O.S. Speed R21 Shimo Edition 3

Japanese engine manufacturer O.S. Engines has introduced their all new O.S. Speed R21 Shimo Edition 3 1:8 Onroad engine.  The latest collaboration engine with O.S. Team driver Takaaki Shimo, the engine features spacer(s) on exhaust section of the crank case that help to provide more linear from low to top end.  The cylinder liner is now 9 port with new treatment of the piston for longer life of the engine.  The carburettor, to avoid fuel leakage and air in the line, uses “Dust cover ring” to make the idle better and stable.  On the exterior, the engine uses deep gold outer head, venturi to create all new look.  To maximise the performance, a combo set of the engines comes with TR03 EFRA2196 + MR05.

Spec
Displacement： 3.49 cc / 0.213cu.in.
Bore: 16.08mm / 0.633 in.
Stroke: 17.20mm / 0.677 in.
Output :2.80 ps / 2.76 hp / 35,000 r.p.m.
practical rpm range: 4,000-45,000 r.p.m.
Engine Weight:347g / 12.24 oz.

Included Accessories
Glow plug T-RP7
Reducer φ8.5
Exhaust seal ring
Dust cap set 12-30(φ3、φ16、φ18)

Source: O.S. Speed [osspeed.com]