The SP-55 FI TS ROS is an innovative single-cylinder two-stroke engine developed by Sky Power International with an integrated fuel injection system and a displacement of 55 cm³. The engine is characterized by its compact design and advanced technology, which makes it particularly suitable for use in unmanned aerial vehicles (UAVs).

With an output of 4.1 hp (3.0 kW) at 7000 rpm and a torque of 4.8 Nm at 5500 rpm, the SP-55 FI TS ROS offers outstanding performance. The engine has a speed range of 2200 to 8000 rpm and weighs just 2.76 kg (without additional components). The bore diameter is 45.00 mm, and the stroke is 35.00 mm. The operating voltage is between 12 and 15 V DC.

A special highlight of the SP-55 FI TS ROS is the integrated fuel injection system, which ensures precise fuel dosage and efficient operation. The dual ignition provides additional reliability and operational safety. Another unique feature is the rear output shaft, which allows a generator or starter-generator to be mounted directly on the engine. This makes the SP-55 FI TS ROS particularly suitable for hybrid applications where electrical energy has to be generated on board.

Thanks to its compact dimensions and low weight, the SP-55 FI TS ROS is ideal for a range of UAV platforms, including fixed-wing aircraft, helicopters and VTOL systems. This engine is particularly suitable for the class of unmanned aerial vehicles with a take-off weight of up to 25 kg. The option of connecting a generator extends the range of applications to hybrid configurations that require the power of both combustion and electric engines.

The compact design of the engine, combined with the side-mounted fuel injection system and rear output shaft, makes the SP-55 FI TS ROS one of the most efficient single-cylinder engines on the market. High reliability is ensured by the double ignition and the use of high-quality components. The engine’s flexibility is demonstrated by its versatility and adaptability to different mission requirements. The fuel injection system optimizes fuel consumption and increases engine performance.

Sky Power International offers a range of options for the SP-55 FI TS ROS, including a starter generator and controller for applications requiring electric start or additional power generation. In addition, the engine can be pre-run on request to ensure immediate readiness for use.