Noise abatement has gotten easier but you still need to pay attention to local rules to stay out of trouble. Here's a quick primer:
You can also find noise abatement procedures for several airports at: https://whispertrack.com.
For the Gulfstream specific considerations, see: Gulfstream Noise Abatement Procedures.
Everything here is from the references shown below, with a few comments in an alternate color.
Photo: Aircraft noise sign, from David Hawgood (Creative Commons).
Chapters 2 through 4 list evolving ICAO noise standards over time. These chapters are where we get "stages" of noise compliance. An aircraft that complies with chapter 2, for example, is "Stage 2 compliant." The G450 complies with chapter 4, hence our Stage 4 designation. There really isn't a "Stage 1" compliance, we simply refer to really noisy airplanes as Stage 1.
[14 CFR 36 Appendix B §Section B36.5, Maximum Noise Levels
The U.S. FAA "Stage" noise standards are similar to the ICAO "Chapter" noise standards:
Here is an example manufacturer noise data sheet, what the inspector walking down the ramp is going to ask you to present:
As you can see, a Gulfstream G450 meets ICAO Chapter 4 and FAA Stage 4 standards.
[ICAO Doc 8168, Vol I §7, ¶3.2.3.b.] The noise abatement procedure specified by an operator for any one aeroplane type should be the same for all aerodromes.
Life has gotten easier because of this new ICAO stipulation, we can no longer have noise abatement procedures tailored to individual airports. Gulfstream has decided the normal procedures used in day-to-day operations are the procedures you will use to meet noise abatement requirements. Unless you are operating under JAA/EASA, you don't need to know any other noise abatement procedure. Or do you? First we'll cover the Noise Information Manual procedures and then move on to JAA/EASA.
Figure: NBAA Noise Abatement Departure Procedure, from NBAA Website.
In 2015 the NBAA revised their recommended noise abatement procedures to more closely reflect ICAO norms . . .
Back in the old days, Gulfstream had a Noise Information Manual (NIM) that had specific procedures for many U.S. and world airports that were a bit of a handful to manage and memorize. They got called on this by several worldwide agencies and were told to have only one or two procedures. So they gave us U.S. operators the idea that you use normal procedures at specified flap and thrust settings and you will be okay. But they do offer their JAA/EASA operators a better way.
Gulfstream issues a JAA Operating Manual Supplement, GAC-OMS-02, Noise Abatement Departure Procedures for JAA/EASA Operators, that offers two other noise abatement departure procedures. To that end, the JAA supplement offers two noise abatement procedures.
[GAC-OMS-02, pg. 4]
This procedure is easier than the description makes it seem. Simply use normal takeoff procedures, leave the flaps set, select manual speeds before 800' and auto speeds at 3,000' for a normal clean up. So what happens when you do this?
Note: the display controller will indicate VREF for 20° flaps when the flap handle is set to 20° reassuring you that you can retract the flaps safely. The second the flap handle goes to 0° the VREF increases for a clean configuration and you will appear to be below VREF. Of course you are not.
See the video: ELLX Takeoff Runway 06 for demo of these procedures at Luxembourg.
[GAC-OMS-02, pg. 5.]
14 CFR 36, Title 14: Noise Standards: Aircraft Type and Airworthiness Certification, Federal Aviation Administration, Department of Transportation
Gulfstream JAA Operating Manual Supplement for GIV, GIV-SP, G400, G300, G450, GV, G500, and G550 Airplanes, Supplement Number GAC-OMS-02: Noise Abatement Departure Procedures for JAA/EASA Operators, Basic Issue, June 25, 2008
Gulfstream Noise Information Manual, Revision 12, Sept 1, 2011
ICAO Annex 16 - Environmental Protection - Vol I - Aircraft Noise, International Standards and Recommended Practices, Annex 16 to the Convention on International Civil Aviation, Vol I, July 2008
ICAO Doc 8168 - Aircraft Operations - Vol I - Flight Procedures, Procedures for Air Navigation Services, International Civil Aviation Organization, 2006
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