Alright, so i tried to post a video on this thing but i can't seem to do it. so I'll just type what happened. The video was one that Jesse and I found on youtube (http://www.youtube.com/watch?v=seaUNlrSK0Q&feature=related) of this guy teaching us how to make our own balloon car. This video really helped because in our minds our balloon cars were reletively big to the one he made. He made a balloon car out of a poker card, so it was really small. This for us changed everything because we are now thinking of building our car small like his. Although we're not sure how far the car went, judging from the video the car should pass the 5 metre mark.
i'll try if i can put the video on later, or other videos if i can.