The plans cover building the airboat hull, propeller cage and all the controls. why just paddle around your lake, stream, or river when you can be out there zipping around on your very own airboat! look, if you want to be out there on the water without spending gobs of cash then this is the answer for you.. Airboat. airboat is a mixture of airplane and boat with the thrills of both. it’s a boat powered by an airplane-type propeller with above-the-water rudders that is capable of skimming over a few inches of water and vegetation.. Find great deals on ebay for airboat propeller. shop with confidence..