Power Train!

The engine is a stock Irvine 25 BB ABC. It is equipped with a J'en venturi. The engine and venturi are available from Just Engines. The muffler is a Big Art Adamisin tongue muffler.
The engine is really sweet. It starts easily. And it runs strong and steady. And it has plenty of power for a plane this size.
It is mounted on an offset engine mounting pad.
The tank is a GRW 4.25 oz. Chicken Hopper. And don't forget the 1/2" R/C foam under the tank.
The tank mounting hardware is just bicycle spokes and rubber bands.
And "ain't it pretty"!