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O.S. .70 SZ-H Ringed Heli
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Item Number: OSMG1972
Manufacturer: os engine
Manufacturer Part No: OSMG1972
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You want MORE POWER to give your .60-size helicopter more authority in challenging maneuvers. You don't want to take on time-consuming mounting modifications and gearing changes.
O.S. has the answer: the .70 SZ-H. It installs in the same space as a .61, and operates in virtually the same rpm band...so you can upgrade in an instant, and right away enjoy extra muscle for 3D flying and FAI F3C competition.
- Specifically developed to satisfy the performance demands of FAI F3C competition pilots.
- Throttle assembly reference marks make it easy to note and restore finely tuned settings after maintenance.
- Additional mounting lug on front of crankcase increases stability during extreme maneuvers.
- Front and rear ball bearing suppported crankshaft reduces friction and wear.
- Three-needle carburetor permits exceptionally precise adjustments.
- Large helicopter cylinder head offers generous cooling fin area—increased webbing on the crankcase front improves heat dissipation even further.
Specifications:
- Stock Number: OSMG1972
- Displacement: 0.702 cu in (11.5 cc)
- Bore: 1.016 in (25.8 mm)
- Stroke: 0.866 in (22.0 mm)
- Output: 2.5 hp @ 16,000 rpm
- RPM Range: 2,000-18,000
- Weight w/o Muffler: 19.5 oz (553.5 g)
- Requires: Muffler & fuel
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When purchasing an RC boat,
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