DLE-60 Twin Cylinder Two Stroke Side Exhaust Gas Engine for Large-Scale RC Aircraft and Unmanned Aerial Vehicles Condition: New Note: This 100% part is non-returnable and non-exchangeable. Please verify the correct part number before purchasing, instead of solely relying on the model.Specification:Performance: 7HP/8500 rpm Idle Speed: 1400 rmp/min Static Thrust: 15.2 kg/100 meters Altitude Static Thrust: 13.5 kg/1800 meters Altitude Recommended Propeller: 22 x10, 23 x8, 23 x10, 24 x8 Spark Plug Type: NGK CM6 Displacement: 61 cm3 Diameter 髑?Stroke: 36 mm髑?0 mm Compression Ratio: 7.6: 1 Lubrication Ratio: 30: 1 Weight of Main Engine: 1560 g Weight of Exhaust: 200 g Weight of Ignition: 190 g Ignition voltage: 4.8V-8.4VA pplications:Fit For Large-Scale RC Aircraft and Unmanned Aerial Vehicles