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| Re: Signal priority in NYC (342585) | |||
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Re: Signal priority in NYC |
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Posted by AlM on Sun Jun 6 15:46:10 2021, in response to Re: Signal priority in NYC, posted by Spider-Pig on Thu Jun 3 22:54:05 2021. * What about hydrogen instead of diesel fuel?Diesel fuel has an energy density of 38.6 MJ/L whereas liquid H2 has an energy density of 8.5 MJ/L. OK, that sounds impossibly low. However, it has a specific energy of 45.6 MJ/kg, while liquid H2 has a specific energy of 120 MJ/kg. So H2 fuel needs almost 5 times the volume but only a bit more than a third of the weight. It strikes me that you could build a fuselage that can carry all that volume efficiently. |
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