planecane
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Joined: Thu Feb 09, 2017 4:58 pm

On a "bumpy" approach, how far above and below glideslope are you?

Mon Aug 12, 2019 7:43 pm

I am very used to bumpy approaches into airports like LAS, especially in the summer. I always wonder, how much is the altitude varying above and below the glideslope? Especially curious when you get the "stomach drop" sensation.

My guess is that it isn't as much as it feels like because items don't move around and I never really notice pressure from the seatbelt.

Obviously the exact altitude variance will change based on the particular conditions but I'm just interested in "typical" or "average." Basically, on your typical summer afternoon approach into LAS what would the answer be?
 
Woodreau
Posts: 1776
Joined: Mon Sep 24, 2001 6:44 am

Re: On a "bumpy" approach, how far above and below glideslope are you?

Mon Aug 12, 2019 8:06 pm

Not more than 1/3 -1/2 dot.

The needles get more sensitive the closer you get to the runway. The further you are away from touchdown the greater the displacement from centerline/glide slope needed move the needles.
Bonus animus sit, ab experientia. Quod salvatum fuerit de malis usu venit judicium.
 
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zeke
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Joined: Thu Dec 14, 2006 1:42 pm

Re: On a "bumpy" approach, how far above and below glideslope are you?

Mon Aug 12, 2019 8:08 pm

Your guess is correct, you can remain on the slope the whole way down and still feel bumpy.
Human rights lawyers are "ambulance chasers of the very worst kind.'" - Sky News
 
LH707330
Posts: 2189
Joined: Fri Jun 15, 2012 11:27 pm

Re: On a "bumpy" approach, how far above and below glideslope are you?

Mon Aug 12, 2019 8:09 pm

Not much at all if it's just a bit of chop. Consider how much your car shakes when you go over a pothole but you still feel it. Most of the time, it's within a few feet.
 
GalaxyFlyer
Posts: 3388
Joined: Fri Jan 01, 2016 4:44 am

Re: On a "bumpy" approach, how far above and below glideslope are you?

Mon Aug 12, 2019 8:33 pm

Let me put it this way, a four-ship formation flies thru turbulence and everybody stays in position. Heck, you can refuel in formation. Glide slope deviations aren’t due to turbulence.


GF

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