IFD 5 Series & IFD 4 Series Touch Screen GPS/NAV/COM

Print Page | Close Window

TAT vs SAT

Printed From: Avidyne
Category: Avidyne General
Forum Name: IFD 5 Series & IFD 4 Series Touch Screen GPS/NAV/COM
Forum Description: Topics on Avidyne's IFD 5 Series and IFD 4 Series Touch Screen GPS/NAV/COM
URL: http://forums.avidyne.com/forum_posts.asp?TID=2348
Printed Date: 18 May 2024 at 12:25am
Software Version: Web Wiz Forums 12.01 - http://www.webwizforums.com

Topic: TAT vs SAT

Posted By: kjmorris2023
Subject: TAT vs SAT
Date Posted: 04 Apr 2022 at 2:08pm

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?

Replies:

Posted By: doog
Date Posted: 05 Apr 2022 at 1:09am

Are you going more than 200 kts indicated? If not, there is no difference.

Posted By: bradthepilot
Date Posted: 22 Apr 2022 at 7:38pm

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.

-------------
Brad Benson
RV-6A N164BL