Ripmax Tomkat,
an original design built for a 12in passenger, but can run without and will go that bit faster, upgraded to brushless and 2.4 G radio and lipo battery.
Originally had a 550 type motor brushed esc, 27mhz radio, and ni-cad battery, main fault of boat is that it has a very poor reverse, as it has been designed with a surface piercing prop, so only effective in forward motion.