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Nose-up attitude during approach/landing (Read 1426 times)
Jan 10th, 2010 at 11:05pm

Mr._Ryan   Offline
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I'm just wondering if what I'm encountering is common or not. I'm finding that when I'm in the pattern or landing in jets in particular, that the attitude is so nose-up that I can't see our of the front of the airplane very well. I always fly in the virtual cockpit, and I love that view - to me it's the most realistic. But I have to hit shift+enter like 10-15 times, literally, to move the viewpoint up so that it's high enough to see what's in front of you. The problem is, I'm finding that when I move the viewpoint up that much, it distorts your perception out of the window in terms of how much/how fast you're descending, among other things.

I seem to find that at approach speed, to maintain proper speed I'm generally in a 10 to 12.5 degree nose-up attitude. Is that too much? If so, what steps can I take to correct the attitude while still maintaining the proper speed?

The picture below is of me at approach speed (ca. 135 knots) and flying "straight and level." Yet look how far up the nose is pitched. This doesn't seem normal to me.

Thanks!

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Reply #1 - Jan 10th, 2010 at 11:17pm

snippyfsxer   Offline
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No No.  13 degrees up only if you are flying the Concorde! Smiley  As you are flying at a fixed altitude, following your flap schedule, your nose will get pretty high, but that is too much.  Go to the next level of flaps or speed up.  Your Angle of Attack should be around 3 or 4 degrees as you descend  If you are approaching at ~130, you should be descending at about 650 fpm.  You shouldn't be flying straight and level at 130 knots, you should be descending.  If your flaps are set correctly, and you are descending at the proper rate, the AOA will obviously take care of itself
 
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Reply #2 - Jan 10th, 2010 at 11:20pm

Mr._Ryan   Offline
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snippyfsxer wrote on Jan 10th, 2010 at 11:17pm:
No No.  13 degrees up only if you are flying the Concorde! Smiley  Your Angle of Attack should be around 3 or 4 degrees.  If you are approaching at ~130, you should be descending at about 650 fpm.  You shouldn't be flying straight and level at 130 knots, you should be descending.  If your flaps are set correctly, and you are descending at the proper rate, the AOA will obviously take care of itself


Thank you very much. I knew something wasn't right and I figured it was a simple solution. Of course, you're probably wondering why I'm flying jets if I didn't know this, but that's another post entirely.  Wink

Thanks!
 
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Reply #3 - Jan 10th, 2010 at 11:27pm

snippyfsxer   Offline
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That is why I don't bother with default planes.  Good Payware planes actually come with diagrams-for-dummies that tell you about how fast you should be flying and what your flaps should be at any given point in a "typical" approach.

A real pilot can correct me, but ideally, I don't decelerate to approach speed until right before I intercept the glideslope.  When I am 1 or 2 dots below, I deploy the gear and approach flaps, which should slow you down to where you need to be, at which point, if you have timed it right, you won't have to fly in that nose-high attitude for very long before you can ease off and let the plane descend at a good AOA.  Nevertheless, I used to have the problem of seeing over the glare shield all the time until I started using the VC with a Track IR

Keep in mind that your nose might get near 10 degrees on a straight and level part of the approach, depending on the plane, if you are flying at the bare minimum manuevering speed for that level of flaps.  I normally add a bit of buffer, specifically to combat the problem you cite.  "Flap schedules" make for wonderful conversation among us flight-sim nerds!
 
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Reply #4 - Jan 11th, 2010 at 12:20am

-Crossfire-   Offline
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snippyfsxer wrote on Jan 10th, 2010 at 11:27pm:
That is why I don't bother with default planes.  Good Payware planes actually come with diagrams-for-dummies that tell you about how fast you should be flying and what your flaps should be at any given point in a "typical" approach.


You don't need to buy a plane to learn how to fly a proper approach... Learning Center  Wink
 

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Reply #5 - Jan 11th, 2010 at 6:09am

C   Offline
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Mr._Ryan wrote on Jan 10th, 2010 at 11:05pm:
The picture below is of me at approach speed (ca. 135 knots) and flying "straight and level." Yet look how far up the nose is pitched. This doesn't seem normal to me.


I'll agree there's a distinct lack of flap in that picture - an if you were doing an approach with no flap, you fly it considerably faster than a normal approach. Smiley

Certainly anywhere below 200kt you want to be thinking about flap, and on the approach ATC will normally be expecting you to keep the speed up in the 150-180kt ballpark, bringing it back to threshold speed in the final few miles of the approach.
 
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Reply #6 - Jan 11th, 2010 at 9:09am

Mr._Ryan   Offline
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Well I always do check the max flap speeds in the kneeboard, but one thing I do find is that particularly when you get to the higher flap settings (30, 40), as soon as I add in the last bit of flaps I'll get a warning "whoop, whoop" even though I am distinctly below the max flap speeds. Am I misinterpreting that warning? I've always thought it was telling me I had lowered the flaps at too high a speed, even though the reference info says I haven't.
 
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Reply #7 - Jan 11th, 2010 at 9:19am

C   Offline
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Mr._Ryan wrote on Jan 11th, 2010 at 9:09am:
as soon as I add in the last bit of flaps I'll get a warning "whoop, whoop" even though I am distinctly below the max flap speeds. Am I misinterpreting that warning? I've always thought it was telling me I had lowered the flaps at too high a speed, even though the reference info says I haven't.


