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#1
November 30th 19, 08:21 PM
posted to rec.aviation.soaring
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Pitot/static leak issues when using a "squat switch"
Actually out of curiosity I looked at the pin out diagram for a Garmin transponder. There’s no pin out for a squat switch. Guess they do air-ground logic through programming as quoted by AOPA. Too bad they don’t make a smaller transponder.
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#2
November 30th 19, 10:08 PM
posted to rec.aviation.soaring
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Pitot/static leak issues when using a "squat switch"
I'm pretty sure the Trig transponder allows the GND/ALT determination to
be made without use of a squat switch. On 11/30/2019 1:21 PM, Charles Longley wrote: Actually out of curiosity I looked at the pin out diagram for a Garmin transponder. There’s no pin out for a squat switch. Guess they do air-ground logic through programming as quoted by AOPA. Too bad they don’t make a smaller transponder. -- Dan, 5J
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#3
December 1st 19, 12:37 AM
posted to rec.aviation.soaring
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Pitot/static leak issues when using a "squat switch"
How is Trig determining ground / alt without a switch?
I'm planning on a manual switch. I'll just add setting it to alt in my pre-takeoff instrument set scan.
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#4
December 1st 19, 12:47 AM
posted to rec.aviation.soaring
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Pitot/static leak issues when using a "squat switch"
It's been a while, but I believe Trig uses GPS ground speed to determine
flight status.Â* The concern is about gliders flying in wave and clocking extremely low ground speed resulting in the transponder reporting the glider on the ground. On 11/30/2019 5:37 PM, Mike N. wrote: How is Trig determining ground / alt without a switch? I'm planning on a manual switch. I'll just add setting it to alt in my pre-takeoff instrument set scan. -- Dan, 5J
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#5
December 1st 19, 01:27 AM
posted to rec.aviation.soaring
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Pitot/static leak issues when using a "squat switch"
On Saturday, November 30, 2019 at 6:47:48 PM UTC-6, Dan Marotta wrote:
It's been a while, but I believe Trig uses GPS ground speed to determine flight status.Â* The concern is about gliders flying in wave and clocking extremely low ground speed resulting in the transponder reporting the glider on the ground. On 11/30/2019 5:37 PM, Mike N. wrote: How is Trig determining ground / alt without a switch? I'm planning on a manual switch. I'll just add setting it to alt in my pre-takeoff instrument set scan. -- Dan, 5J the trig electrically allows gnd/alt determination several ways, not all are approved. 1. no determination 2. gps determination (problematic in wave for gliders) 3. manual switch using the "squat switch input" 4. pitot pressure squat switch from peregrine. there may be other schemes, but these are some. Scott
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