BANANA CAR BALLOON EXPERIMENT

DID NOT WORK!!! PLEASE READ!!! MY DESIGN WAS FAULTY, the exhaust diameter hole i felt was to small to provide adequate thrust to propel the car forward. and if you see by the picture of the section view there is an internal chamber that i thought would provide compression but probably lead to its down fall. so remix it to remove the chamber to allow a straight stream of air. and let me know how it goes. perhaps using a combustible like helium to compress in the chamber with the tapered exhaust a