Aquarail - By Hal Kelly. Aquarail is a scat type little boat. In drag racing they have a type of car that is fastest of all. It’s referred to as a rail job. So, since our bug is a boat that goes quickly, we call it an Aquarail. The most attractive feature of Aquarail, though, is that she's a fast, highly maneuverable yet safe boat. With a high pitch, two-blade prop on our 20-hp Chrysler outboard she does more than 35 mph carrying one person and more than 30 carrying two. With a lower pitch prop she would pull a water skier at close to 30 mph.