Item Description

Ideal for F3C & 3D, The 91HZ Ringed delivers the high-end power and hovering stability required to execute competition-level heli maneuvers. Now features a 61-E carburetor for improved performance!

* Ideal for F3C aerobatic competition.
* Rectangular heat sink allows engine to be enclosed entirely inside a cooling shroud.
* 61-E carburetor features a thermal insulator to absorb heat. A needle valve control lever allows you to control the mixture from your transmitter.
* Piston and ball bearing-supported crankshaft are designed for reduced vibration improved torque stability across the entire RPM range.
* Heat sink-type backplate.

Specification

Displacement: 0.91 cu in (14.95 cc)
Bore: 1.09 in (27.7 mm)
Stroke: 0.98 in (24.8 mm)
Weight (w/o muffler): 1.36 lb (618 g)
Practical RPM Range: 2,000-16,000
Output: 3.4 hp @ 15,000 rpm