I'm entirely on board with this, figuratively but also literally, if given the opportunity. It would be a blast to ride one of these things long distance. As far as cargo goes, I'd like to see a comparison on volume- if it can carry more cargo, it might still out-perform faster cargo planes just for sheer tonnage.
“In 1930, there was no way to detect [hydrogen]—it was a tasteless, odorless, invisible gas,” Prentice says, noting that today you can buy handheld detectors on Amazon that are capable of sensing hydrogen in parts per million. “Hydrogen will not burn at anything less than four parts per hundred, so long before you get to any risk of a fire with hydrogen, you can ventilate the area… Hydrogen is much harder to burn than people think.”
This got me wondering: Are there that many flights that their emissions alone would be problematic (assuming all other forms of emissions are eliminated with EVs and other green energy sources)?