Need help constructing a wind tunnel

[chappy-13]

i'm currently building a wind tunnel for year 11 physics and need help mounting the aerofoil. The wind tunnel is basic (just cardboard and is circular), and i need a way to mount the aerofoil inside. The mounting has to be sturdy so that the aerofoil can have an adjustable angle of attack and will keep the same angle of attack when the fan is blowing on it, however it needs to be relatively free so that i can measure the lift using a fishing line which is attached to a triple beam balance or spring balance/scale.

any ideas?

p.s the aim of the experiment is to determine critical angle of attack, and angle of attack which produces zero lift, etc

 

[redargon]

I discussed something similar with someone before, have a look: https://www.physicsforums.com/showthread.php?t=251942

 

[NatSusan]

.Hi there! Building a wind tunnel for a physics project sounds like a fun and challenging project. I have a few suggestions for mounting the aerofoil inside your wind tunnel:

1. Use wooden or plastic dowels: You can attach wooden or plastic dowels to the sides of your wind tunnel using strong adhesive or screws. These dowels can then hold the aerofoil in place and allow for adjustable angles of attack. You can also attach the fishing line to the dowels for measuring lift.

2. Use binder clips: Binder clips are a great option for holding the aerofoil in place. You can attach them to the sides of your wind tunnel and use them to hold the aerofoil at different angles of attack. They are also easy to adjust and won't interfere with your measurements.

3. Use a PVC pipe frame: If you have access to a PVC pipe cutter, you can create a frame for your aerofoil using PVC pipes. This will provide a sturdy and adjustable mounting solution for your aerofoil. You can also attach the fishing line to the frame for measuring lift.

4. Use a mounting bracket: You can purchase or make a simple mounting bracket that can be attached to the sides of your wind tunnel. This will allow for easy adjustment of the aerofoil's angle of attack and provide a stable platform for measuring lift.

I hope these ideas help! Good luck with your project and let us know how it turns out.