Maybe you can run some numbers for me.
I'm toying with the idea of writing a hard scifi story. What would be the numbers of a photon drive for a 30,000 to 50,000 ton starship traveling at .2c? My original idea was for a thermonuclear Orion, but I've always been intrigued by photon propulsion. My skills at such math are lacking, so any help would be of great benefit.