Cutbacks
- Thread starter Frenchie
- Start date
Troy McClure
Ah say boy...Whattcha got there son?
Hmmm.....Aint nevuh heard u no runway cutback Son. U need to check your privilege and get back to us.
F9DXER
Well-Known Member
Cutback is used for noise abatement.
The flight is in the 3rd segment of climb where power can be reduced
KSNA is the best example
Here is a quick look at the individual segments that make up the climb procedure (4 total)
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The flight is in the 3rd segment of climb where power can be reduced
KSNA is the best example
Here is a quick look at the individual segments that make up the climb procedure (4 total)
How are take-off segments defined?
From take-off performance calculations I remember that the take-off and initial climb was expressed in a number of segments. Each segment had its own performance requirements. I presume they are
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4EngineETOPS
Well-Known Member
Cutback is used for noise abatement.
The flight is in the 3rd segment of climb where power can be reduced
KSNA is the best example
Here is a quick look at the individual segments that make up the climb procedure (4 total)
How are take-off segments defined?
From take-off performance calculations I remember that the take-off and initial climb was expressed in a number of segments. Each segment had its own performance requirements. I presume they are
Just to add onto this, there are 2 standard noise abatement profiles that most part 121 carriers use: NADP-1 (close-in noise abatement departure procedure) and NADP-2 (distant noise abatement departure procedure). NADP-2 is mostly the standard in the U.S. and requires thrust cutback, acceleration, and the beginning of the flap retraction schedule at 800' AFE. NADP-1 is used more internationally and where noise abatement for close-in communities (SNA, for example) is required. This involves climbing out at a steeper deck angle (maintaining V2 + an additive) prior to acceleration, thrust cutback, and flap retraction. The official FAA publication is here and an AOPA article describing the two NADP procedures is here.
If thrust cutback (i.e. the point at which takeoff thrust is reduced to climb thrust at a specified altitude) isn't what you're referring to, then I can't say I know what a runway cutback is. You referenced something about JFK having a runway cutback, but I'm not sure what that is. The only thing I could think of would be runway grooving, wherein a runway's surface is grooved in order to allow for potentially better performance numbers.