RE: Funtana s 40 With OS 50 SX
The OS .50 SX comes to life with a Tower .46 muffler on it, using either an APC 12X4 or 12.25X3.75W prop on it will work great. Sorry I let mine go in a trade. It's a great engine. A friend got a Magnum .52 to run really well on his Funtana and wore both the plane and engine out, with 3D flying.
We have some guys intalling the OS Helo, Hype .50 on theirs with the Tower Muffler and running 20% helo fuel, the performance and wing loading are terrific for 3D.