Pt boat plans for the famous pt 109 offered in 1:32, 1:24 and 1:16 scale – buy and download a relatively easy-to-build semi scale blueprint of an elco 80-footer.. Original boat redrawn. due to the large number of photo’s and books that i have acquired over the years i have decided to redraw the boat as close to the original as. About. this is a resource site by jeff davidson for the building details of an elco 80′ world war ii motor torpedo boat (mtb) / patrol torpedo (pt) boat with leanings.