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There are probably many practical concerns, but another is that hydrogen airships are rather dangerous, and that there is a pending shortage of helium, the main
by wikwocket 13y ago
There are probably many practical concerns, but another is that hydrogen airships are rather dangerous, and that there is a pending shortage of helium, the main alternative. The U.S. has a National Helium Reserve that holds 30% of the world's helium, and it is expected to run out before 2020 according to Wikipedia.
- haspoken 13y agoHydrogen, helium, methane, ammonia and hot air are all capable of being used for aerostatic lift. source: http://airshiphangar.com/science.html http://airshiphangar.com/science.html