Found a neat circuit to try

[Aaron]

Well it's been so slow here lately here's a circuit to stir up discussion

 

www.aaroncake.net/circuits/airflow.htm

 

It's an adjustable airflow detector. I was thinking about instrumenting the engine cooling ducts with something like this, my only reservation is the flimsy nature of the filament. I was thinking of replacing the filament with a length of nichrome wire, pulled taut across a tube, any thoughts or opinions?

[John Slade]

Isn't this the same principle as turbo mass flow sensors on cars?

They handle significant airflow. They'd just need calibration. Maybe a visit to the breaker's yard is in order.

[Aaron]

Good idea, this gives me a circit I can drive any used MAF with. Now I just need to find some small, light MAFs...