How can i measure lift of a model airfoil without a windtunnel?

Question

I have a science fair project coming up, and wanted to do it about aerodynamics. I was wondering how i could measure the amount of lift created by model wings made from Styrofoam , without a windtunnel. Is it possible to create a single beam balance and connect the wing to it. Than Use a fan to create airflow, and add weights to see how much the airfoil can lift. I really need a good quick answer. THnkazz :O

Answer 1

Your fan idea will work. If you could find a box you would have a makeshift wind tunnel it can be open so the airfoils will fit. The box will help dirrect the airflow.

Answer 2

It's going to have to be a really powerful fan.  Try mounting various airfoil sections on the end of an arm that sticks out a car window.  The arm could be made of wood or metal, and should be counterweighted so the weight of the arm is cancelled out.  Use a spring balance to measure the upward force on the arm, and use the common calculation for the lever arm to convert the balance reading to the actual force.

Have the driver run at various speeds and measure the lift.  Have fun!