I like how you just assume that we haven’t advanced technology or safety features at all since the 1930s.
Comment on World’s first crewed liquid hydrogen plane takes off
j4yt33@feddit.de 1 year ago
Comment on World’s first crewed liquid hydrogen plane takes off
j4yt33@feddit.de 1 year ago
I like how you just assume that we haven’t advanced technology or safety features at all since the 1930s.
It was a joke
A_A@lemmy.world 1 year ago
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The space shuttle contain a huge reservoir of liquid hydrogen at very low temperature creating extremely difficult engineering stresses.
So, insurance cost will be sky high if ever such planes take commercial flights.
photonic_sorcerer@lemmy.dbzer0.com 1 year ago
Well you know what else is explosive? Jet fuel!
A_A@lemmy.world 1 year ago
Do you know how brittle metals become at very low temperature ? Did you notice I did not talk about hydrogen explosiveness ?
But sure, let’s now talk about explosiveness. Do you know the mixture ratio range is completely different (much greater) for air + H^2^ explosive mixture as compared to other mixtures ? You are very far from an expert on the topic aren’t you ?
Cleverdawny@lemm.ee 1 year ago
Hydrogen isn’t explosive, it’s flammable. Just like jet fuel.
PrincessLeiasCat@sh.itjust.works 1 year ago
It also had 5 pressure vessels’ worth of liquid H2 for the fuel cells in the payload bay (and never had any issues wrt that, though of course it did present its own challenges). Challenger’s “failure mode” was in the SRB. The ET happened to be right next to it. We can talk about the ET and its direct impact on Columbia because the foam shedding was a problem with the ET. And of course, the issues with the NASA culture that were present for both.
I’m not going to wade into the semantics of explosive vs flammable argument further down because at the end of the day it’s semantics.
And I am an expert since you seem very intent on only experts partaking in this discussion.
A_A@lemmy.world 1 year ago
I agree the SRB was the start of the huge explosion that somehow involved liquid hydrogen. I was posting that example because I was replying to an example where it was gaseous hydrogen combustion and because for the plane in the post it is liquid hydrogen which is used.
I don’t mind talking to non-expert as long as they don’t believe they know what they don’t know and do not insist they know better when they don’t.
From your comment I don’t know what “ET” means but I suppose “SRB” is something like side booster rocket (?) I am not an expert of the space shuttle so please tell me if it pleases you to do so.
PrincessLeiasCat@sh.itjust.works 1 year ago
ET is the External Tank, the orange part of the Shuttle that held liquid H2 and O2.
The gaseous H2 was still a concern for the H2 tanks in the Payload Bay. If there was a leak that accumulated H2 in the bay after the Payload Bay doors were closed for re-entry, that would be a flammability concern.
They both present their own sets of problems and failure modes that need to be discussed and mitigated, but we do have experience in other areas to look back on and learn from.