Propellant-less electric spacecraft engine?

[Circlotron]

Don’t know whether this belongs in dodgy technology or not. It’s way beyond me.
 
https://electricspacecraft.org/index.html

[Refrigerator]

What's with their obsession with elephants?

Edit: look out for the jumpscare on page 43 

[JohnnyMalaria]

Sheesh. He seems to have a serious bee in his bonnet about PhDs. And he seem incapable of introducing this complex topic at an accessible level.

I gave up after page 7 (except a quick scan for elephants) and a look at his patent claims which are a million miles from a functioning propulsion system.

[bdunham7]

EmDrive was a widely-ridiculed concept until a NASA team announced that it appeared to work a little bit.  That result has not been validated or replicated.  This appears to be the same notion, repackaged.

https://en.wikipedia.org/wiki/EmDrive

[Syntax Error]

FYI, for space geeks and physics nuts, the Pioneer Anomaly is worth checking out as a form of 'free-energy' spacecraft deceleration.

https://en.m.wikipedia.org/wiki/Pioneer_anomaly