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Old June 30th 20, 12:34 AM posted to rec.aviation.piloting
Larry Dighera
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Posts: 3,953
Default ZeroAvia's Val Miftakhov makes a compelling case for hydrogen aviation

On Tue, 23 Jun 2020 23:36:54 -0000, wrote:


Most airports don't even offer MOGAS and you think they are going
to install huge solar arrays and cryo-coolers to produce liquid
hydrogen?


Perhaps.


Yeah, sure, when hell freezes over and hippopotamus fly.


If my preliminary calculations are near correct, I would expect LH2
generating facilities to reside on-premises to avoid the loss of
efficiency in transporting it for delivery.

Your conclusion that 'huge solar arrays' would be necessary may be
incorrect. Have a look here
https://www.youtube.com/watch?v=7PWESWqhD8s to get an idea of what may
be involved in generating LH2, but assume pure H2 generated by
electrolysis. Calculate the approximate power required per liter of
LH2 produced, if it is similar to LN2 produced in the video.

Given the ~3X energy density of LH2 compared to JetA, and the ~90%
efficiency of electric motors, compared to ~20-30% efficiency of IC
engines, I would expect significantly less fuel to be required to
achieve today's performance and range.