Do ionic thrusters or pulsed microwave thrusters fall under the 'similar' category? Also, if what I was looking for was in the published literature, I wouldn't need to resort to asking for help on forums, right?
How did you find PF?: Google
Hi folks! Title sums it up pretty well. Alternative propulsion is cool, despite the amount of woo that tends to permeate the topic. I enjoy finding first-principles solutions for far-out claims.