View Full Version : A320 flex choice
I-WEBA
2nd Dec 2011, 20:55
Hi everybody, when you calculate the flex temp using LPC do you choose the highest temperature or you choose a lower temp that gives you more margin than the highest flex?
kellykelpie
3rd Dec 2011, 00:10
Highest temperature (whatever the LPC gives you - only one temp is given...)
Rick777
4th Dec 2011, 05:56
there is only one temp given, and it gives quite a bit of pad. If you need more just go max.
sultangc
26th Dec 2011, 04:28
i think highest flex temperature, is the better option mostly, and optimun flaps is always or almost always flaps 3, but some time using flaps 2 is giving you same flex temperature but better V2 (higher) so shorter 3rd segment. Company ops manual should give you this politics use of flex temp, if not highest is the best.
highest is the best.
Based on what? Engines savings or performance?
sultangc
26th Dec 2011, 23:21
You bet, fuel and engine maintenance, due to spread of hot point check. NOT perfomance, but you have always MAX thrust available TOGA
You bet, fuel and engine maintenance, due to spread of hot point check So you have statistical analysis of the savings associated with deep derates?
compressor stall
28th Dec 2011, 23:35
"The first degrees of flexible thrust have an impact on maintenance costs about 5 times higher than the last one" from FCTM