Another way to not make sure the car went a different direction was to make sure the bands released and didnt get twisted back up. If they did that would result in a car that went backwards. The tighter we got them the father the car would go. It turned out to be about 4 bands that were tied together. The car was able to go because of the force that was being built up with the bands as they tightened. The back wheels were also put on tight so the car went straight and the axle was secured with glue to the rotating piece of wood. The only force acting on the car were the bands and with the cement ground there was no friction, so the car had a smooth ride. The speed did slow down however after the initial take off but we wanted it to go slower as it approached the wall for the safety of the egg. Overall our project went really well.
Our car out of all the classes was 4 for distance and 3 for closeness to the wall so I would say our project went pretty well. The second trial was better than the first only because 23 feet was too close and it needed to be pulled back. Once we moved the car back to 26 feet it got .3 cm away from the wall after bumping it. It was still too close because it did dent the egg but didnt crack it. Our car had the right amount of weight to carry the egg so it wasnt off balance and the axle in back along with the bands were perfect on the day of the release. Overall I think our car was perfect and did exactly what we wanted. The only thing that would have made our car better would be to move it back farther since it seemed to still tap the wall.