Versatile and Efficient, The Advanced Design of the Limbach Engine L550E The Limbach Engine L550E is a lightweight and reliable four-cylinder, air-cooled engine designed for UAVs and light aircraft applications. This UAV Engine features a compact, horizontally opposed design and versatile compatibility making it ideal for pusher and tractor configurations, providing efficient, high-powered performance with minimal maintenance requirements. Key Specifications: Power Output: 37 kW (50 HP) at 7500 RPM, delivering a high power-to-weight ratio for versatile 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 Displacement: 548 cm³ (33.44 cubic inches) for optimized power and fuel efficiency Crankcase: Made from durable aluminum casting Crankshaft: Drop-forged, seven-piece design for durability and reliability Pistons: Cam-ground, cast aluminum alloy for efficient operation Cylinders: Cast aluminum with silicone carbide-coated barrel for enhanced wear resistance Ignition System: Solid-state magneto ignition with shielded ignition option available Firing Order: Two opposing cylinders fire simultaneously with a 180-degree offset for balanced operation Carburetors: Equipped with four diaphragm all-position carburetors for consistent fuel delivery Weight: Dry weight approximately 16 kg, keeping aircraft light without sacrificing power Fuel Compatibility: Compatible with AVGAS 100LL or 90 RON fuel, mixed with oil at 1:25 or 1:50 (synthetic oil preferred) Optional Equipment: Additional heat sinks for cylinders (+1.2 kg), shielded ignition system, 24V starter (0.3 kW), 28V generator (1200W), and exhaust stacks The Limbach L550E engine provides reliable power with low maintenance requirements, making it an excellent choice for UAVs and light aircraft applications that demand a balance of performance, durability, and adaptability. L550E Engine Specifications Parameter Value Engine Type 4-Cylinder UAV Engine Model Limbach L550E Power Output 50 HP (approx.) Weight ~55 kg Application Fixed-wing UAVs, Drones Why Choose the UAV Engine Limbach L550E Four-Cylinder? The UAV Engine Limbach L550E four-cylinder is specifically engineered for demanding drone and UAV applications where performance, reliability, and lightweight design are critical. Thanks to its horizontally opposed four-cylinder configuration, this engine delivers smooth operation, balanced power delivery, and reduced vibration compared to conventional two-cylinder UAV engines. With its proven track record in professional UAV missions, the Limbach L550E four-cylinder engine stands out as a trusted solution for endurance, efficiency, and integration flexibility in both fixed-wing and VTOL UAVs. L550E Price and Availability Looking for Limbach L550E for sale ? Contact Kratos Defense Drone Shop for the latest L550E engine price , international shipping, and technical support for UAV integration. Need more efficiency and modern technology? The L550EF comes with an advanced fuel injection system for optimized performance. For a comprehensive reading of related products, please visit the Kratos Defense Drone Shop website. Limbach L550E Engine – FAQ 1. What are the key technical specifications of the L550E? The Limbach L550E is a four-cylinder, horizontally opposed, air-cooled two-stroke engine designed for UAVs and light aircraft. It delivers 37 kW (50 horsepower) at 7,500 rpm and has a displacement of 548 cm³ . The engine features a bore of 66 mm and a stroke of 40 mm , optimized for high efficiency and power-to-weight performance. Its dry weight is approximately 16 kilograms , making it ideal for medium and large UAV platforms. 2. What materials and components are used in its construction? The L550E features an aluminum alloy crankcase , a drop-forged seven-piece crankshaft , and cam-ground aluminum alloy pistons . The cylinders are cast aluminum with silicon carbide-coated barrels for enhanced wear resistance and longer operational life. This design ensures high strength, low vibration, and long-term reliability in continuous operation. 3. What ignition and fuel systems are integrated? The engine utilizes a solid-state magneto ignition system with an optional shielded ignition setup for EMI-sensitive applications. It operates on AVGAS 100LL or 90 RON fuel , mixed with oil at a 1:25 or 1:50 ratio (synthetic oil recommended). Four diaphragm-type all-position carburetors ensure uniform fuel delivery across varying flight attitudes. 4. What performance and configuration options are available? The L550E can be configured for both pusher and tractor installations . Optional accessories include heat sinks for cylinders (+1.2 kg) , a 24V starter (0.3 kW) , a 28V generator (1.2 kW) , and shielded ignition wiring for specialized UAV applications. These options allow users to tailor the engine for endurance, redundancy, or electrical power output needs. 5. What are the available purchasing and payment methods? The L550E is priced between 17,300 and 20,170 USD , depending on configuration and included accessories. Kratos Defense Drone Shop accepts bank transfer, PayPal, and major credit cards for retail or enterprise purchases. Bulk and OEM orders can be negotiated directly based on integration requirements. 6. What documentation and compliance materials are provided? Each engine is delivered with technical manuals, performance charts, installation guides, and maintenance documentation . The L550E meets civilian UAV export compliance standards and is approved for commercial and research applications only . Use for military or warfare purposes is strictly prohibited. Kratos Defense Drone Shop provides after-sales technical assistance and spare part support to ensure long-term operational reliability.
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