Originally Posted by
Spir4
Hi,
A simple question: why is using flex temperature on contaminated runways not allowed?
Using flex temperature still uses the Vmcg for the full rated thrust, so it's not that you would lose control is it?
With a contaminated runway you want to get of the runway ASAP, but why is a derate allowed then?
I've searched the forum for similar questions, but none gave me a definite answer.
Thanks!
I recommend downloading “Getting to Grips with Performance” an Airbus publication and start at section C 7 Flexible and Derated Takeoff and careful study should answer all of your queries.
You may then be tempted to explore this document further for more gems.
SB