O.S. MAX 15CV-RX Engine (L-OS11640) The ultimate combination of performance & convenience in a side exhaust 15-size engine. If the class you want to race in allows 15s & you want the best, then take a long look at the Max 15CV-RX. Its not cheap, but the best never is! Supplied with standard shaft, drive washer & rotary 10E-R carburettor. Specification: Weight: 253g Displacement: 2.49cc 0.152cu. In. Bore: 15.2mm 0.598in Stroke: 13.7mm 0.539in Power Output: 1.2/31000 (BHP/RPM) Practical RPM: 4000-36000 ...

O.S. MAX 18CV-RX Motor (L-OS11840) A powerful side-exhaust motor of 3.0 cc capacity for 1:10 scale model cars. Twin ball raced crankshaft, ringless piston/liner, tall heat-sink head for optimum heat dissipation, newly developed Type 11G slide carburettor & type 203 super air filter. The OS MAX 18 CV-RX version also features a pull start. Specification: Weight: 237g 8.38oz Displacement: 3.0cc 0.18cu in. Bore: 16.0mm 0.63in. Stroke: 15.0mm 0.591in Power Output: 1.35PS@28000 RPMPractical RPM: 3000-32000 ...

O.S. MAX 21VG-P ES (L-OS13642) Identical

Specification to the 30VG (P) SR but supplied with the complete rear shaft-start

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O.S. MAX 21VZ-B V-Spec. Engine (21C) (L-OS13890) The OS tradition of offering the best 1/8th scale off road engines is broughtnew meaning in the new 21VZ-B V-Spec. As you would expect, there areperformance gains from this new engine to keep you at the front of the pack. But thats not all, OS have given equal attention to reliability, ease of handlingand style. No one will be in doubt what engine you are using as you passthem! Specification: Weight: 360g 12.70oz Displacement: 3.46cc 0.21cu in. Bore: 16.6mm 0.654in. Stroke: 16.0mm 0.63in Power Output: 2.48PS@33000 RPMPractical RPM: 3000-40000 ...

O.S. MAX 30VG (P) Engine (L-OS13960) When the engine in your Monster Truck is just not quite enough, yet you are restricted by the size of the mounts (21 size), the new 30VG could be the answer to your prayers. This engine is designed to pack the largest amount of power into the smallest possible crankcase. Supplied with the P style crankshaft. Specification: Weight: 360g 12.70oz Displacement: 5.0cc 0.298cu in. Bore: 18.5mm 0.728in. Stroke: 18.2mm 0.717in Power Output: 3.0PS@28000 RPMPractical RPM: 4000-36000 ...

O.S. MAX 32SX-H Ring w/o Drive Wash Engine (L-OS12986) The ringed piston/liner assembly gives a lower compression on start-up without sacrificing top end power & performance, & provides easy needle setting characteristics. Developed for small helicopters, the O.S. MAX-32SX-H is a design suited to beginners & experts alike, who appreciate the quality. With many of the design features of the larger, F3C competition standard engines, the high performance 32SX-H has a new design of large bore carburettor
- type 20C
- to provide stable hovering characteristics & more power at the top end. It also

Includes:: a plated crankshaft to prevent corrosion & to increase the engines durability, a new rear ball bearing design with specially heat treated balls, enlarged con-rod & crank pin & a heat treated piston pin. With its ringed piston/liner assembly, twin ball raced crankshaft, enlarged cylinder head for enhanced cooling & mounting holes suited to most helicopters, the 32SX-H makes a worthwhile upgrade for any flyer. Specification: Weight: 285g (ring) 10.05 oz Displacement: 5.23cc 0.32cu in. Bore: 19.5mm 0.768in. Stroke: 17.5mm 0.689in Power Output: 1.2PS@18000 RPMPractical RPM: 2000-22000



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O.S. MAX 37SZ-H Ring w/o Drive Wash (L-OS14000) Following on from the concept developed in the 70SZ-H, the latest 37SZ-H brings a new level of performance to 30-class helicopters. Just about everything has been changed compared to the 32SX-H in the pursuit of power & control. That super-rigid crankcase contains a highly developed, ringed piston/liner set & optimised crankshaft for the right combination of power & smoothness. The new carburettor has been purpose designed for precision control & is capable of being operated by push-pull linkages if required. This is the perfect engine to compliment your new Hirobo Sceadu Evo & move your flying on to a new level. Specification: Weight: 293g 10.33 oz Displacement: 6.07cc 0.37cu in. Bore: 20.5mm 0.807in. Stroke: 18.4mm 0.724in Power Output: 1.4PS@18000 RPMPractical RPM: 2000-21000 ...

O.S. MAX 46AX w/E-3070 Silencer (L-OS15481) The first engine in the AX series, the 46AX features a new rear-mounted needle valve system that tolerates crash damage better. The new carburettor has been refined further to make adjustments more precise & throttling even more progressive. The amazing new P-Box silencer is both distinctive in styling as well as being functional. Inside, the ringless piston/liner system delivers strong power & enhanced life. ...

O.S. MAX 46LA Silv. w/E-3030 Silencer (L-OS13393) Physically identical to the popular 40LA but with a 20% increase in power & no discernible increase in weight. If youve built a model thats ended up a little on the heavy side for a 40LA then the 46LA could be the answer to your prayers! Like all engines in the LA range the 46LA comes with an A3 glowplug as standard plus the highly effective E-3030 Silencer. Specification: Weight: 272g (9.59oz) Propeller Range: 11x 6 11x 7 Displacement: 7.64cc (0.46cu.in.) Bore: 23.0mm (0.910in.) Stroke: 18.4mm (0.724in.) Power Output: 1.25PS@15000RPM Practical RPM: 2000~16000RPM ...

O.S. MAX 50SX-H Ring Hyper (L-OS15550) The best 50-class engine on the market just became amazing with the introduction of the new 50SX-H Hyper. That CNC machined cylinder head has been developed to give better power & enhanced cooling at the same time. The new carburettor has also been enhanced to help extract more power than the standard engine without sacrificing the throttle precision you have come to expect from OS helicopter engines. This truly is the best engine in the 50-class & is fast becoming the best seller as well. Its an OS, what else would you expect!! Specification: Weight: 413g Bore: 22.0mm 0.866in. Stroke: 19.6mm 0.772in Power Output: 1.8/17000 (BHP/RPM) Practical RPM: 2000-20000 ...