Forum: F-35 Lightning II

F-22 and F-35 rcs in layman's terms



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spazsinbad
PostPosted: Feb 07, 2010 - 11:14 PM Reply with quote Back to top
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Not to mention the DAGs... Smile http://en.wikipedia.org/wiki/Dags_(subculture) See 'History' for my meaning - first sentence.

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Tinito_16
PostPosted: Feb 08, 2010 - 12:14 AM Reply with quote Back to top
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As long as you install catalytic converters on the sheep DAGs shouldn't be a problem (http://www.cnsnews.com/news/article/46560). It has to be validated in a wind tunnel however, because I'm not sure the sheep can hang on in supersonic maneuvering exceeding 7G's (If the sheep blacks out and lets go, we lose our RAM, so we can't let THAT happen).

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spazsinbad
PostPosted: Feb 08, 2010 - 12:20 AM Reply with quote Back to top
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Good Catch Tinito - that methane is lethal - but a good six oclock killer for any air breathers behind. Smile

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PostPosted: Feb 08, 2010 - 02:01 AM Reply with quote Back to top
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Tinito_16 wrote:
As long as you install catalytic converters on the sheep DAGs shouldn't be a problem (http://www.cnsnews.com/news/article/46560). It has to be validated in a wind tunnel however, because I'm not sure the sheep can hang on in supersonic maneuvering exceeding 7G's (If the sheep blacks out and lets go, we lose our RAM, so we can't let THAT happen).


Will this be the last sheeped fighter?

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spazsinbad
PostPosted: Feb 08, 2010 - 04:19 AM Reply with quote Back to top
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BAAAHHH

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Roscoe
PostPosted: Feb 08, 2010 - 04:20 AM Reply with quote Back to top
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Yup, all future fighters will be un-sheeped at Gates' direction.

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PostPosted: Feb 08, 2010 - 05:36 AM Reply with quote Back to top
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underhill wrote:
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LMAO LMAO LMAO LMAO LMAO LMAO LMAO LMAO Doh


Now see there Undy, you can be funny when ya try. I got a good laugh from that one. Laughing Well gotta go now. Must go scan the horizon for those NSA guys that are sure to be lurking out there somewhere. Rolling Eyes

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imispgh
PostPosted: Feb 08, 2010 - 08:16 PM Reply with quote Back to top
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That_Engine_Guy wrote:
checksixx wrote:
The F-117 was never "shopped around" the Pentagon. Your question is in the 'classified realm'.


It was according to Ben Rich (Ref: "Skunk Works"); the ball-bearing was a 'visual' for them to illustrate just how 'small' their new project looked on radar to the officials they were trying to get funding from. After a while they were told to quit using the example for the obvious reasons.

The original intent (as I read it) of the topic wasn't "numbers" of actual RCS of any aircraft, but an visual analogy of sorts like the F-117/Ball-Bearing story. IE - "Layman's Terms"

The USAF/Lockheed have also stated in public that the F-22 has 'better stealth' and/or lower RCS than the F-117 did. After all it's what 3rd Gen stealth stuff? If the USAF scolded LM about the bearing, they're not going to give any 'examples' about the Raptor or the Lightening II.

In one of the USAF's fancy TV commercials it was said the Raptor appeared "smaller than a bird" on radar. (and showed someone squinting at a radar screen) This would be a great example. Try tracking a bird on radar; which are typically to small to even track unless they're in a flock. Or you could use the ball-bearing as an example. At long ranges you can see where it would be impossible to even find. The "needle in a hay-stack" comes into play here, especially if there is any jamming occurring in the area in question.

I've also heard the analogy of the B-52 appearing 'as large as a house' on radar, and the F-16 being the size of a 'family sedan'

The F-117's biggest weakness IMO was it's top speed. Much like the U-2 in previous generations having 'stealth' and height for defense, but no speed. the replacement for both took LO to new levels and upped the speed to match. The combination of LO/Speed should make for one hard target.

