Compact Wankel Performance for Small RC Models
The O.S. Engine 49-PI Type II .30 Wankel Rotary Engine packs dependable, smooth power into a small package. Built for small-scale aircraft, it gives pilots responsive thrust with reduced vibration thanks to its rotary architecture and precision bearings, making it suitable for both learning pilots and experienced flyers seeking refined throttle response.
Why the Wankel Design Runs Smooth
The rotary layout reduces the number of reciprocating parts compared to piston motors, which lowers vibration and produces quieter operation. The use of two needle bearings plus a ball bearing improves rotor support and durability, helping the engine stay stable over longer flights.
Powerband and Practical Performance
With a displacement of 0.30 cu in (4.97 cc) and a peak output of 1.27 hp at 17,000 rpm, the 49-PI Type II has a useful practical rpm range from 2,500 to 18,000. That range makes it versatile for slow cruise, precise aerobatics, or spirited sport flying depending on your prop choice.
Flexible Mounting and Muffler Options
Installation is adaptable to many airframes since the muffler can be rotated to suit different mounting clearances. The Venturi intake design helps feed the carburetor more efficiently, improving throttle response and fuel-air mixture consistency.
Specifications
- Displacement: 0.30 cu in (4.97 cc)
- Practical rpm: 2,500-18,000
- Output: 1.27 hp @ 17,000 rpm
- Weight: 11.8 oz (335 g)
- Includes: Glow plug, muffler
- Recommended props: 9x6, 9x7, 10x4, 10x5, 10x6, 11x4, 11x5
The O.S. Engine 49-PI Type II .30 Wankel Rotary Engine is a compact, reliable choice when you want smooth power without excess weight. Its configurable mounting and broad rpm band make it a practical upgrade for many small RC aircraft.
