I have always wanted to fly so. i need to know how many balloons to put on top of my car?
Find out how much weight one balloon can lift. Divide 4,000 by that number. It's 1st grade math, really
If you plan to attach the balloons to a single point on your car, plan to replace that part after two tons plus is pulling on it. You will need a platform to support your car, and the weight of the platform needs to be determined. Plus the weight of tie down chains, if applicable. The balloons would need to be attached to all four corners of the platform. More for the heavy end, less for the lighter end. Basic Internet research will reveal how much weight one helium filled common party balloon will lift. Better yet, acquire 36 inch balloons for the task. Once you find out how much this will cost, you will change your mind and just go for the mathematical calculation instead. Leave the flying to your dreams. But to pursue it even further, see the reference below.