I do agree though about posting numbers to this question; so I don't want to see a lot of zeros followed by meters squared or the sort.

Keep 'em flyin' Thumb (even if you can't see 'em)
TEG


Has anyone seen the actual crossection of a 117 or F-22? Not a print out - the actual radar image from the actual display? And if you did were you able to asses that cross section over time and as the aircraft aged and that coating cracked?

There is False Claims Lawsuit on record, against Lockheed, by one of it's own coatings engineers that says there are huge problems with the F-22 in this area.
http://www.flightglobal.com/blogs/the-d ... -lock.html
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SpudmanWP
PostPosted: Feb 08, 2010 - 08:47 PM Reply with quote Back to top
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Nobody who has seen it can talk about it without a chance of going to jail.

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vegasdave901
PostPosted: Feb 09, 2010 - 02:24 AM Reply with quote Back to top
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TEG, thanks for the Ben Rich quote on 'shopping it around the Pentagon' and for a very good answer to my question. I hadn't thought about the speed aspect. If it's as or almost as stealthy as the F-117 but moving mach+ then it's that much 'stealthier'.

dragorv, thanks for the direct answer to my questions. Marble and golfball in 'laymans terms'.

sextus, the reason I want to know is that I'm jet crazy like some people are NFL, or NBA crazy. Some people just have the itch to know Brett Favre's shoe size. And I'm not dumb or crazy for asking, if the answer was classified then it doesn't get answered and my question was not for a spec. # but for layman's terms. (thanks again to dragorv pointing to the other thread). Alot of 'close to secret' questions on this forum seem to always get the "why do you need to know!?!?!?' treatment as if to imply that the questioner is a spy. Well, I don't 'need' to know, but if a question does not reveal something that is actually secret (which this obviously is not) then I deserve to know. Why? Because I paid for the jets.
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Beazz
PostPosted: Feb 09, 2010 - 02:42 AM Reply with quote Back to top
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imispgh wrote:
That_Engine_Guy wrote:
checksixx wrote:
The F-117 was never "shopped around" the Pentagon. Your question is in the 'classified realm'.


It was according to Ben Rich (Ref: "Skunk Works"); the ball-bearing was a 'visual' for them to illustrate just how 'small' their new project looked on radar to the officials they were trying to get funding from. After a while they were told to quit using the example for the obvious reasons.

The original intent (as I read it) of the topic wasn't "numbers" of actual RCS of any aircraft, but an visual analogy of sorts like the F-117/Ball-Bearing story. IE - "Layman's Terms"

The USAF/Lockheed have also stated in public that the F-22 has 'better stealth' and/or lower RCS than the F-117 did. After all it's what 3rd Gen stealth stuff? If the USAF scolded LM about the bearing, they're not going to give any 'examples' about the Raptor or the Lightening II.

In one of the USAF's fancy TV commercials it was said the Raptor appeared "smaller than a bird" on radar. (and showed someone squinting at a radar screen) This would be a great example. Try tracking a bird on radar; which are typically to small to even track unless they're in a flock. Or you could use the ball-bearing as an example. At long ranges you can see where it would be impossible to even find. The "needle in a hay-stack" comes into play here, especially if there is any jamming occurring in the area in question.

I've also heard the analogy of the B-52 appearing 'as large as a house' on radar, and the F-16 being the size of a 'family sedan'

The F-117's biggest weakness IMO was it's top speed. Much like the U-2 in previous generations having 'stealth' and height for defense, but no speed. the replacement for both took LO to new levels and upped the speed to match. The combination of LO/Speed should make for one hard target.

I do agree though about posting numbers to this question; so I don't want to see a lot of zeros followed by meters squared or the sort.

Keep 'em flyin' Thumb (even if you can't see 'em)
TEG


Has anyone seen the actual crossection of a 117 or F-22? Not a print out - the actual radar image from the actual display? And if you did were you able to asses that cross section over time and as the aircraft aged and that coating cracked?

