Scroll down this page for many more plans. this a page of links to some favourite free boat plans at intheboatshed.net. they’ve been chosen because they are derived. Boat plans for power, sail and small boats. free boat plans. boat kits and supplies plus the best boat building technical support.. Free ramp plans for a 4 foot mini halfpipe, 8 foot vert halfpipe, 4 foot quarterpipe, grind box and funbox, instructions include step by step pictures and videos..