Build a 8-ft. homebuilt submarine DIY project

diy homebuilt 8-ft. submarine, free boatbuilding plans

If you’re a skin diver of any experience you know that an electric powered sport submarine is great for underwater exploration.
Seated in such a vehicle, you can cover more bottom simply because you do not expend your energy in swimming and your precious air can be made to last much longer. Also, it’s great fun to operate.

In building the sub, our original intention was to make it of fiberglass
with a Plyfoam core. A wet sub (one that fills with water and is used
with an aqualung) requires a certain amount of flotation and we felt
the Plyfoam would be ideal. Sold by Plyfoam, Inc., E. Beth page Rd.,
Plainview, L.I., N.Y., it is unique in that it is thermoplastic; that is, when heated to about 180*F, it can be shaped to any mold. Then when it cools it retains the form of the mold and its strength as well. With a layer of fiberglass bonded to each side, it becomes strong indeed.
We planned a wooden mold on which we would lay up a quarter-in,
shell of Plyfoam. Then we would cover the Plyfoam with fiberglass,
remove it from the mold and apply another layer of fiberglass on the
inside. Doing it twice would give us the two halves of our hull.

CLICK HERE to download and print these plans(pdf format)

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