Quote from Bob Smith :

I'm finding that site quite an interesting read, it makes me want to have a go myself!

LFS Forum challenge!

just some ideas:

1. you need a nozzle, to straighten the airflow. You want thrust, not noise.
2. a three wheeler. Less friction than four.
3. rather long design to keep it going straight
4. for the fast one: everything as light as possible
5. for the longrange one: put weight on the wheels, use them as flywheels, so that it keeps going once its running
6. keep the nozzle in the middle of you chassis, or above the rear axle, to eliminate "lever arm of a force(?)" effects if the nozzle is not 100% straight
7. CDs work well as wheels

Quote from ACCAkut :

5. for the longrange one: put weight on the wheels, use them as flywheels, so that it keeps going once its running

7. CDs work well as wheels

Please clarify...?

Quote from ACCAkut :

7. CDs work well as wheels

Can't be as large as that >_> Maybe I'll get a Powerade Drink cap.

I don't really know how to explain it understandable in english
Maybe this article http://en.wikipedia.org/wiki/Flywheel(or the conresponding one in your language) can help.

For the wheels, as long as they turn easily everthing round will work. Whats the biggest diameter allowed?

how big can it be cause i have a simple idea ****ing hard

Well as long as it's not too large... Please share