DLE-222 4 Cylinder Gas Engine for High-Performance Model Aviation and Large-Scale RC Aircraft 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: 21.5HP/7500 rpm Idle Speed: 1000 rmp/min Static Thrust: 51 kg/100 meters Altitude Static Thrust: 44.6 kg/1800 meters Altitude Recommended Propeller: 32髑?0, 32髑?2, 34髑?0 Spark Plug Type: CM6 Displacement: 222.5 cm3 Diameter 髑?Stroke: 45 mm髑?5 mm Compression Ratio: 7.6髢?Lubrication Ratio: 30:1 Weight of Main Engine: 4860 g Weight of Exhaust: 470 g Weight of Ignition: 380 g Ignition voltage: 6V-8.4VA pplications:Fit For High-Performance Model Aviation and Large-Scale RC Aircraft