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Lancair lists an air speed switch that is almost
identical to that used in the HVAC industry to monitor pressure drop across
air filters.
It connects to the pitot and static lines.
They sell it as a squat switch.
For the electronics, I think my previously posted
idea is a bit simpler.
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I'm going to build the gear not down warning system suggested by Randy
Stuart in an earlier email. I thought Aircraft Spruce had a airspeed
sensing switch, but I couldn't find it in their catalog. Can any of you
help me find a source for the pressure switch?
I've never had a
close call with the gear in three plus thousand hours of retractable time,
but I've always been a little uneasy with no warning system in my LNC2. I
had hoped that I could talk Blue Mountain Avionics into building a warning
system into their EFIS, but that didn't work out. Randy's system looks
great to me and I'm eager to try it. I've attached Randy's drawing just in
case others might want to revisit the idea.
Thanks -- Bill
Kennedy
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