RE: 6 oz "Flywheels"
The Twist is made by Hangar 9 and available through Horizon Hobby.
Actually, there are 3 of them. I have the Twist 40 with a Fox .78 engine on it. (A rocket!) I also have the Twist 60 with a Super Tiger .90 on Gas/Glow on it. Then they also make the Twist 150 which is designed for Glow or a 26cc gas engine.
The Twist shown in this thread is the .40 version. They are fun planes, but have a weakness in the fuselage. There have been problems with them breaking the fuselage at the rear edge of the canopy where the fuselage is the thinnest. I never broke my Twist 40, (knock on wood!) but I broke my Twist 60 fuselage twice. I finally laminated 1/8" ply with epoxy onto both sides of the fuselage in that area, and no more problems.
Here's a pic of my Twist 60/Super Tiger Gas/Glow .90 combo. (Taken after fuselage repair)
AV8TOR