Heavy Fuel, Gasoline Engines & Wankel Rotary UAV Engines
SP-56 ROS Two Stroke Engine Two-Cylinder UAV engine
SP-56 ROS Two Stroke Engine

Two-Cylinder UAV engine

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SP-56 ROS Two Stroke Engine

The 2-stroke single cylinder SP-56 TS ROS with 56 ccm and rear output shaft is the smallest dual cylinder engine in the Sky Power portfolio. It is also the newest, forged using the proven SP-28 parts. The engine is used by customers in small heli config UAS as well as fixed wing platforms.

The Sky Power SP-56 TS ROS is equipped with a carburetor and an improved cylinder design for a higher thermal stability. The generator can be mounted on the rear output shaft. The engine is equipped in the standard configuration with 1 spark plug per cylinder due to the compact size. The dual cylinder boxer style offers a low vibration power dense two stroke for below 77lbs or up to 35kg.

Type 2-Cylinder Gas Engine
Capacity 56 ccm / 3.42 cu in
Power 4.6 HP / 3.4 KW @ 7000 RPM
Speed Range 2200 – 10000 RPM
Weight incl. ignition 5.54 lbs (2.52 kg)
Crankshaft 4 ball bearings
Oil/Gasoline ratio 1:50 / 2% mix
Operating Voltage 6 – 8.4 V DC
Bore diameter 1.42 inch (36.00 mm)
Stroke 1.10 inch (28.00 mm)
Torque 4.6 Nm @ 6500 RPM