I have been folowing this thread. I have a question about the steering: I get it's bang bang, but what actuates it? is it a spring returned solinoid or a motor? I am thinking there should be a way to pulse the steering to simulate proportinate control. Does it really go full left or right with just 1 frame of command?

Also, as Dave suggested, can you create it so the demo version could be used? Maybe write some subroutines to "include" so all the power of PBP isn't required.

Then if some of the students are really intrested and want to go further, they can be pointed to PBP for their parents to purchase? As a parent, I would gladly buy a copy for my kid(s) if they were to show me they actually wanted to play with it. It would be far better than an x-box orother such stuff.