737-900 Wow!
05-31-2014, 08:37 AM
#274
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Joined APC: May 2014
Position: Tom’s Whipping boy.
Posts: 1,182
Originally Posted by 82spukram
If you look at the PDF, while in cruise flight, your AOA is simply the the degrees of pitch up. Any other time you can pull up the flight path vector (which would be on the horizon in cruise) and look at its location and count the number of degrees on the attitude indicator between the FPV and your imaginary airplane. Also it's available as an option on the 737NG.
In cruise flights AOA is always 2 degrees for best range. 6 degrees for v ref, and if my memory serves me correctly 3.5 for best endurance.
In cruise flights AOA is always 2 degrees for best range. 6 degrees for v ref, and if my memory serves me correctly 3.5 for best endurance.
05-31-2014, 09:51 AM
#275
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Joined APC: Jun 2009
Position: A320 FO
Posts: 373
Ok. What part? I have used this method on the 190 with a HUD that was very accurate and on the Bus where I could compare what I had verses the FAC (flight augmentation computer). It worked. But maybe that was luck.....if I am wrong or did not explain it well enough I am happy to admit it.
05-31-2014, 10:22 AM
#276
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Joined APC: Mar 2012
Position: 777
Posts: 2,158
I think what he is saying, is that you are confusing terms. You cannot determine AOA in reference to body attitude at cruise, or nose up, or on the attitude on the HSI. The wing AOA is related to body attitude only in that at cruise, Boeing decides what body attitude it wants at designed cruise, speed, then sets the wing in the fuselage to attain that optimum attitude at cruise speeds.
So, AOA can be inferred, but most air carrier planes do not show AOA. I don't fly the 737, so there may be some indication I'm not aware of.
So, AOA can be inferred, but most air carrier planes do not show AOA. I don't fly the 737, so there may be some indication I'm not aware of.
05-31-2014, 10:39 AM
#277
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Joined APC: May 2014
Position: Tom’s Whipping boy.
Posts: 1,182
Originally Posted by Dave Fitzgerald
I think what he is saying, is that you are confusing terms. You cannot determine AOA in reference to body attitude at cruise, or nose up, or on the attitude on the HSI. .
So, AOA can be inferred, but most air carrier planes do not show AOA. I don't fly the 737, so there may be some indication I'm not aware of.
So, AOA can be inferred, but most air carrier planes do not show AOA. I don't fly the 737, so there may be some indication I'm not aware of.
05-31-2014, 10:52 AM
#279
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Joined APC: Mar 2012
Position: 777
Posts: 2,158
Yes, all the plane calculate or have AOA sensors for air data,performance, and flight control computers. They are capable of displaying the info if the customer buys the option, but it seems most airlines do not display it.
After all, if you had an AOA displayed, you might be able to tell what is happening if the computers turn themselves off and spout gibberish, instead of stalling the plane into the ocean from 35k feet.
After all, if you had an AOA displayed, you might be able to tell what is happening if the computers turn themselves off and spout gibberish, instead of stalling the plane into the ocean from 35k feet.
05-31-2014, 10:58 AM
#280
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Joined APC: Nov 2013
Position: Gets weekends off
Posts: 1,168
Originally Posted by Dave Fitzgerald
I think what he is saying, is that you are confusing terms. You cannot determine AOA in reference to body attitude at cruise, or nose up, or on the attitude on the HSI. The wing AOA is related to body attitude only in that at cruise, Boeing decides what body attitude it wants at designed cruise, speed, then sets the wing in the fuselage to attain that optimum attitude at cruise speeds.
So, AOA can be inferred, but most air carrier planes do not show AOA. I don't fly the 737, so there may be some indication I'm not aware of.
So, AOA can be inferred, but most air carrier planes do not show AOA. I don't fly the 737, so there may be some indication I'm not aware of.
All I remember about AOA was make sure the donut was amber and not a red or green chevron and keep it that way until touchdown on the boat.
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