The AW Choppy is a single seat, open cockpit, frame fabrication helicopter. Some people have even used a snowmobile motor! More recent choppers commonly use an ultralight 2 cycle Rotax engine around 52 horsepower. The Choppy (also known as the Hobbycopter) was designed to use a motorcycle engine of about 50 hp for the powerplant. Designed in the late 50's, The AW Choppy was designed to use commonly found materials that were readily available to consumers. Detailed item info AW Choppy Hobbycopter Homebuilt Ultralight Helicopter Plans Adams-Wilson “choppy” Hobbycopter PlansAW Hobby CopterThe AW Choppy is one of the most famous of all homebuilt helis. Item: 131256484701 AW Choppy Hobbycopter Homebuilt Ultralight Helicopter Plans DIY construction CD.
