O.S. Engine 91RZ-H Rear Exhaust Ringed Heli Engine  [OSMG1978]

Nice thing about it the heli modelers: many utilized and effective .91 ringed motor now's necessary a rear-exhaust design!

Pilots of Hirobo and other scale items will appreciate what kind of 91RZ-H power plant will effortlessly fit into the canopy to safeguard the heli's scale lines.

Similar to the side-exhaust 91SZ-H, the 91RZ-H features brand-new intake porting, fresh carbohydrate and a redesigned crankcase providing you with better assistance the crank and thrust bearings.

Available with two heat sink heads: a impressive, blue anodized mind for lots more efficient air-con or a more lightweight, squared die-cast head (DH).

SPECIFICATIONS

• Stock Numbers: OSMG1978 91RZ-H
• Displacement: 0.91 cu in (15 cc)
• Bore: 1.09 in (27.7 mm)
• Stroke: 0.98 in (24.8 mm)
• Practical rpm: 2,000-16,000
• production: 3.3 hp @ 15,000 rpm
• fat w/o muffler: 21.3 oz (605 g)
• Includes: #8 radiance plug