This little air boat was released in 1999. Although not quite as small as the 4 tiny micro models, this mini model was still obviously targeted at a young audience. It has only a single belt driven function but also has some curved detail added by using semi-rigid hoses and ribbed hoses.
Propeller
The rear propeller is driven by a belt via a set of hidden wheels. Because of the difference in the pulley diameters, the prop is geared about 3:1.
By Technicopedia