The brilliant new O.S. 37SZ-H is the perfect choice when you want the ultimate in performance from your 30 class helicopter. Features a super-rigid crankcase, ringed piston/liner assembly, and a new c...
The brilliant new O.S. 37SZ-H is the perfect choice when you want the ultimate in performance from your 30 class helicopter. Features a super-rigid crankcase, ringed piston/liner assembly, and a new carburettor for precision control, suitable for use with push-pull set ups. An outstanding performer.