The 2-stroke single cylinder SP-28 CR with 28 ccm is the longest standing engine in our lineup and well known by industry veterans for its robustness and longevity for many years. The Sky Power SP-28 CR is still our most requested system and particularly suited for fixed wing aircraft on the upper end of the “below 55 lb” or “up to 25 kg” class UASs. The 3W-International SP-28 CR engine is equipped in the standard configuration with one spark plug and a single ignition unit. The carburetor is rear (CR) mounted.
The cylinder and crankcase are casted aluminum and have been manufactured in it’s current form for over a decade.
- The carbureted version is the lightest and most robust engine in its class.
- The carburetor adjusts automatically to the engine and environmental conditions.
- Customers fly up to 24-28 hours with this configuration.
|Type||1-Cylinder Gas Engine|
|Capacity||28 ccm / 1.71 cu in|
|Power||2.2 HP / 1.6 KW|
|Speed Range||2500 – 10000 RPM|
|Weight||2.95 lbs (1.34 kg) incl. ignition|
|Crankshaft||3 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||2.3 Nm @ 6600 RPM|