What is a detonation engine and how does it work?

Question

So i know it could be an alternative to rocket engines for spaceflight but thats how far i am at. How does it work?

In: 4

Answer 1

There was a sci-fi project called Project Orion at DARPA that would have used nuclear explosions to generate pulses to propel a spacecraft.

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