This mod is not known to work with the latest version of Kerbal Space Program. Proceed with caution.
This is based on Nyrsth's USAF Orion Mod (it's in what I've uploaded, by permission, under my mods).
I shrunk it. It's half scale, like a lot of KSP replica rocketry, so instead of a 10m pusher plate, it's 5m. BUT I've also included the 86foot edition as well (again at half scale, so 43foot or ~13.1m). And I've taken the liberty of half scaling the propulsion devices as well, which isn't technically possible, but it's a game, and has many more objectionable impossibles in it.
I've split the engine. You now need the main engine piece, a floor or five of bomb conveyor (each floor piece has one type of bomb loaded) and on top of that an Engine-Payload-Interface, which is a fancy way of saying top.
Some code changes as well.
There's a reasonably accurate portrayal of the effects of atmosphere. Orion's have the opposite issue as rocket engines, they work really well in an atmosphere, less so in a vacuum. By a bit over an order of magnitude. So start small. :-) Also, I scaled heating with atmosphere and velocity. Basically, a nuke in an atmosphere creates a fireball. If the code estimates you might spend some time in said fireball, it applies some extra heat. Using an Orion to decelerate in an atmosphere is risky business.
Raw stats are from the beginning of time until now. Each follower and download entry represents one hour of data. Uneventful hours are omitted.