Rc boat company builds rc (radio control) race boat hull kits for 1/8 scale unlimited hydroplanes, classic thunderboats and gas scale hydros. we also build cowlings. A scratch built rc boat hull easy and inexpensive. learn to scratch build with this simple project. plans are available for download.. About tbdp | features | new in tbdp | how it works | design inputs | screens | vbdp | testimonials | mag reviews | updates | order : the tunnel boat design program.