Free rc model mono hull boat plans; if this is your first visit, be sure to check out the faq by clicking the link above. you may have to register before you can post: click the register link above to proceed. to. This is a selection on some of the free motorboat plans that were published in "popular mechanics", "popular science" and the "boat builder handbook" yours to download for free (pdf).. Gill 12 tugboat: download free plans : please but he has designed a cute little boat and has generously agreed to offer the plans for free here. hull panels and transom cutout and ready to be stitched together..