>Another option is to do the job with an electronic pressure sensor. The
>mechanical version depends solely on the fact that the airflow is keeping the
>vane raised, when the airflow ceases at the stall the vane drops and makes
>the switch. In effect it is a crude, but effective pressure switch. I would
>think that a small tube mounted at the correct angle to leading edge with an
>electronic pressure sensor at the other end and an appropriate circuit would
>give the desired result. Once you have the tube in the correct position then
>the electronic version has a benefit in that you can easily alter the
>sensitivity of the system with the turn of a potentiometer.
This is sort of the scheme that Russ Light has designed, except that he has
found a 10 X 10 X1mm thick pressure sensor, and it is reference to static
pressure. I'll be seeing him in a couple of days, and try to hurry him
along. No point in several of us trying to reinvent the wheel.
Miles
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