Originally Posted by
TransWorld
Also, keep in mind, with the size of H2 it finds leaks where every other test fluid passes. Water, air, even helium can test good. Then H2 leaks.
Just look at launches scrubbed, at Cape Canaveral, with fuel leaks. They are common.
That part is manageable since airplanes don't need to remain fully fueled for extended periods like days, weeks or months. The ground storage infrastructure would leak a little bit but that would be a cost of doing business.
The big leaks which scrubbed those launches were not caused by H2 molecules, they were caused by mechanical sealing problems which were likely due to cryogenic temps... that would be a technical problem for airplane fuel but I'm sure it can be solved. I think NASA's current problems are caused by NASA, not by H2. Shuttle used H2 for several decades.