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dwightlooi
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 Posted: Jan 02, 2009 - 08:30 PM
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Elite 1K
Joined: Aug 02, 2006 - 01:14 AM
Posts: 1170
Status: Offline
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That's an F-136, and probably not a flight destined engine.
The F135 has external barrels constructed of isogrid castings for strength and lightness...
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Sponsor
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 Posted: Feb 12, 2012 - 1:56 PM
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F-16.net Sponsor
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JetTest
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Posted: Jan 02, 2009 - 08:38 PM
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Senior member
Joined: Jul 04, 2007 - 01:22 AM
Posts: 368
Status: Offline
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| I think they are actually chem-milled ducts. |
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That_Engine_Guy
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Posted: Jan 02, 2009 - 09:37 PM
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Elite 2K
Joined: Dec 14, 2005 - 05:03 AM
Posts: 2089
Location: Under the engine somewhere.
Status: Offline
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Yes, PW started using "Chem-milled" ducts in the F100 series. The ducts are stronger and lighter than honeycomb, or simple stringer designs. In the F100, they are used for the forward and aft fan ducts, and the augmentor duct.
The "milling" is done by chemical and not mechanical process (Not done on a CMC machine...)
Here is a good explanation from Indiana Micro Etch, Inc; larger parts use the same process on a larger scale:
Quote:
Photo-Chemical Machining, also known as Photo-Fabrication, Photo Etching and Chemical Milling is a process with many technical and financial advantages in the manufacture of flat metal components. In the process, a precise photographic design is transferred onto a resist-coated flat metal surface and exposed to ultraviolet light. Chemical etching selectively dissolves the metal, leaving a precise reproduction of the original design. Since there are no mechanical forces applied to the metal, the final product is burr and stress free.
PW uses "chem-milled" ducts and components in the F119 as well as the F135.
Keep 'em flyin' 
TEG |
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Corsair1963
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Posted: Jan 03, 2009 - 06:16 AM
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Elite 1K
Joined: Dec 19, 2005 - 04:14 AM
Posts: 1830
Status: Offline
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dwightlooi wrote:
That's an F-136, and probably not a flight destined engine.
The F135 has external barrels constructed of isogrid castings for strength and lightness...
Its amazing the thrust available for engine of that size.............  |
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sprstdlyscottsmn
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Posted: Jan 03, 2009 - 05:50 PM
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Elite 1K
Joined: Mar 10, 2006 - 01:24 AM
Posts: 1075
Status: Offline
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| "In thrust we trust" |
_________________
James,
-Pilot
-Aerospace Engineer
-Army Medic (WTF?)
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That_Engine_Guy
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Posted: Jan 03, 2009 - 08:27 PM
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Elite 2K
Joined: Dec 14, 2005 - 05:03 AM
Posts: 2089
Location: Under the engine somewhere.
Status: Offline
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Amen brother!  |
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Corsair1963
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Posted: Jan 04, 2009 - 12:48 AM
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Elite 1K
Joined: Dec 19, 2005 - 04:14 AM
Posts: 1830
Status: Offline
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What no GE Patch..........  |
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singularity
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Posted: Jan 04, 2009 - 03:19 AM
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Enthusiast
Joined: Dec 18, 2008 - 01:06 PM
Posts: 94
Status: Offline
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| Yes engines are quite impressive now a days. When compared to the jumo 004 at wright-patterson, the size and power of todays engines are remarkable! And yes the f135 posted above is beautiful as well...I need to quickly go look at some hot women really quick----> cant make my love of engines overcome that. |
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That_Engine_Guy
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Posted: Jan 04, 2009 - 04:00 AM
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Elite 2K
Joined: Dec 14, 2005 - 05:03 AM
Posts: 2089
Location: Under the engine somewhere.
Status: Offline
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Corsair1963 wrote:
What no GE Patch..........
Does GE market their trademark like PW? 
I have lots of PW patches; among other PW logo stuff. 
For all your PW merchandise needs: http://www.prattwhitneyproducts.com/
Specifically the PW "Thrust you can Trust" hat! 
(I'll be ordering it when I put away my stocking hat)
PW (and the people who work PWs in the field) have used the "Thrust you can Trust" motto for decades. I've seen it on shop walls, vehicles, signs, patches, decals, notebooks, coffee mugs, t-shirts, etc.
Keep 'em flyin'
TEG
PS - I'll add a graphic I made a while back for another thread |
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sprstdlyscottsmn
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Posted: Jan 04, 2009 - 04:23 PM
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Elite 1K
Joined: Mar 10, 2006 - 01:24 AM
Posts: 1075
Status: Offline
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| nice to know I sparked something fun |
_________________
James,
-Pilot
-Aerospace Engineer
-Army Medic (WTF?)
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