with apologies to Ogden Nash...
I believe its alive and well, OK alive maybe...The latest incarnation: Bring your asbestos underpants.https://www.youtube.com/watch?v=bKHz7wOjb9w
Not in common use, but some progress has been made...https://youtu.be/WREyAicJXkM
Both are frickin' crazy! The Swiaa are a lot more serious about it :-)
Maybe a pulsejet . ?>
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