...the physics that makes prompt neutron reactions work in weapon-grade material is the same as the physics that makes fission reactors work. On the atomic level, it's the same thing happening; all the changes are a function of how much of it you do.Ellindsey wrote:For slow fission reactions in uranium, yes. There was always the possibility that some odd change in physics would cause fusion to work differently, or maybe prompt neutron reactions in weapon-grade fission material would be different or something. Unlikely, but it was still possible. Good to have it ruled out.
Fusion working differently I could maybe see, but I'm dubious of that too, because (once again) the fundamental physics is the same. Fusion works because of how nuclei work; if deuterium didn't fuse, plutonium shouldn't fission.*
*Was so tempted to say "fizz..."
Oh yeah, it works great for that.Jeremy wrote:True. An Orion engine will enable a ground launch of a very massive payload though. So it could be a staged system and left in Earth orbit.
I suppose it is most useful for an emergency situation or an interplanetary warship.
It kind of makes sense to use Orion to launch thousands of tons of material into orbit, but if you're going to be using an ion engine for the rest of the trip anyway, I'm not sure it makes sense to lug the pusher plate along with you.