Free rowing boat plans for the backyard home builder, build your own rowing boat, dory, folding dinghy or pram using these simple plywood designs.. Learn how to build yourself a boat in your backyard. our complete boat plans collection is available for free and immediate download. it is the largest wood boat. How fast does it go? for estimating the speed for small outboard planing boats see planing speed boat chart. this chart should be used for general estimates.