1.best qulity 2.Good for helicopter SPECIFICATIONSDisplacement: 14.95cc(0.912cu.in)Power Output: 3.4ps/3.35hp/15,000r.p.m .Bore: 27.7mm(1.091in.)Practical RPM Rang: 2,000-16,000r.p.mStroke: 24.8mm(0.976in.)Weight: 625g(22.05oz.) OS MAX-91HZ-R OS18640 RC helicopter engine
