Jump to content

Sign in to follow this  
Guest erjboy

TAT and SAT

Recommended Posts

Guest lou ross

Could someone give me an explanation of these two temps? thanks, louross.

Share this post


Link to post
Share on other sites
Guest erjboy

Hi Lou this one is pretty easy....Well SAT or Static Air Temp is basically your outside air temperature that you read directly from a thermometer....Now the difficult one,....TAT or Total or Temperature is SAT corrected for compressiblity, what I mean you the is as an object moves thru the atmosphere it gets heated up by friction, so TAT is always warmer up in the Altitudes...For instance yesterday we were cruising the 767 at FL380 and the SAT was around -45C but the TAT was only -20C this is due to compressiblity, its warmer..Anyway I hope this makes it a little clearer, hope I didn't confuse the S%^^& out of you...Later

Share this post


Link to post
Share on other sites
Guest

Hi Joseph,What is the specific use of TAT?Why would you want to know TAT if it is a temperature that is so dependent on external variables like speed, height etc.?thx!Gideon

Share this post


Link to post
Share on other sites
Guest erjboy

Well for us we use it for Engine Anti-ice purposes...When I was flying the ERJ's for eagle we use to turn on the Anti-Ice on for TAT 10C or colder with visible moisture such as clouds fog and rain. But boeing uses SAT for both ground and flight opps, so in the case we really don't use TAT much but SAT.. That is the only thing I can think of for using TAT....Hope this helps again...

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
Sign in to follow this  

  • Tom Allensworth,
    Founder of AVSIM Online


  • Flight Simulation's Premier Resource!

    AVSIM is a free service to the flight simulation community. AVSIM is staffed completely by volunteers and all funds donated to AVSIM go directly back to supporting the community. Your donation here helps to pay our bandwidth costs, emergency funding, and other general costs that crop up from time to time. Thank you for your support!

    Click here for more information and to see all donations year to date.
  • Donation Goals

    AVSIM's 2020 Fundraising Goal

    Donate to our annual general fundraising goal. This donation keeps our doors open and providing you service 24 x 7 x 365. Your donation here helps to pay our bandwidth costs, emergency funding, and other general costs that crop up from time to time. We reset this goal every new year for the following year's goal.


    14%
    $3,530.00 of $25,000.00 Donate Now
×
×
  • Create New...