DLE-55 Single Cylinder Two Stroke Side 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: 5.5HP/8500 rpm Idle Speed: 1500?rmp/min Static Thrust: 14.5 kg/100?meters Altitude Static Thrust: 12.8 kg/1800?meters Altitude Recommended Propeller: 22 x8, 22 x10, 23 x8, 23 x10 Spark Plug Type: NGK CM6 Displacement: 55.6 cm3 Diameter 髑?Stroke: 45 mm髑?5 mm Compression Ratio: 7.6: 1 Lubrication Ratio: 30: 1 Weight of Main Engine: 1330 g Weight of Exhaust: 140 g Weight of Ignition: 140 g Ignition voltage: 4.8V-8.4VA pplications:Fit For High-Performance Large-Scale RC Aircraft