🔥 O.S. SPEED B21 ADAM DRAKE 4 Nitro Engine 🔥
🔥 O.S. SPEED B21 ADAM DRAKE 4 🔥 #drake #ad4 #drakein O.S. Engines would like to introduce new O.S.SPEED B21 ADAM DRAKE 4. Latest collaboration engine with world famous O.S. Team driver Adam Drake. Cylinder liner, crankshaft, inner head button, and outer head has been redesigned to Adam Drake’s spec for better balance, more torque and more power for better driving performance. Spec--------------------------- Displacement： 3.49 cc / 0.213cu.in. Bore: 16.4mm / 0.646 in. Stroke: 16.55mm / 0.652 in. Output :2.65 ps / 2.61 hp / 34,000 r.p.m. Practical RPM range: 4,000-42,000 r.p.m. Engine Weight:352g / 12.42 oz. Standard accessories--------------------------- O.S. SPEED P3 glow plug Reducer 6II (blue) AL2・Reducer 8mm (blue) AL Exhaust seal ring Dust cap set 3mm/16mm/18mm www.thedrakeracing.com
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