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For tight airplane cowls, a rear exhaust setup makes all the difference. The DLE20RA offers the performance of the DLE-20, but with performance perks like a redesigned muffler, lighter piston, and updated electronic ignition unit. Even before your first run, the DLE20RA is ideal - it installs easily thanks to beam mounting and its rear exhaust setup. Electronic ignition gives you a sure-fire start every time and, once you're in the air, the pumper carb delivers consistent, reliable fuel flow through the craziest acrobatics. Add in the "extras" that DLE gives you - gasket, bolts, throttle arm extension, exhaust extensions, muffler, spark plug, manual, and more - and it's no surprise DLE is one of the highest rated model airplane engine manufacturers in the world. Specifications: Stock Number: DLEG0420 Displacement: 20.0 cc (1.22 cu in) Bore: 1.26 in (32 mm) Stroke: 0.98 in (25 mm) Weight Engine: 1.46 lb (660 g) Muffler: 2.8 oz (80 g) Ignition Module: 4.6 oz (130 g) Total: Weight: 1.92 lb (870 g) RPM Range: 1,700-9,000 Output: 2.5 hp @ 9,000 rpm Requires: unleaded gasoline, 2-cycle oil, ignition battery, and propeller Includes: electronic ignition module, muffler, spark plug, manual, gasket, bolts, throttle arm extension, and two exhaust extensions Suggested Propellers: 14x10, 15x8, 16x6, 16x8, and 17x6 Suggested Break-in Prop: N/A Technical Data: Ignition Battery: 4.8-8.4 NiCd or NiMH, 6.6V LiFe or 2S LiPo pack (Voltage regulator required if LiPo or LiFe pack is used) Gasoline/Oil Mix: 30:1 Replacement Spark Plug: DLEG2326 Static Thrust: 13.88 lb (6.3 kg) @ 328 ft (100 m) altitude; 12.34 lb (5.6 kg) @ 5,900 ft (1800 m) altitude Recommended Products: HCAM6416 Hobbico LiFeSource 6.6V 1100mAh 10C LiFe Pack XOAQ1608 Xoar PJA 16x8 Beechwood Propeller Recommended Options: DLEG2326 DLE CM6 Spark Plug FPWP2212 FlightPower FP25 7.4V 2100mAh LiPo Battery w/Star Plug HCAM6351 Hobbico HydriMax Ultra 6V 2000mAh NiMH Pack FPWM0290 FlightPower 5A Voltage Regular (if LiPo or LiFe pack is used) XOAQ1606 Xoar PJA 16x6 Beechwood Propeller XOAQ1706 Xoar PJA 17x6 Beechwood Propeller