It does. That&#x27;s what killed Silicon Valley&#x27;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.<p>It&#x27;s hard to contain helium, especially when you have to do it with a ballonet that&#x27;s severely weight-limited. Helium tends to slip between the molecules of thin materials.