TAT rule of thumb

[Gpulce]

hi guy,
are there anyone that know a rule of thumb to calculate the Total air temperature?

Thank you very much!!
Gpulce

[n90bar]

On the CRP -5 (Pooleys) there is a blue scale which gives you the Ram rise, dependant on your TAS. You can add this figure to your SAT to give you a rough indication.

[High Wing Drifter]

Tat = Sat + (tas/100)^2

[Gpulce]

thanks to every one for the informations!!:D
Bye
gpulce