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

you'll need MORE capability to offer your .60-size helicopter more authority in challenging maneuvers. You don't desire to accept frustrating mounting alterations and gearing alterations.
O.S. contains the reaction: the 70SZ-H. It installs in identical area as a .61, and functions in virtually the same rpm musical organization...so you can upgrade right away, and straight away enjoy additional lean muscle mass for 3D traveling and FAI F3C competition.

Especially developed to meet the performance requires of FAI F3C competition pilots.

Throttle setup guide markings allow it to be a simple task to see and restore finely tuned settings after maintenance.

Additional mounting lug on front part of crankcase increases protection during extreme maneuvers.

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

Three-needle carburetor allows acutely precise alterations.

Big helicopter cylinder head provides good ac fin area?Xincreased webbing regarding crankcase front part improves temperature dissipation much more.

DEMANDS

• Stock amount: 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 fat w/o Muffler: 19.5 oz (553.5 g)
• needs: Muffler & gas