DLE-20RA Single Cylinder Two Stroke Rear Exhaust Gas Engine for High-Performance 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: 2.5HP/9000 rpm Idle Speed: 1750 rmp/min Static Thrust: 6.3 kg/100?meters Altitude Static Thrust: 5.6 kg/1800?meters Altitude Recommended Propeller: 14 x10, 15 x8, 16 x6, 17 x6 Spark Plug Type: NGK CM6 Displacement: 20 cm3 Diameter 髑?Stroke: 32 mm髑?5 mm Compression Ratio: 10.5: 1 Lubrication Ratio: 30:1 Weight of Main Engine: 660 g Weight of Exhaust: 80 g Weight of Ignition: 140 g Ignition voltage: 4.8V-8.4VA pplications:Fit For High-Performance Large-Scale RC Aircraft