Standing Shock-Wave on Subsonic Commercial Aircraft

picture at http://forums.jetphotos.net/showpost.php?p=456180&postcount=7

thread
http://forums.jetphotos.net/showthread.php?t=42344

Standing Shock-Wave on Subsonic Commercial Aircraft

see supersonic flow images:
http://en.wikipedia.org/wiki/Transonic
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http://upload.wikimedia.org/wikipedia/en/1/1c/FAA-8083-3A_Fig_15-9.PNG
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http://farm3.static.flickr.com/2453/3774303770_189ef808a3_o.jpg
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Category:

Science & Technology

Tags:

• Standing
• Shock-Wave
• Subsonic
• Commercial
• Aircraft

[shadowhunter45s]

how does this happen?

[aardvark2zz]

Similar to a mirage, the air density over the wing is less; but in this case, due to the high speeds, a sudden abrupt barrier (shock-wave) abruptly bends light.

We don't see this as much today since planes fly slower to save fuel. Therefore, the shock-wave is less intense and abrupt.

[aardvark2zz]

Also, see the links in the attached notes in the upper-right.

[aardvark2zz]

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I wish the naysayers would at least prove their point with ANY logic. But, most have one liners that are not even remotely substantiated with any minimal logic.

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[aardvark2zz]

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(see pic link in description) The distortion is in focus as good as an air refraction can be. Look at the very clean vertical edges.

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[doomsmash123]

i'm sorry i'm not sure whats happening all i see is a airplane wing with a white line on it, can someone explain please

[largefallingicicles]

The maximum operational speed for the 747 is mach 0.88 which is not even close to a high enough speed to create transonic shock waves. To put it into perspective, going from .88 to .98 is a 70 mph difference. In a steep decent its probably possible to go from a tailwind in the jetstream to neutral winds or a headwind which could do it for a minute. The aircraft stress load would be dangerous.

[SuperLadiesman5]

what am i supposed to look for????

[aardvark2zz]

Only the very recent ones which are copied from a discussion already talked about somewhere else ! :-)

[megagues]

i like shock waves, they go boom!!

[314159fritz]

Yeah, I use to see that in the older days. Too bad it's rarer today. I also saw smaller ones near the engine cowlings and mounts.

[aardvark2zz]

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For those scratch believers, (see pic link in description) please do explain how come the "scratch" is in focus !! Only large military super cameras with massive signal processing are capable of using a depth of view of around 1500:1 !!!

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