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A comment on UCF researchers develop new rocket-propulsion system. Parent comment

Re:UCF researchers develop new rocket-propulsion system by Armisael16 on Sunday May 03, 2020 @09:13AM (#23058792)
It isn’t a question of reusable type - you need to have fuel and oxidizer to burn things. A truck can use atmospheric oxygen for the oxidizer; a rocket can’t.

I also imagine that the extra weight of the aluminum pucks would tank your Isp (though I suppose you might be able to make back some tank weight).

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Re:UCF researchers develop new rocket-propulsion system by sitkack on Monday May 04, 2020 @12:11PM (#23069754)
I willfully? missed that the O in the water binds to the Al so is unavailable for combustion (it has to, otherwise what gets consumed?).

Oh, another take, it is a molecular pump that removes oxygen from the environment and turns it into water, via burning.

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