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 |
