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A comment on Boom Supersonic raises $100M, aims for 2019 test flights. Parent comment

Re:Boom Supersonic raises $100M, aims for 2019 test flights by FlyMoreRockets on Saturday January 05, 2019 @08:52PM (#18835842)
I saw the dash, but didn't understand it. If the payload with hydrogen is 21,000lbs and it is -34,000 pounds with helium, then it seems like it wouldn't even get off the ground. But clearly, it did get off the ground with passengers using helium, it was designed to fly with helium.
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Re:Boom Supersonic raises $100M, aims for 2019 test flights by TylerE on Saturday January 05, 2019 @10:15PM (#18836330)
No it wasn't. The German Zeppelin's always run hydrogen. At the time the US had the only real supply of helium and they wouldn't sell to Germany.
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Re:Boom Supersonic raises $100M, aims for 2019 test flights by FlyMoreRockets on Saturday January 05, 2019 @10:18PM (#18836343)
Okay, I stand corrected about it flying on helium, thank you for correcting me, +1. However, the Hindenburg was designed to fly using helium as the lift gas.

https://en.wikipedia.org/wiki/Hindenburg-class_airship#Lift_...

The article goes on to say the difference in lift between hydrogen and helium is only 8%.

Edit: drop the apostrophe on zeppelins

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Re:Boom Supersonic raises $100M, aims for 2019 test flights by TylerE on Saturday January 05, 2019 @10:45PM (#18836433)
8% of 500,000lbs is....
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