DLE-170 Twin Cylinder Two Stroke Side Exhaust Gas Engine for High-Performance RC Aircraft and Model Aviation 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: 17.5HP/7500 rpm Idle Speed: 1100 rmp/min Static Thrust: 35 kg/100 meters Altitude Static Thrust: 31.5 kg/1800 meters Altitude Recommended Propeller: 30 x12, 32 x10 Spark Plug Type: NGK CM6 Displacement: 170 cm3 Diameter 髑?Stroke: 52 mm髑?0 mm Compression Ratio: 9.5髢?Lubrication Ratio: 30:1 Weight of Main Engine: 3620 g Weight of Exhaust: 470 g Weight of Ignition: 190 g Ignition voltage: 4.8V-8.4VA pplications:Fit For High-Performance RC Aircraft and Model Aviation