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16th Apr 2014, 12:15

#3 (permalink)

joy ride

Join Date: Jul 2013

Location: UK

Age: 68

Posts: 736

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Agree with Load Toad, plenty on-line, and there is a book called Dr Eckener's Dream Machine which might help.

Apparently Helium is becoming much rarer, which might soon have consequences for Airships.

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