A 3.5cc engine. The last modern advances were used in the design and today this type of motor is actively used by the best world sportsmen and Russian athletes. It is intended for radio-controlled model cars of F-1 and F-2 class. It is two-stroke with resonance system exhaust, 8-channel vent with 2 additional windows. Crankshaft diameter 14 mm, cylinder diameter 19.4 mm, carburetor mixer chamber diameter 8.7 mm.