R$ 
G$ 
Specification:
- Performance : 21.5HP/7500rpm
- Idle Speed : 1000 rmp/min
- Static Thrust : 51kg/100 meters Altitude
- Static Thrust : 44.6kg/1800meters Altitude
- Recommended Propeller : 32×10 ; 32×12 ; 34×10 ;
- Spark Plug Type : CM6
- Displacement : 222.5cm3
- Diameter × Stroke : 45mm×35mm
- Compression Ratio : 7.6：1
- Lubrication Ratio : 30:1
- Weight of Main Engine : 4860g
- Weight of Exhaust : 470g
- Weight of Ignition : 380g
- Ignition voltage: 6V-8.4V
