O.S. Engines

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OS .46 LA

The standard in sport engine technology, in a unique streamlined design.
More cooling fin area extends the life of the engine, and virtually eliminates engine seizures in the air.
Added "webbing" on the crankcase strengthens high-stress areas to help ensure that they stand up to the rigors of learning to fly.
Overall tighter needle valve fit utilizes an "O" ring to help maintain the performance levels you need.
A fuel inlet that points up allows for easier fuel line access for fueling and defueling.
1.2HP
9.6oz

OS .46AX II

Ease, dependability and performance are what make engines popular - and they're also three good reasons why the 46AXII has become an instant flyer favorite. Lightweight and low maintenance, the 46AXII is as good a choice for easy sport flying as hard-charging aerobatics. An extension cable and an angled high-speed needle make fine-tuned performance and maximum personal safety easy to enjoy.

* Simple, side-exhaust design.
*Power Box muffler features a squared-off shape for easier fits in more cowls.
*40K carburetor has high- and low-speed needles, plus a mixture adjustment screw. Tighter tolerances between the piston and ABL create a tighter compression seal and improved power.
*Dual ball bearing-supported crankshaft lowers friction and wear.
*Head automatically centers and levels itself - and snugs down with just 4 screws.
*Subtly tapered low-end needle eliminates surging at transition, ensuring smooth, controllable power across the rpm range.
*Updated liner ports and a ball-milled inlet port minimize turbulence and promote better fuel/air mixing.
*Minimizes "creep" and resets with seals on both needles and a ratchet spring on the high-speed needle. A rotor guide screw eliminates spring-related movement, too.
*Includes a lock nut and a longer crankshaft with more thread length to ensure better prop nut engagement and greater pilot safety.
*Includes glow plug, muffler, cable extension and warranty.
*The ABL (Advanced Bi-Metallic Liner) includes one layer for better bonding, and another to reduce wear and extend life.
*A needle-valve extension cable and rear-angled high-speed needle maximum pilot safety and convenience.
*A generously sized chamber and larger sound baffle help the Power Box muffler significantly reduce exhaust noise without compromising power. Rotatable exhaust outlet provides effective, no-cost finish protection.
1.63HP
17.1oz(with muffler)

Os 75AX Engine

The New power source for .60 sized aircraft
* Fits the same mount and bolt pattern as the 61FX.
* The angular head design looks great and significantly increases surface area for better cooling.
* Includes the new Power BoxT muffler, designed with more volume for increased power while still being very compact.
* A diagonally-placed needle means no remote needle valve is needed.
1.94HP
19.4oz

os 95AX engine

The 95AX is another popular-sized engine in the AX series that's famous for providing uncompromising power in tight-fitting applications. The power of a 95 in the same size bolt pattern as the 75AX.

A high-performance engine that's ideal for aerobats and large-scale models.
Generous thread on the extra-long, balanced crankshaft means more secure prop attachment
Balanced cracnkshaft provides smoother running which is important on the larger single-cylinder engines as vibrations can literally shake apart the airframe.
The E-4040 Power BoxT muffler that's included dampens noise while boosting power.
2.86HP
20.0 oz