Can one suggest me light weight envelope materials to hold helium gas with 70 to 100 grams per square metre
Question by sudalai shaanak 2 years ago | last reply 2 years ago
A balloon's bouyancy (lifting force) is a function of how much air it displaces. Today's balloons use hot air, hydrogen, helium and other lighter than air gases for lift. In 1670 Franceso de Lana, an italian monk, proposed the use of a vacuum. One major problem is how to make the structure light enough to support a vacuum without collapsing in on itself due to the outside pressure.
Question by sansoy 10 years ago | last reply 4 months ago