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Talk:HacDC Spaceblimp

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Why use helium instead of hydrogen?
Wouldn't you get more lift? Leakage maybe?
Are there flight requirements other than avoiding restricted airspace?
Do you have to notify anyone or announce the release on the radio?

Photograph

I uploaded the group photograph at https://commons.wikimedia.org/wiki/File:2016_SpaceBlimp_VI_on_27_September_2016.jpg#.7B.7Bint:license-header.7D.7D on Wikimedia Commons. Geraldshields11