Okay, this is a basic overview of my launcher:

1. The power house- Two wheels rover wheels (like in the mars exploration rover) powered by 2
9v motors. The wheels grip the disc very well. By placing them to the side of the CD it puts 
spin on the CD making it fly straighter and farther.

2. Pneumatics- The pump (powerd my its own 9v battery pack) stores the pressure that powers 
the little piston. When the 9v motor attached to the switch moves , it make the piston 
extend or retract. 

3. Loading- to load make sure the piston is retracted. Then turn off evrything. Push the CD 
past the launching wheels. Turn on the 9v batterypack- it gives more power than the RCX does
- then turn on the program which is only "A forward". the piston extends and the CD goes flying
(I count turning on the battery pack to power the launcher as pre-launch prep. - it 
has no human control besides on or off - because it has to warm up before the disc can be 
launched )

4. Conclusion- After finding the perfecr angle, the three distances I recorded were 71 inches
61 inches and 63 inches - an average of 65 inches. I spent 3 weeks on the two wheel launching
assembly alone and I hope that my launcher meets your high standards.