Instructables
Picture of Cardboard Wind Tunnel
In this instructable, which happens to be my first, I will show you how to make a working wind tunnel using only a few easy-to-obtain materials. It only takes a few hours to make, and can generate high enough wind speeds to easily lift up a styrofoam airfoil. I built this to help me with my science fair project last year at school, in which I tested to see if different airfoil designs would generate more lift than a regular airfoil. Anyway, here's the Instructable.
 
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Step 1: Materials and Tools

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All you need to make this wind tunnel are the following items:

-  cardboard
-  duct tape
-  cardboard mailing tubes
-  box fan
-  glass or plexiglass (about 8" by 8")
-  scissors
-  hobby knife or box cutter
-  tape measure
-  hot glue gun w/ glue sticks
-  saw

Step 2: Make the Tunnel

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The tunnel is the part that the air flows through. It needs to be straight so that the wind will be straight.

-  Draw the outlines for the four sides of your tunnel on cardboard. It should be about 5 feet long.

-  Cut out the sides using your box cutter or hobby knife.

-  Cut an 8-inch section from the middle of the top piece. Keep it. You'll use it later.

-  Then cut a square or rectangle large enough for your clear window out of the front piece.

-  Duct tape your window into the square, and then duct tape the whole tunnel together. The section that you cut from the middle of the top should only be taped to the back piece. It will be used as a door to allow you to reach into the tunnel.

Step 3: Make the Funnel

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20pbaxter3 months ago
Could you make this out of wood???
Derpthetroll9 months ago
Nice I am doing a science fair project on wing types and some of your info really helped inspire me

Cool! How are you making your wings!

Out of quad paper
Schmidty162 years ago
dude u could put a hole in the bottom and vook it up to a vent so that warm or cold air be directly blow on you
beehard443 years ago
i'll make a small one with a PC fan
but nice idea with the cardboard tubes, simpler than honeycomb
randofo3 years ago
Very nice. Do you have a video of it working? It would be cool to see some airfoils floating inside of it.

Also... "Congradulations!" should be "Congratulations!"
Goalieguy (author)  randofo3 years ago
No, I don't have a video. I have a picture of an airfoil in it, though. I'll see if I can attach a picture to a reply soon, but I don't have the picture on my iPod touch, which is what I'm typing on now.