Download rc boat plans for your next project here. these rc boat plans are meant for scratch building radio controlled boats mainly from balsa and with a minimum of. About tbdp | features | new in tbdp | how it works | design inputs | screens | vbdp | testimonials | mag reviews | updates | order : the tunnel boat design program. The tunnel hull is a strange ‘bird’. while the tunnel derives much of its high performance from air lift, it depends at the same time on its planing interaction with.