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flateric
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 Posted: Mar 13, 2009 - 02:51 AM
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Enthusiast
Joined: Aug 22, 2006 - 10:56 PM
Posts: 83
Location: Moscow/Russia
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A question to who may know - why this EAFB Raptor's nozzle exhaust have so strange light-colored pattern on the top flap? Not one you usually see - at least in my case. Or it's just effects of light?
Thanks anyway! |
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Sponsor
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 Posted: May 26, 2013 - 1:40 AM
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F-16.net Sponsor
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Guysmiley
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Posted: Mar 13, 2009 - 03:59 AM
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Elite 1K
Joined: May 26, 2005 - 08:39 PM
Posts: 1496
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| They all have that subtle scalloped shaping, the light at that angle accentuates the effect. |
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sferrin
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Posted: Mar 13, 2009 - 04:46 AM
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Elite 1K
Joined: Jul 22, 2005 - 04:23 AM
Posts: 1613
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flateric wrote:
A question to who may know - why this EAFB Raptor's nozzle exhaust have so strange light-colored pattern on the top flap? Not one you usually see - at least in my case. Or it's just effects of light?
Thanks anyway!
Hey there! You will like this site I think.  |
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"There I was. . ."
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flateric
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Posted: Mar 13, 2009 - 09:32 AM
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Enthusiast
Joined: Aug 22, 2006 - 10:56 PM
Posts: 83
Location: Moscow/Russia
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Neno
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Posted: Apr 18, 2009 - 09:44 AM
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Active Member
Joined: Sep 29, 2006 - 11:35 AM
Posts: 220
Location: Italy
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| That picture is anhoter confirmation that nozzles can (obviously) move asimmetrically. Probably a simple software upgrade in FCS could allow the raptor to have a better roll rate. |
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johnwill
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Posted: Apr 18, 2009 - 04:11 PM
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Elite 1K
Joined: Mar 24, 2007 - 09:06 PM
Posts: 1364
Location: Fort Worth, Texas
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| I can assure you that if the F-22 needed more roll rate and if differential TV would help, it would have been done many years ago. "Simple software upgrade in FCS" is an oxymoron. |
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Kryptid
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Posted: Apr 18, 2009 - 06:45 PM
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Senior member
Joined: Aug 10, 2008 - 02:16 AM
Posts: 343
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| I actually have a book that claimed that the YF-22's nozzles could pitch differentially. Was the author wrong or was the feature simply removed for the production F-22A? |
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Neno
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Posted: Apr 18, 2009 - 10:39 PM
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Active Member
Joined: Sep 29, 2006 - 11:35 AM
Posts: 220
Location: Italy
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johnwill wrote:
"Simple software upgrade in FCS" is an oxymoron.
 Ok, ok, i have to admit that.. |
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jimdvin
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Posted: May 17, 2009 - 11:51 PM
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Newbie
Joined: May 17, 2009 - 11:44 PM
Posts: 1
Status: Offline
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| If you are answering questions like this one here, then you must realize that they are being asked by foreign intelligence. If you work in the F-22 community, check with your buds before you give stuff away. |
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popcorn
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Posted: May 18, 2009 - 01:39 AM
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Elite 2K
Joined: Sep 24, 2008 - 09:55 AM
Posts: 2046
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Kryptid wrote:
I actually have a book that claimed that the YF-22's nozzles could pitch differentially. Was the author wrong or was the feature simply removed for the production F-22A?
They are slaved to each other.. maybe one nozzle is open for maintenance.. |
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That_Engine_Guy
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Posted: May 18, 2009 - 03:25 AM
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Elite 2K
Joined: Dec 14, 2005 - 05:03 AM
Posts: 2198
Location: Under the engine somewhere.
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popcorn wrote:
Kryptid wrote:
I actually have a book that claimed that the YF-22's nozzles could pitch differentially. Was the author wrong or was the feature simply removed for the production F-22A?
They are slaved to each other.. maybe one nozzle is open for maintenance..
As far as I've read "unclass" information at J@nE'$ or other "reliable" aviation sites, the F119s vector together in the Raptor.
I think Popcorn gets the prize on this mystery. 
I believe when the engines are shut off, the nozzle opens. Either for inspection access or simply as the hydraulics relax? Perhaps both by design.
It seems every photo I see of Raptors parked on the line, or F119s on display, the nozzles are open like #1 in that photo in question. The photo may have been taken during an engine run when only #2 was in operation?
My  - simple observation... 
About appearance; even other engines with C/D nozzles, the nozzles look very different 'new' than old, the coloring of the coatings is very pronounced when the parts have little time on them. They can be quite beautiful. (At least to an engine guy...) Shades of gray and white. Sunlight often enhances the contrast and highlights any angles or contours in the parts.
Keep 'em flyin' 
TEG |
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| Notice the hoist says J75 on it? Seems the more things change, the more they stay the same! |
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[Airplanes are] near perfect, all they lack is the ability to forgive.
— Richard Collins
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johnwill
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Posted: May 18, 2009 - 04:35 AM
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Elite 1K
Joined: Mar 24, 2007 - 09:06 PM
Posts: 1364
Location: Fort Worth, Texas
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It almost looks like the nozzles could be used as speedbrakes.
raptors_parked.jpg is a beautiful photo! |
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That_Engine_Guy
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Posted: May 18, 2009 - 04:57 AM
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Elite 2K
Joined: Dec 14, 2005 - 05:03 AM
Posts: 2198
Location: Under the engine somewhere.
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The cropped photo from the one above. I do remember seeing the large night-time flightline photo on the USAF site if I remember correclty? 
http://www.langley.af.mil/shared/media/ ... 9K-026.jpg
Quote:
LANGLEY AIR FORCE BASE, Va. -- An F-22A Raptor sits on the flightline during a Phase 1 exercise here Jan. 31. The operational readiness evaluation evaluates the 1st Fighter Wing's ability to prepare and deploy personnel, equipment and support assets to a combat environment. (U.S. Air Force photo by Senior Airman Austin Knox)
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[Airplanes are] near perfect, all they lack is the ability to forgive.
— Richard Collins
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r2d2
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Posted: May 18, 2009 - 05:05 AM
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Active Member
Joined: Nov 18, 2008 - 04:52 AM
Posts: 193
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That_Engine_Guy wrote:
...........
It seems every photo I see of Raptors parked on the line, or F119s on display, the nozzles are open like #1 in that photo in question. The photo may have been taken during an engine run when only #2 was in operation?
............
An excellent justification as usual.
What do you think of the rudders' positions? Right engine being ''on'' and left being ''off'' the computer commands the rudders to correct yaw??? |
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That_Engine_Guy
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Posted: May 18, 2009 - 11:51 AM
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Elite 2K
Joined: Dec 14, 2005 - 05:03 AM
Posts: 2198
Location: Under the engine somewhere.
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Could be...
I'd suspect the person holding the brakes is simply pressing on the pedals a bit off center.
TEG |
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[Airplanes are] near perfect, all they lack is the ability to forgive.
— Richard Collins
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