O.S. Engine 70SZ-H Ring 3D Heli Engine  [OSMG1972]

You would like MORE capacity to provide your .60-size helicopter more authority in challenging maneuvers. You don't want to accept time-consuming mounting alterations and gearing modifications.
O.S. has the solution: the 70SZ-H. It installs in the same room as a .61, and operates in practically the exact same rpm band...so it is possible to upgrade immediately, and straight away enjoy additional muscle mass for 3D flying and FAI F3C competition.

Particularly developed to meet the performance demands of FAI F3C competition pilots.

Throttle construction reference marks make it simple to note and restore finely tuned settings after upkeep.

Additional mounting lug on front side of crankcase increases security during extreme maneuvers.

Front and back ball bearing suppported crankshaft decreases friction and wear.

Three-needle carburetor permits exceptionally exact adjustments.

Large helicopter cylinder mind provides good cooling fin area?Xincreased webbing regarding crankcase front side improves temperature dissipation even more.

SPECS

• 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)
• Practical rpm: 2,000-18,000
• Production: 2.5 hp @ 16,000 rpm
• Body weight w/o Muffler: 19.5 oz (553.5 g)
• Needs: Muffler & gas