Missed Approaches and Noise Abatement

[Panama Jack]

Help me out here please.

At airports which use VNAP A noise abatement procedures for departure, are you required to follow the VNAP A vertical profile in the event of a missed approach following an instrument approach, or is the noise abatement procedure solely intended for takeoffs?

Thanks.

[stratcat]

No.Noise abatement procedures are departure only.Go around power settings are different that takeoff power settings.I believe that you are suppose to start bringing up flaps at 1000 feet.In a place like YVR your missed approach procedure follows a different track than the Vnap A departure procedure with different altitudes as well.Thats what I think anyway.

[A Regulator]

Again No. Think about where the MAP starts at, lets say you are doing an ILS and minimus are 200' 1/2. You are usually over the runway at 200' and doing lets say an approach speed of 125 kts or so land flaps and gear down. Worse if you are doing an Non precision to lets say 800'/3, and the missed is your best guess (without GPS/FMS) usually somewhere prior to the runway (3miles would be ideal but I know it is not limiting) as you have to be able to line up if I remember around a 3 degree angle or so to allow a stable landing and if you are using the same speeds etc. I will not get into the obstacle stuff and climb angles etc.

Now regarding Noise procedures on take-off, you are on the runway threshold advancing pwr, slowly building speed etc. you get the picture.

[SAR_YQQ]

You are usually over the runway at 200'

Uh - no. On a precision approach like a CAT 1 ILS - you are 200' above the ground at least 1/2 mile back from the 3 degree touch down. If you GA at DH, you never actually get near the runway except in the actual climb out.

Worse if you are doing an Non precision to lets say 800'/3, and the missed is your best guess (without GPS/FMS) usually somewhere prior to the runway (3miles would be ideal but I know it is not limiting) as you have to be able to line up if I remember around a 3 degree angle or so to allow a stable landing and if you are using the same speeds etc.

You are discussing VDP (visual descent point) and a non-precision MAP. They are not mutually exclusive of each other. In most IFR non-precision approaches, the Missed Approach Point (MAP) is well inside the VDP and in most cases is half way down the runway. There is no guessing when it comes to where you GA on any IFR approach. It is based on timing, DME, NDB/VOR needle or DA/DH.

I spend my days watching outside while my students fly all different kinds of approaches in all types of weather.

[A Regulator]

I am glad to see you talking with your students on this, because most do not know or thought about MAP points. I was not going to get into all the details etc. and flight profiles etc, I was only trying to point out that the MAP point usually starts in the air and behind you and that they are two different procedures. I have seen lots of interesting dives close to the runway on PPCs because they did not understand stable approach concepts. The most interesting one was on a NDB where we broke out 90 degrees from the runway and the PIC told he was landing. Lucky we were in a sim and the sim operator froze the sim and had an interesting chat with him telling.