Gun powder.
I haven't read all your links but whatever catagory the engines fall into probably includes black powder and reloading supplies. I think the NRA will get involved if that is the case.
Space/Science » in reply to The Death of Hobby Rocketry?
I haven't read all your links but whatever catagory the engines fall into probably includes black powder and reloading supplies. I think the NRA will get involved if that is the case.