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Forum: Tech Log

29th Mar 2012, 16:20

Replies: 22

Takeoff and Climb thrust w/ flex/derate

Views: 15,968

Posted By LeCoyote

Yep, I was referring to the process where derated...

Yep, I was referring to the process where derated TO thrust washes out to max climb thrust, thank you mutt.

I now realize that the logic behind this can be quite complex, considering the CI and...

Forum: Tech Log

27th Mar 2012, 10:37

Replies: 22

Takeoff and Climb thrust w/ flex/derate

Views: 15,968

Posted By LeCoyote

Ok, thanks a bunch. I guess the bottomline is, in...

Ok, thanks a bunch. I guess the bottomline is, in our environments where an unrestricted climb is inlikely (LFPO and LFPG are fairly similar in that regard), thrust doesn't increase until about...

Forum: Tech Log

27th Mar 2012, 10:11

Replies: 22

Takeoff and Climb thrust w/ flex/derate

Views: 15,968

Posted By LeCoyote

Thank you Denti. This leads me to one (hopefully)...

Thank you Denti. This leads me to one (hopefully) last question.
If you are doing a derated/flex takeoff AND climb, assuming A/T is on, what drives the airplane to increase N1/EPR (and therefore...

Forum: Tech Log

26th Mar 2012, 05:17

Replies: 22

Takeoff and Climb thrust w/ flex/derate

Views: 15,968

Posted By LeCoyote

Good morning, @Denti: thanks for correcting...

Good morning,

@Denti: thanks for correcting my assumptions. I think that almost completes the (abridged) picture for Boeing derated TO procedures and that's what I needed. I just have one more...

Forum: Tech Log

24th Mar 2012, 10:39

Replies: 22

Takeoff and Climb thrust w/ flex/derate

Views: 15,968

Posted By LeCoyote

Thank you guys for your feedback. TSIO540,...

Thank you guys for your feedback.

TSIO540, what you're saying does indeed confirm the logical hypothesis that we had, ie. that the CL detent commands a "FLEX" climb thrust. One question though, if...

Forum: Tech Log

20th Mar 2012, 19:47

Replies: 22

Takeoff and Climb thrust w/ flex/derate

Views: 15,968

Posted By LeCoyote

I could understand a washout based on MN, but I...

I could understand a washout based on MN, but I don't get why it would start at M.3 : that's hardly 200KTAS at SL if I'm not too rusty, so you'd get there pretty quickly
So if the 744 washout is...

Forum: Tech Log

20th Mar 2012, 11:03

Replies: 22

Takeoff and Climb thrust w/ flex/derate

Views: 15,968

Posted By LeCoyote

Thanks for your input main_dog, it sure clears...

Thanks for your input main_dog, it sure clears things up a bit.
Of course, it makes sense that the pilot should always be able to decide on a higher CLB setting.

This info about buses' "bumping...

Forum: Tech Log

20th Mar 2012, 08:34

Replies: 22

Takeoff and Climb thrust w/ flex/derate

Views: 15,968

Posted By LeCoyote

Takeoff and Climb thrust w/ flex/derate

Hello,

I am still looking for hands-on experience and information regarding Flex/Assumed-Temp and Derated takeoff scenarii. In particular, I would like to know what happens (or usually happens)...

Forum: Tech Log

27th Oct 2009, 13:19

Replies: 15

Engines ratings and takeoff performance

Views: 2,449

Posted By LeCoyote

Hi there, I am OK with the basic concept of...

Hi there,

I am OK with the basic concept of getting the lowest possible thrust setting while still being able to comply with the requirements.

What I am more interested in is which of these...

Forum: Tech Log

25th Oct 2009, 09:14

Replies: 15

Engines ratings and takeoff performance

Views: 2,449

Posted By LeCoyote

Hi Denti, Interesting... Let me see if I get...

Hi Denti,

Interesting... Let me see if I get this right: you look up your tables, and at some point the N-1 climb gradient does not allow you to clear the obstacles, so you use the next available...

Forum: Tech Log

25th Oct 2009, 08:47

Replies: 15

Engines ratings and takeoff performance

Views: 2,449

Posted By LeCoyote

Hello there, Thank you all for your feedback...

Hello there,

Thank you all for your feedback !

Thought as much. I guess what I am more interested in finding is then Max Continuous Thrust. I found figures that suggest that MCT is approx 93%...

Forum: Tech Log

23rd Oct 2009, 11:31

Replies: 15

Engines ratings and takeoff performance

Views: 2,449

Posted By LeCoyote

Engines ratings and takeoff performance

Hello there,

I am currently investigating the (vast) topic of takeoff and climb performance in airliners, and I am looking for some information regarding thrust settings during the initial part of...

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