Definition: Radio controlled airboats or hovercraft have a flat-bottom design. As the name suggests, the bottom of the boat is flat or very nearly so. They float on a cushion of air just above the surface and have motors that sit up above the body at the rear of the boat. They use an airplane propeller to provide forward thrust. Dinghies and rowboats also have flat-bottom hulls, but you're not as likely to find them in radio controlled models.
AquaCraft Alligator Tours Airboat (Buy Direct) is an example a of nitro-powered airboat. These Cajun Gator RC AirBoats are both ready-to-run and built from kits and include a semi-tunnel hull design as well as flat-bottom models.
Also Known As: flat-bottomed