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OS Engines MAX 25FX-II Nitro Aircraft Engine, .25 Size w/ 892 Silencer
Displacement 4.07 cc / 0.248 cu.in.
Bore 18.0 mm / 0.709 in
Stroke 16.0 mm / 0.630 in.
Weight 248 g / 8, 75 oz
Silencer Weight 62.5 g / 2.2 oz.
Output 0.84 ps / 18,000 r.p.m. / 0.828 hp / 18,000 r.p.m
Practical r.p.m. Range 2,000-19,000 r.p.m.