and ultralight class aircraft. Some have been installed in unmanned aircraft too.

Limbach design

These engines all have a number of features in common: they are four stroke, horizontally opposed, have a solid state magneto or electronic fuel injection and ignition, without mixture control, no choke and no carburetor heat control. Some low powered models are two stroke and have two cylinders and turbo's are used on some of the higher powered models.

Most engines are air cooled but the higher end models have liquid cooling, this will add to the weight of the engine installation. Shock cooling will be a thing of the past with a liquid cooling system, so that is a real advantage here.

Low power

Limbach Engines, Flugmotoren, L550E

These are the only two stroke engines from Limbach, power ranging from 15 to 40 kW and to date Limbach has two models: L275E and the L550E. They are to be used in small very light aircraft. You will need a gearbox to reduce the engine RPM of 7200 down to a more propeller friendly RPM.

Medium power

Most of the models are in this range (seven) and RPM at full power is around 3200. You will not need a gearbox but the propeller will be limited in diameter to prevent the tips becoming too noisy on takeoff. Cylinder displacement varies from 1700 cm3 up to 2400 cm3.

Limbach Engines, Flugmotoren, L550E


Engine weight in this category varies from 69 up to 82 kg and cylinder displacement from 1700 to 2400 cm3. There is no turbo available on these models. The only engine with a dual ignition and liquid cooling is the L 2400 DFi/EFi, it has a dry weight of 76 kg and power is 100 hp. And the only one which could compete with Rotax. All others have a single magneto ignition and are air cooled.

Note that these engines are somewhat bigger than your average Rotax 912S. Fuel consumption of this engine range is around 10 to 15 liters per hour.

High power

Limbach Engines, Flugmotoren, L550E

In this range Limbach offers a certified model the L 2400DT/ET, a 96 kW (130 hp) liquid cooled turbocharged engine. For the experimental aircraft they have a more powerful model, the L 2400 DT.X which delivers some 118 kW / 160 hp, and is also turbocharged.

The L 2400 DT.X is ideal for two to four place homebuilt kit aircraft weighing up to 1800 lbs. Its turbo promises sustained power to altitudes of at least 10000 feet.

Expect the fuel consumption to be around 255 g/kWh (WOT or take off) and 240 g/kWh when flying partly open throttle for these two types.

Fuel type

All Limbach engines are capable of running on Mogas 98 RON (unleaded) or AVgas 100LL. The two stroke models will require special oil to be mixed in the fuel in the correct ratio to lubricate the engine internals.


Limbach has service centers throughout the world where engineers familiar with the models are capable of keeping your engine running reliably for a long time to come.

Written by EAI.

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