Purchase online, then download start building today! the dillon laker 14: boat plans: a recreational tunnel boat for motors 60 hp to 80 hp. The hull is about more than just good looks. the shape of the hull affects the speed, stability, and maneuverability of the rc boat. flat-bottom, monoplane. This is the 24" hot shot sprint tunnel hull boat by dumas. the hot shot sprint is designed for a 3.5cc outboard marine engine..