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Comment: Re:This should be amusing (Score 1) 21

by Rei (#49499623) Attached to: Google Ready To Unleash Thousands of Balloons In Project Loon

They talk about how they need to regularly pick up and relaunch balloons when they come down. I don't see why they would need to design the balloons without any sort of reinflation system. The leak rate is tiny, right? So:

1. A little more solar panel area than they already need.
2. Hydrogen filled instead of helium filled.
3. Tiny container of sulfuric acid (hygroscopic - self-dilutes down to a given concentration with atmospheric moisture)
4. Electrolysis cell (sulfuric acid is used as the electrolyte in some types of electrolysis cells).

Problem solved. Sulfuric acid draws moisture from the air, and during the day the solar power electrolyzes it it to produce a minute trickle of hydrogen into the balloon, which replaces the minute trickle that leaks out. Your balloon's lifespan is now as long as your electronics and envelope last.

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