There is False Claims Lawsuit on record, against Lockheed, by one of it's own coatings engineers that says there are huge problems with the F-22 in this area.

Well back in my days as an air traffic controller I saw the F117 several times. I kept the MTI gain set as it was for picking up any other moving target and turned the secondary radar ( computer generated info from the aircraft transponder ) completely down and the F117 raw radar target was as large as any airliner on my scope. But as was explained to me on another forum, while operating in the CONUS the F117s were not trying to be invisible and have/had a tube or something they lowered from the bottom of it which would make it show up on any radar scope like any other plane.
But judging by the first Gulf war, it is quiet obvious that when they wanted not to be seen, they knew how to make that happen Wink

Beazz

http://www.flightglobal.com/blogs/the-d ... -lock.html
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r2d2
PostPosted: Feb 09, 2010 - 03:45 AM Reply with quote Back to top
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vegasdave901 wrote:
.... I hadn't thought about the speed aspect. If it's as or almost as stealthy as the F-117 but moving mach+ then it's that much 'stealthier'....


Well, I know nothing about this 'stealth' thing so here is a question; isn't any Mach X insignificant when compared to signal speed? I admit that high speed may impose some problems while the target is being tracked on a -perhaps analog- radar monitor but that should not change the RCS signature?
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vegasdave901
PostPosted: Feb 09, 2010 - 04:03 AM Reply with quote Back to top
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The speed doesn't have anything to do with the actual stealth of the a/c or speed or strength of the radar signal. It's more like if an enemy radar catches a tiny return or ghost image of something that may or may not be there, by the time the operator starts wondering what it is he may get 1 or 2 more radar passes and then the F-22 or F-35 is long gone. If a slow moving platform gave him any kind of return he might have time to figure out what it is, call other radar or missile sites and give them a heads-up.
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elp
PostPosted: Apr 10, 2010 - 07:56 AM Reply with quote Back to top
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vegasdave901 wrote:
I saw someon post the actual number for the rcs of the F-35 so my question should probably not be in the classified realm.
When the F-117 was being shopped around the Pentagon by Lockheed, they would give the General's a 1/8th in. steel ball bearing and say, "Here's the F-117's cross-section."
So how big would the ball bearings be for the F-22 and F-35?


From LM

http://www.youtube.com/watch?v=1IhDyctKSYI


and this from LM after the F-117 shoot down.

Quote:
Even a standard turning maneuver could increase the aircraft’s radar cross section by a factor of 100 or more.


http://www.airpower.au.af.mil/airchroni ... mbeth.html

This is an old book has some words in it that certainly qualifies for a violation of OPSEC in any language on the topic of L.O.

http://www.amazon.com/F-117-Stealth-act ... 0897472594

This is a must read for understanding the basics of L.O.

Doug Richardson, Stealth, Deception, Evasion and concealment in the air, 1989, First Edition, ISBN 0-517-57343-1

Along with this...

The Radar Game (by Dr. Grant)

http://www.wepapers.com/Papers/32684/The_Radar_Game

Finally, there is the question of what technology is allowed to be exported.

http://www.military.com/features/0,15240,156400,00.html

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shep1978
PostPosted: Apr 10, 2010 - 12:05 PM Reply with quote Back to top
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imispgh wrote:

There is False Claims Lawsuit on record, against Lockheed, by one of it's own coatings engineers that says there are huge problems with the F-22 in this area.
http://www.flightglobal.com/blogs/the-d ... -lock.html


Interesting, if rather predictable that you bring that up and I can only assume you feel the allagations have been proven to be true otherwise why bring them up in such an excitable "told you so" manner.
Just a thought but perhaps it would be wise to wait and see the outcome of the case before wasting anymore time on what probably boils down a to a bitter engineer who's out for revenge, money and publicity.
Note also how there seems to be zero evidence to support his allagations too. I mean as far as I know and the USAF know the F-22 performs well beyond what it was ever meant to and i'm sure these alleged defects would have crushed that reality. In short the evidence is already stacked greatly against these wild allegations. Wink
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