October 17, 2017

Kabuto R21 Model ’18 nitro on-road engine

Coming from SMJ is the Kabuto R21 Model ’18 3.5cc nitro on-road engine. The power plant is based off of the O.S. Speed R2103 and it received a new liner, crankshaft and steel main bearing for improved low to mid range torque. The DLC-coated and tuned crankshaft features Tungsten weight balancing and the overall design ensures low fuel consumption even in the high-grip conditions the engine was developed for. The engine is available pre-broken-in to have faster access to its full potential.

– Displacement: 3.49cc
– Bore: 16.08mm
– Stroke: 17.20mm
– Power: 2.8HP/2.76HP at 33,000 RPM
– Practical range: 4,000-45,000 RPM
– Weight: 340g

Source: SMJ [smj-rc.com]


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