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One nice feature of hydrogen is that you can use it for lift and also for fuel (and it has good energy density). I've been wondering for a while if hydrogen ai
by CuriouslyC 5y ago
One nice feature of hydrogen is that you can use it for lift and also for fuel (and it has good energy density).
I've been wondering for a while if hydrogen airships couldn't make flying cars a reality. It seems like a hybrid jet/zeppelin could find a sweet spot in terms of performance and sustainability.
- jandrese 5y agoThe necessary bulk of the airship for human transportation is a serious crimp in the practicality of such a solution. Technology can't make the bag small enough because it is limited by physics. Even if we could build ultra-rigid and outrageously light bags that could have all of the air pumped out for a vacuum you still need a fairly large balloon to carry people. One person would displace 70 meter^3 of air, not counting anything else. That's not going to fit in your driveway.