Two Stroke Engine SP-55 TS ROS

The 2-stroke single cylinder 3W-International SP-55 TS ROS with 55 ccm is the largest single cylinder engine in our lineup and well known by industry veterans for its robustness and longevity for many years. The 3W-International SP-55 TS ROS is equipped in the standard configuration with 2 sparkplugs per cylinder as well as a rear output shaft (ROS) for additional equipment mounting. The engine is used by customers for fixed wing, heli and VTOL aircraft on the upper end of the “below 55 lb” or “up to 25 kg” class UASs as well as hybrid configurations to produce electricity. The 3W-International SP-55 TS ROS engine is equipped in the standard configuration with a twin ignition unit. The carburetor is top mounted.

The cylinder is casted aluminum and have been manufactured in it’s current form for over a decade. The Crankcase is CNC machined in order to be able to adjust customer specific parts to it.

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