Evolution 91NX Glow Engine

The Evolution® .91NX single-cylinder, 2-stroke glow engine is revolutionary for modelers who demand the most of their engines. This engine provides the performance of a .91-size engine in the case size of a .61-class engine, allowing you to put more power into smaller aircraft. The awesome power of the .91NX engines makes it possible to add a higher level of performance versatility to your .61-, .75- or .91-size airplanes, so that your 3D maneuvers have more punch and warbird strafing runs can reach speeds faster than you imagined possible.

Evolution glow engines are engineered for hands-on modelers who believe there's no replacement for displacement. Their awesome power-to-weight ratios and smooth operation make any flying experience, be it 3D, sport or scale, the best it can be.

Specifications

Type: 2-stroke airplane engine
Displacement: 0.91 cu. in. (15.00 cc)
Bore: 1.09 in (27.8mm)
Stroke: 0.98 in (24.9mm)
Cylinders: Single
Total Weight: 20.0 oz (570 g)
Engine (Only) Weight: 15.3 oz (435 g)
Muffler Weight: 4.7 oz (135 g)
Crankshaft Threads: 5/16 x 24
Benchmark Prop: 14 x 7 @ 10,700 rpm
Prop Range: 13 x 7–15 x 6
RPM Range: 2,000–15,000 rpm
Fuel: 10–30% nitro fuel, 16–18% oil
Muffler Type: Expansion chamber