In my experience warnings like that are likely to be the opposite, such as being too slow, low, or for example not having the gear down (at a certain flap setting an below a certain speed - for example the VC10 has a warning horn if speed it less that 150kts, flaps are at "approach" or "land", and the gear is up).
 
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Reply #8 - Jan 11th, 2010 at 9:32am

Mr._Ryan   Offline
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C wrote on Jan 11th, 2010 at 9:19am:
Mr._Ryan wrote on Jan 11th, 2010 at 9:09am:
as soon as I add in the last bit of flaps I'll get a warning "whoop, whoop" even though I am distinctly below the max flap speeds. Am I misinterpreting that warning? I've always thought it was telling me I had lowered the flaps at too high a speed, even though the reference info says I haven't.


In my experience warnings like that are likely to be the opposite, such as being too slow, low, or for example not having the gear down (at a certain flap setting an below a certain speed - for example the VC10 has a warning horn if speed it less that 150kts, flaps are at "approach" or "land", and the gear is up).


Ah, I'll have to check that, that may be exactly what it is.
 
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Reply #9 - Jan 11th, 2010 at 9:42am

snippyfsxer   Offline
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Yes, that is true about the landing configuration warning horn....

This probably won't be helpful (perhaps someone will think I'm pitching payware aircraft or something... Wink), but in a real 737 (800?) the Primary Flight Display would automatically display the ranges for the minimum and maximum maneuvering and flap speeds right there on the speed tape for a given aircraft configuration.  The pilot wouldn't have to guess about what flaps he should be at for any speed.
 
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Reply #10 - Jan 11th, 2010 at 10:07am

Brett_Henderson   Offline
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Also.. make sure you're at a safe landing weight..  Many people takeoff in a fully fueled jet.. fly a few hundred NM, and are landing WAY too heavy.

This would also account for having to be at such a high pitch at approach speed..
 
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Reply #11 - Jan 11th, 2010 at 10:18am

C   Offline
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Brett_Henderson wrote on Jan 11th, 2010 at 10:07am:
Also.. make sure you're at a safe landing weight..  Many people takeoff in a fully fueled jet.. fly a few hundred NM, and are landing WAY too heavy.


Following on from Brett's well made point, also make sure that you're flying the right speed for the weight. On the approach that isn't as critical (as long as you don't go below threshold speed), but your threshold speed could probably vary by anything between 10 and 20kts, depending on the weight (again, I'm no expert on the 737 figures, so this is a rough guess).

Keep asking though. I was fairly unaware of such thing until I flew large aeroplanes for real. Smiley

 
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Reply #12 - Jan 11th, 2010 at 10:25am

snippyfsxer   Offline
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C wrote on Jan 11th, 2010 at 10:18am:
Brett_Henderson wrote on Jan 11th, 2010 at 10:07am:
Also.. make sure you're at a safe landing weight..  Many people takeoff in a fully fueled jet.. fly a few hundred NM, and are landing WAY too heavy.


Following on from Brett's well made point, also make sure that you're flying the right speed for the weight. On the approach that isn't as critical (as long as you don't go below threshold speed), but your threshold speed could probably vary by anything between 10 and 20kts, depending on the weight (again, I'm no expert on the 737 figures, so this is a rough guess).

Keep asking though. I was fairly unaware of such thing until I flew large aeroplanes for real. Smiley



Unless he is flying a plane with a working FMC or he has good tables, he probably doesn't know what his speeds should be...
 
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Reply #13 - Jan 11th, 2010 at 10:37am

C   Offline
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snippyfsxer wrote on Jan 11th, 2010 at 10:25am:
C wrote on Jan 11th, 2010 at 10:18am:
Brett_Henderson wrote on Jan 11th, 2010 at 10:07am:
Also.. make sure you're at a safe landing weight..  Many people takeoff in a fully fueled jet.. fly a few hundred NM, and are landing WAY too heavy.


Following on from Brett's well made point, also make sure that you're flying the right speed for the weight. On the approach that isn't as critical (as long as you don't go below threshold speed), but your threshold speed could probably vary by anything between 10 and 20kts, depending on the weight (again, I'm no expert on the 737 figures, so this is a rough guess).

Keep asking though. I was fairly unaware of such thing until I flew large aeroplanes for real. Smiley



Unless he is flying a plane with a working FMC or he has good tables, he probably doesn't know what his speeds should be...


I bet somewhere in the ether of the internet, if he really wanted to, he could find out. Wink Smiley
 
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Reply #14 - Jan 11th, 2010 at 11:01am

Mr._Ryan   Offline
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There we are, more flaps, more throttle and presto:

...

The warning whoop was from the gear not being down, not from going too fast for a certain configuration. The speed in the picture above is about 140 knots, which was on base, so perhaps a bit fast, but not much if any.

But the angle of attack was much better, no need to adjust the view to see out in front of me.

Thanks for everyone's input, and I do agree the "stock" reference information could be a little better, and it wouldn't seem to be something that would be that difficult to put together. I'll do some digging on what's missing.
 
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