Heavy Fuel and Gasoline Engines for Unmanned Aerial Systems
SP-56 ROS Two Stroke Engine Two-cylinder UAS engine
SP-56 ROS Two Stroke Engine

Two-cylinder UAS 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.

The engine 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.

Forged from the proven SP-28 parts, the SP-56 TS ROS is equipped in the standard configuration with 1 sparkplug per cylinder due to the compact size.

The dual cylinder boxer style offers a low vibration power dense two stroke for the ‘below 77lbs’ or ‘up to 35kg’ category. It can be used in small heli configuration UAS as well as fixed wing platforms.

The cylinder is casted aluminum and the crankcase is CNC machined in order to be able to adjust to customer specific requirements or mounting plate.

The following additional configurations can be offered:

  • Generator and Controller
  • Starter Generator and Controller
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