DARPA developed a really slick PDE that runs on hydrogen, and is printed on a
3D printer in plastic. It’s amazingly simple, readily scalable, high
performance… but unfortunately, classified. The thrust to weight ratio is
spectacular, by the way. That’s one of the best features of a PDE. This one
also doesn’t pulsate.
Sent from Mail for Windows 10
From: Jim Davis
Sent: Monday, January 27, 2020 9:41 AM
To: arocket@xxxxxxxxxxxxx
Subject: [AR] Re: Orions and PDEs (was Re: More MAX delays.)
As I've mentioned before, I kinda gave up on PDEs when I ran into a paper
explaining how wonderful they were and how they would soon replace all
other kinds of rockets -- in the May 1957 issue of the ARS Journal.
