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NASA Successfully Tests Revolutionary Rocket That Could Get Us to Mars Faster
(www.sciencealert.com)
This is a most excellent place for technology news and articles.
Wankel and Mazda shine blessings upon you and your RX family
The wankel and rdre aren't really related, but they're similar in that they're both oddball engines with surprising performance.
Of all of my near future rocket engine predictions, a working aerospike rdre was not on my list... I'm honestly very impressed!