Free boat plans from "science and mechanics", "boat builder handbook" and other very old magazines. trouble viewing? try the low band width index.. boat plans from science and mechanics and boat builder handbooks.. Easy-to-follow wooden boat plans available for instant download. boat building can seem like an overwhelming task. how can someone take a boat design, follow the boat plans and turn it into a gorgeous sailing vessel he can be proud of?. Free pontoon boat plans. well look what we have cooking here: free plans to make your own pontoon boat! length: 12′ (3.7 m) beam: 72" (1.8 m) height: 20" (51 cm) est weight using meranti: 180 lbs. (83 k), okuome: 150 lbs lbs (68 k).