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Forum: Tech Log

10th Jul 2012, 09:25

Replies: 29

Noise abatement

Views: 13,111

Posted By lederhosen

Things have changed a bit over the last 20 years....

Things have changed a bit over the last 20 years. The vast majority of takeoffs are now twin jets, which as has been pointed out are most often limited by the 2.4% climb gradient engine out scenario...

Forum: Tech Log

9th Jul 2012, 13:25

Replies: 29

Noise abatement

Views: 13,111

Posted By lederhosen

Thanks for everyone's input including those via...

Thanks for everyone's input including those via private mail. I am particularly interested how others determine takeoff N1 setting and V speeds and how climb gradients required by particular SIDs are...

Forum: Tech Log

9th Jul 2012, 06:36

Replies: 29

Noise abatement

Views: 13,111

Posted By lederhosen

I was hoping that someone could explain why our...

I was hoping that someone could explain why our current procedure makes sense from a noise point of view. So far things seem to be going in the opposite direction.

I am interested that only one...

Forum: Tech Log

8th Jul 2012, 06:04

Replies: 29

Noise abatement

Views: 13,111

Posted By lederhosen

Thanks for those contributions, I have looked at...

Thanks for those contributions, I have looked at the references you suggest Mutt. The community noise document is pretty vague, in summary it says noise is a difficult subject to quantify and one...

Forum: Tech Log

7th Jul 2012, 10:41

Replies: 29

Noise abatement

Views: 13,111

Posted By lederhosen

From the deafening silence of the experts other...

From the deafening silence of the experts other than Denti (whose input is as always interesting) it seems that noise abatement does not seem to be of much concern to most people or perhaps somebody...

Forum: Tech Log

7th Jul 2012, 07:49

Replies: 29

Noise abatement

Views: 13,111

Posted By lederhosen

That is indeed an anomaly. The lowest allowable...

That is indeed an anomaly. The lowest allowable climb thrust is above the thrust we regularly use for takeoff. In any case you can always select a higher climb thrust as Denti's airline appears to be...

Forum: Tech Log

6th Jul 2012, 15:17

Replies: 29

Noise abatement

Views: 13,111

Posted By lederhosen

That is exactly the point Gulfstream, our...

That is exactly the point Gulfstream, our performance tool now has us using toga N1 often way below climb 2, never mind full climb thrust.

Denti I wonder if there is any link between the big...

Forum: Tech Log

6th Jul 2012, 08:41

Replies: 29

Noise abatement

Views: 13,111

Posted By lederhosen

Noise abatement

Anyone else concerned that a procedure where thrust (and noise) is increased at 1500 feet might not comply with the spirit of noise abatement. It is obviously SID dependent, but some late night...

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