3 ms·

At $35/litre this could get expensive pretty fast!

• Animats 11y ago
  It does. That's what killed Silicon Valley's airship, the Zeppelin 2 operated by Airship Ventures. The price of helium doubled, and airship sightseeing was no longer cost effective. That was a nice airship, too; much more maneuverable than the old ones. It's hard to contain helium, especially when you have to do it with a ballonet that's severely weight-limited. Helium tends to slip between the molecules of thin materials.