Does attaching a fan on a jon boat turn it into an airboat?
Not by this definition. There are watercraft being sold as “airboats” that are not ATVs. Airboats do not use a submerged water screw and do not churn up the water. Except for the noise, airboats are very eco-friendly. The airboat differs from the hover craft with respect to the amount of air cushion. An airboat may route some air from a supercharger to a cavity beneath the hull to reduce surface friction. The air cushion, however, is infinitesimal compared to a hover craft which often routes half of its power to the task of generating an air cushion. Most airboats are about 16 feet in length but they have been built as short as 6 ft. and as long as 30 ft. There are drilling platforms, which are essentially air-screw powered barges, that are much bigger than 8×30. The 8 ft. width is about the maximum width for easy tailoring and trucking. The term “airboat” is not found in most abridged dictionaries.