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voor de liefhebbers van bouwen en duikboten ;)

How to build your own submarine
By William Steiniger and Jack Smith

IF you're a skin diver of any experience you know that an electricpowered 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, Frances Gaar, the underwater swimming star who posed for our cover, will attest to the fact that 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...

Thanks to Submariner :)