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

Great news the heli modelers: many utilized and effective .91 ringed motor now is necessary a rear-exhaust design!

Pilots of Hirobo and also other scale products will appreciate what type of 91RZ-H energy plant will easily fit into the canopy to safeguard the heli's scale lines.

Just like the side-exhaust 91SZ-H, the 91RZ-H features completely new intake porting, fresh carbohydrate and a redesigned crankcase providing you with better help for the crank and thrust bearings.

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

SPECS

• 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
• manufacturing: 3.3 hp @ 15,000 rpm
• fat w/o muffler: 21.3 oz (605 g)
• Includes: #8 radiance plug