Heavy Fuel and Gasoline Engines for Unmanned Aerial Systems
SP-56 Two Stroke Engine (exhaust at the top) Two-cylinder UAS engine
SP-56 Two Stroke Engine (exhaust at the top)

Two-cylinder UAS engine

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SP-56 Two Stroke Engine (exhaust at the top)

The two-stroke dual cylinder SP-56 TS ROS with 56 ccm and rear output shaft is the smallest dual cylinder engine in the Sky Power portfolio.

Forged using 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 below 77lbs or up to 35kg. The generator can be mounted on the rear output shaft.

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 engine is used by customers in small heli config UAS as well as fixed wing platforms.

The following additional configurations can be offered:

  • No rear output shaft
  • Rear output shaft
  • 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