DLE-35RA Single Cylinder Two Stroke 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: 4.1HP/8500 rpm Idle Speed: 1500?rmp/min Static Thrust: 9 kg/100?meters Altitude Static Thrust: 7.8 kg/1800?meters Altitude Recommended Propeller: 18 x10, 19 x8, 20 x8, 20 x10 Spark Plug Type: NGK CM6 Displacement: 34.9 cm3 Diameter 髑?Stroke: 38.5 mm髑?0 mm Compression Ratio: 7.6: 1 Lubrication Ratio: 30: 1 Weight of Main Engine: 930 g Weight of Exhaust: 120 g Weight of Ignition: 140 g Ignition voltage: 4.8V-8.4VA pplications:Fit For High-Performance Large-Scale RC Aircraft