Description
Versatile and Efficient, The Advanced Design of the Limbach Engine L550EF
The Limbach Engine L550EF is a compact, high-performance, two-cycle engine designed for UAVs and light aircraft applications. This UAV Engine is equipped with an electronic engine management system and automatic altitude compensation, the L550EF delivers consistent power and efficiency at various altitudes, making it an excellent choice for demanding aviation applications.
Key Specifications:
- Power Output: 50 HP at 7000 RPM, providing reliable, high-performance power for diverse UAV and light aircraft applications
- Engine Type: Four-cylinder, horizontally opposed, air-cooled, two-stroke engine with mixture lubrication
- Bore and Stroke: 66 mm (2.60 in) bore and 40 mm (1.57 in) stroke for a balanced performance
- Displacement: 548 cm³ (33.44 cubic inches) to deliver a powerful thrust-to-weight ratio
- Weight: Lightweight at 15 kg, maximizing aircraft agility and endurance
- Crankcase: Durable, die-cast aluminum
- Crankshaft: Seven-piece assembled design for reliable, long-term performance
- Pistons: Casted aluminum alloy for efficient, lightweight operation
- Cylinders: Cast aluminum with silicone carbide-coated barrel, enhancing wear resistance
- Timing: ECU-controlled variable timing for optimized performance across varying RPM and altitude
- Engine Management System: Computer-controlled 12V system with automatic altitude compensation
- Fuel Compatibility: Runs on 90-octane gasoline, mixed with synthetic two-cycle oil at a 50:1 ratio
- Starter (Optional): 12V starter available for easy ignition
- Generator (Optional): 12V or 14V generator available for additional power needs
The Limbach L550EF’s advanced electronic management and altitude compensation provide seamless operation in changing environments. This engine is particularly suited for UAV operators and aviators seeking a lightweight, powerful engine with modern control features and consistent performance.



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Specifications
Specifications of Limbach Engine L550EF
Performance |
50 HP at 7000 rpm |
Bore |
66 mm / 2.60 inch |
Stroke |
40 mm / 1.57 inch |
Displacement |
548 cm3 (33.44 cu. inches) |
Weight |
15 kg |
Crankcase |
Aluminium, die casted |
Crankshaft |
seven piece assembled |
Pistons |
casted aluminum alloy |
Cylinders |
Casted aluminum, silicone carbide coated barrel |
Timing |
variable (ECU-controlled) |
Engine management system |
12V, computer controlled |
Altitude compensation |
Automatic via ECU |
Fuel |
90 octane (regular) gasoline, mixed with synthetic two-cycle oil to the ratio of 50:1 |
Starter |
12V optional |
Generator |
12/14V optional |
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