u/MeanYak9933

Hello, I'm working on a low speed wind tunnel, maximum CSA of 250*250mm with total length of 1.05m, I'm trying to synchronise my idea of having variable wing angle of attack whilst measuring pressure and force like drag and lift.

The idea i researched is using load cells for force, but because my fans are 2 PC fans, the speed isn't high but I have plenty of pressure and airflow.

I also wanted to measure pressure at certain point of the wing or at least before and after the wing and found pressure sensors that you hook up a tube to and that gives pressure differential reading.

Concerns i have is that the calculations i did say that my forces are really low so much that its less than 2grams. I'm not sure on how to proceed or if its even viable.

Hi, I'm building a diy wind tunnel, but im having some issues with working out how to connect the pc fan to a power supply variable unit. I need the most simple and low cost way possible. I'm also gunna code the arduino to control fan speed. The fan i have is a arctic p14 max and the power supply.

Thanks.

Also i originally planned to go direct to arduino but i didnt know that arduino had too little voltage not sufficient for optimal use of fan hence using external psu.