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A ¡§Hyper¡¨ engine for superior heli performance! For over-the-top flying excitement, the .50 SX-H Ringed Hyper engine is the clear favorite! The Hyper version weighs less than the .50 SX-H, but delivers more horsepower for higher rotor speeds. Actually mounts in the same space as a .30-size application. The 60LH carburetor features 1.5 mm more bore, to increase overall power. SPECIFICATIONS Stock Number: OSMG1951 Displacement: 0.499 cu in (8.17 cc) Bore: 0.866 in (22 mm) Stroke: 0.847 in (21.5 mm) Practical rpm range: 2,000-20,000 Output:1.9 hp @ 17,000 rpm Weight: 14.3 oz (406 g) Includes: 60LH carburetor, #8 glow plug Requires: muffler, drive hub