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Old 10-06-2020, 01:26 PM   #46 (permalink)
freebeard
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Inflatables are of two type. Single-walled with interior pressure, and double walled with the interior at ambient pressure. I presume you are going for double-walled.

The shape can be easy.


Antfarm used an electric iron with the material drapped over a thin edge:


https://www.foundsf.org/images/9/98/...inflatable.jpg

The hard part is attachment and ingress/egress. (I'm not retired, I just between gigs)
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