Quick and easy Wind Tunnel in 1 hour

[n27sb]

I decided to go ahead and whip up a small wind tunnel to test stability on new designs. I usually use Rocksim and it predicts well but it feels better to do a real world test.
I built this today using just materials from my shop. It is a simple low velocity tunnel. I did not want something bulky to store.

 

[Handeman]

pretty cool.

What air speed you get?

Does the fan draw air? I'm thinking blowing the air would be more efficient, but that's a WAG.

 

[n27sb]

Maybe 18 kts or so. Plenty to check stability or flow.
The fan draws, easier to get smooth flow.

 

[dhbarr]

It is my intent to have a combination curing oven / wind tunnel once the shop is more complete -- this lets me know that even if I'm crazy, I'm not alone!

 

[5x7]

Note tubes at the receiving end that act as flow straighteners also. Very Nice!

 

[KenECoyote]

I was thinking of making one myself for some of my experimental designs that rely on high speed wind flow for stability...not easy stuff to test at club launches.