lacke
Posts: 16
Joined: Mon May 07, 2001 2:47 am

What Is Happening On This Picture?

Tue Mar 11, 2003 3:10 pm

Please someone tell me what is going on here

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Photo © Keith Blincow



thanks

 
kevi747
Posts: 991
Joined: Sat Apr 14, 2001 5:59 pm

RE: What Is Happening On This Picture?

Tue Mar 11, 2003 3:13 pm

That engine is spitting out water. Just kidding. I've seen that from inside the cabin before. I don't know what that is. I always thought it was the engime sucking water off the runway/taxiway.
"Reality has a well-known liberal bias." --Stephen Colbert
 
res
Posts: 383
Joined: Mon Jul 24, 2000 8:53 am

RE: What Is Happening On This Picture?

Tue Mar 11, 2003 3:17 pm

Its most likely converging air - the air being sucked into the fan, then the air being blasted toward the engine inlet.
FLY NAVY
 
AWspicious
Posts: 2780
Joined: Fri Sep 14, 2001 7:47 am

RE: What Is Happening On This Picture?

Tue Mar 11, 2003 3:20 pm

Nothing serious - Just an airplane relieving it's self after a night of heavy beer drinking.... At Hooters  Laugh out loud

aw
Nevermind political correctness - Envision using your turn signals!
 
User avatar
CCA
Posts: 770
Joined: Wed Oct 02, 2002 7:29 pm

RE: What Is Happening On This Picture?

Tue Mar 11, 2003 3:49 pm

Usually at low speed with high thrust and the right atmospheric conditions low pressure vortices form due to condensation, this one looks more like it's passed over a puddle of water which helps the process but gives a similar, but much more spectacular effect.
This is another way for the same sort of thing.

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Photo © David Morrell


I managed to find another one as you can see no forward speed which would require less thrust for the same effect.

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Photo © Keith Blincow

P1 in A330, A340, A346, B742, B744, B748.
 
AApilot2b
Posts: 451
Joined: Wed Nov 01, 2000 12:38 pm

RE: What Is Happening On This Picture?

Tue Mar 11, 2003 6:08 pm

The answer by CCA says it all. I have seen this a lot with F-16s. They create a mini tornado in front of the aircraft (even at idle) it is most noticeable if their is moisture in the air. It is pretty cool to watch.
 
VonRichtofen
Posts: 4262
Joined: Sun Nov 05, 2000 3:10 am

RE: What Is Happening On This Picture?

Tue Mar 11, 2003 6:17 pm

Indeed it is a vorticy created by the engine ingestion and a wet taxi area. As said by CCA this one was probably from a large puddle.

When I worked on the ramp at YYC I saw this all the time when final marshalling a departing aircraft on a wet ramp.

Regards,
Kris
YYC
 
A330DAT
Posts: 461
Joined: Thu Nov 15, 2001 2:21 am

RE: What Is Happening On This Picture?

Tue Mar 11, 2003 11:16 pm


Just like AApilot2b said. It's a mini tornado being formed with air being sucked into the engine.

Below here are pictures of 737's equipped with "pins" in front of their engines, which are there to avoid injestion (sucking up) of debris. Not all aircraft are equipped with this, of course. In this case they are used in rugged terrain of the high north where the risk of engine damage is greater. Also notice what looks like a ski on the forward landing gear. This also prevents debris (rocks, pebbles...) from damaging the aircraft.



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Photo © Rob Rindt
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Photo © Den Pascoe



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Photo © Den Pascoe
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Photo © Kevin Wachter



 Smokin cool
 
backfire
Posts: 3467
Joined: Fri Oct 06, 2006 8:01 am

RE: What Is Happening On This Picture?

Tue Mar 11, 2003 11:22 pm

Is the C-17 in the photo engaging reverse thrust?

There's often a flexibility demo at air shows in which the aircraft backs up on the taxiway. If this is the case, does that explain the airflow which has created the vortex?
 
aamd11
Posts: 863
Joined: Sat Nov 17, 2001 11:54 am

RE: What Is Happening On This Picture?

Wed Mar 12, 2003 12:41 am

Here's a few photos i found with similar 'vortexs'


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Photo © Pedro
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Photo © Pedro



Showing an RB211-524 at 80% N1 (left) and 100% N1 (right).
Pretty cool view  Smokin cool

A^A MD-11