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ledow t1_iyjjd6o wrote

Reply to comment by LucyEleanor in New device can make hydrogen when dunked in salt water by TurretLauncher

Hydrogen needs to be stored at 10,000 psi to come anywhere NEAR the energy density of a conventional fuel.

Though you can get more energy per kilo of hydrogen, you can't do that without basically compressing it to enormous pressures or taking up a ton of room, or using up lots of chemicals and energy to lock it into other substances (which add to the mass).

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LucyEleanor t1_iyjjhkb wrote

Well drones do use mini scuba tank guys full of compressed h2. Idk the psi tho

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