[gumby79]

8th grade .
I took an elective called exploring Technologies 1 second semester number 2.
In 1 we built
1 a kinetic energy rubber band car.
We did full layout designs with abace meterial of 12" of 1/2 x 3/4" jard wood . More about practical application of ratios and Leverage
2 a CO2 rocket car .
oneMaybe this one.

We receved a kit that consisted of a block of balsa wood 300x100x50mm with a chamber bored for a standard CO2 cartrage. 4wheels axels and an instruction book.
We were completing amongst each other as when finished they were drag raced 100m . We started on paper and desined a body shape in 2 plains. This got the wheels turning
What forces are going to be expected at over 100mph? Lift, drag, thrust , thrust vector, aero balince, and vortex sheading.
We got a good example of poor aero balince . One car had too much down force aft and lift in front ,it snaped in hafe . One had lift it tryed to fly like a side winder missle. .