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Permalink Reply by gadgetfan2 on May 23, 2012 at 8:04pm

Hi,

Here is a source for pre-made Polyurethane envelopes and motors. I use the 1/3 oz motors on my 6 ft blimp.

Look here

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Permalink Reply by dmorton on November 6, 2012 at 8:34pm

http://www.airtimekite.com/ sells bladders for kites.

Their Orange bladder material is an EVOH/LDPE laminate - very tough and light weight, and much easier to heat seal than PU. For making a long thin blimp - a hyperblimp - you could do worse than buying the biggest leading edge bladder they have (about 24 inches circumference) and working from there.

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