Ed wrote:

Some years back there was a complete description of a thermistor based
system in Sport Aviation. You might contact the research department or
whatever they call it.

I recall reading details of a thermistor sensor autopilot system years ago.
A little air pump blew a small jet towards an array of four thermistors
in a box. If the aircraft pitched, then the jet was deflected more
towards one thermistor than its opposite. Both thermistors went to an op
amp. Another pair of thermistors were responsive to yaw rate and turn.

Such a neat conception! I talked to him on the phone. He worked
(works) for a NASA lab - Ames, if I recall. Still have the article
somewhere.

Brian W