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TAT vs SAT |
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kjmorris2023 
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Joined: 17 Apr 2021 Location: AZ Status: Offline Points: 5 |
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 Topic: TAT vs SATPosted: 04 Apr 2022 at 2:08pm |
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I have an A-36 and we did the Dynon HDX STC conversion. On the Avidyne we have it programmed so it shows us the temperature on the top in Celcius. Whereas the Dynon shows us OAT in Farenheight. My question is the Dynon shows TAT. Is this truly TAT? or is it really SAT or OAT?
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doog
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Joined: 27 Nov 2017 Location: KCCR Status: Offline Points: 73 |
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Posted: 05 Apr 2022 at 1:09am |
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Are you going more than 200 kts indicated? If not, there is no difference.
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bradthepilot
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Joined: 07 Jan 2017 Location: St. Paul MN Status: Offline Points: 65 |
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Posted: 22 Apr 2022 at 7:38pm |
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The Dynon is displaying TAT; actual SAT or OAT would require a separate probe dedicated to the display.
At 150kts, there should be a 3º C difference between the two. A useful approximation that is easier to calculate than the "real" formulas taught at uni is TAT=SAT + (KTAS/100)^2, where both TAT and SAT are ºC. |
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Brad Benson
RV-6A N164BL |
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