How would you recommend to measure the wind stream velocity? The fan creates a vortex in which has different velocities at different points in the air stream.
The air inlet is a fixed position on the front nose of the car. therefore a NACA duct is not a possiblily.
The idea of using a brushed fan with an LED is a good one, though the brushless fan spins at 20,000 rpm which I do not have the resources to find a brushed motor with the same specs to...
I am trying to see what the best way to measure the cfm generated from a fan with a brushless motor. The fan is in a 3" circular housing. The fan system is used inline with brake ducting in a race car. I have two issues in trying to measure CFM.
1. Measuring CFM through the 3" ducting...
