Helicopter Engines

.70 SZ-H Ring 3D

Part No.	PHOTO	Description	CART	Price
OS MG1972		Engine .70, SZ-H Heli, O.S. Engines In Stock!	ADD	$299.95

Increase power – with drop-in ease!

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 supported 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.
• The .70 SZ-H Ringed engine's carburetor includes a mid-range needle that enables pilots to achieve extremely precise adjustments.
• A push/pull throttle arm offers added finesse and precision in power control.
• Additional lugs are provided on the crankcase for increasing stability in models with mounts able to take advantage of them.

Part No. OS MG1972 Displacement: 0.702 cu in (11.5cc) Bore: 1.016 in (25.8mm) Stroke: 0.866 in (22.0mm) RPM: 2,000-18,000 Output: 2.5 hp @ 16,000 rpm Weight: 19.5 oz (553.5g) Requires: muffler & fuel

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