My club is building a rocket for a competition. We've been doing a bit of research, but it we haven't decided on fuel. We're also on planning to get an engine w/ 400lbs of thrust.
Are there any suggestions? Pros and Cons. Need not worry about money, because the school is funding it. Take into consideration time (4 mos) and safety. Right now, it's propellant that we're talking about. Thanks!