FLEX TEMP

[jcbourne]

What is the minimum acceptable flex temp for the a320?

[Lord Spandex Masher]

Minimum? Or Farhenheit?

[compressor stall]

And which engines.

[gAMbl3]

Flex temp cannot be lower than T ref or OAT.

[Jwscud]

A large number of engines are flat rated up to ISA+15 so it is only above that temperature that you get thrust reductions when using assumed temperature/flex/whatever. This is certainly the case with the CFMs.

[Cough]

Our 319's with IAE's are flat rated to ISA+40, max flex temp is ISA+65...

[de facto]

Our 319's with IAE's are flat rated to ISA+40, max flex temp is ISA+65...

OP is talking about minimum Flex.
Have a loook at your fcom...and look. for MINIMUM ASS or FLEX temp.

The Fmc wil not allow you to enter a flex temp that would calculate a thrust setting higher than your max thrust rating(if you use derate,max thrust for your derate) for actual OAT and PA.

The engines are rated at Sea level and isa+15c, so at sea level your min flex should be about 30c.