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Elite 1K Joined: Jul 20, 2005 Posts: 1034 Status: Offline

Thats need-to-know information and not to sound rude, but if your asking, then you don't need to know. Reading some of the other threads: AWACS can "see" the Raptor just fine, again, you don't need to know how exactly. For normal training operations, this isn't classified information, the Raptor uses a bolt on device much like the F-117. You can readily see it in many of the photo's of the plane.

This is not meant as an attack so please don't take it that way. There is lots of credible information that has been released about how the Raptor survives and operates. How its systems operate to allow these things, you don't really need to know and thats just the cold hard truth. I know tons of crap about the Raptor...would I like to know more? Hell yes! But I don't have a need to so...there it is.

Safe Flying!

Checksixx

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Orangeburst wrote:

we used to hear alot about EMP shielding of wiring and electronics on aircraft

Considering the Raptor is a flying supercomputer and using off shelf processors, is it resistant to EMP effects?

Semiconductors turn into a three way short circuit when bombarded by EM energy. Thin film resistors are used on circuits them selves when this is require. These resistors are common on almost all microwave ICs. There are made of Tantalum.
There are techniques for shielding against EMP that weigh far less these days. Still every path or potential path between the positive and negative supply must be protected. This can be done by shielding wires and the usage of polarized layers to defeat EMP.

The 2005/2006 issue of Janes Book of Aircraft (annual) makes mention that the F-35 uses embedded wires along the edges of access panels to prevent the openings between the panels and the body of the aircraft to reflect RF energy. Also is mentioned that some panels use "mesh wire" below the surfaces of areas where RAM can not be used. This same sort of technique can be used to shield the parts from EMP

This in part is why the F-35 will cost one-tenth that of the F-22 in maintaining areas of the aircraft where a low RCS is required.

LinkF16SimDude wrote:

I ain't no "nookuler" physicist

You are good at phonics though!

LinkF16SimDude wrote:

The EMP "laydown" of a nuclear burst

Gamma rays actually radiate spherically from the blast point, creating space EMP

Remember the USA used to test above ground H-bombs in Nevada, it never affected the electrical utilities in Las Vegas. The testing sight might have changed if Las Vegas had to shut down everytime. Yuka Flats is not very far away from Las Vegas. Las Vegas several times felt the ground shock wave from the nuclear bomb blast. I have no idea as to how away far air traffic was affected.

The light from the explosion is very bright. I remember it being around fifthteen years old and delievered morning news papers, around five AM in San Francisco. Suddenly, the sky got bright, reflections off home windows all hurt my eyes. The bright light lasted for at least ten seconds then disappeared. Later that day, I heard on the news an H-bomb was detonated that morning. Las Vegas is around four hundred plus miles on a straight line from San Francisco.

Adrian

Elite 3K Joined: May 10, 2004 Posts: 3021 Status: Offline

Quote:

Remember the USA used to test above ground H-bombs in Nevada, it never affected the electrical utilities in Las Vegas. The testing sight might have changed if Las Vegas had to shut down everytime. Yuka Flats is not very far away from Las Vegas. Las Vegas several times felt the ground shock wave from the nuclear bomb blast. I have no idea as to how away far air traffic was affected.

The light from the explosion is very bright. I remember it being around fifthteen years old and delievered morning news papers, around five AM in San Francisco. Suddenly, the sky got bright, reflections off home windows all hurt my eyes. The bright light lasted for at least ten seconds then disappeared. Later that day, I heard on the news an H-bomb was detonated that morning. Las Vegas is around four hundred plus miles on a straight line from San Francisco.

Adrian

Adrian,

Just a bit of clarification here Wink

. All but one of the tests at the Nevada Test Site were fission or A bombs, not H bombs due to a policy of not testing H bombs over the continental U.S.

I'm also fairly certain that all of the tests in Nevada were below the visual horizon from Las Vegas due to the mountains inbetween here and there. Those mountains probably shielded a good portion of the EMP energy. I could be wrong here, so please correct me if that's the case Smile

. I'll also check in with a friend who used to be involved in the testing and helped to establish the Atomic Testing Museum here in Vegas - something tells me he'll have the answers.

Most of the dedicated EMP tests were done with explosions either in the upper atmosphere or in space - not a whole lot of air to goof things up that way if I remember right. One test accidentally knocked out power to about half of Hawaii - oops Doh

!

Elite 1K Joined: Jul 20, 2005 Posts: 1034 Status: Offline

Parrothead you are correct. The Nevada Test Site area is definately below the visual horizon due to the mountains. I also find it VERY hard to believe that light from a test in Nevada would be bright enough in San Fransico to hurt someone's eyes. This is pretty much because there wasn't a test at the NTS anytime near the time mentioned above that would have even been seen. See below.

NTS AM Tests:

Evans -- Underground -- Midnight
Futtock -- Underground -- 11 AM
Logan -- Underground -- 6AM
Mars -- Underground -- Midnight
Pascal-A -- Underground -- 8AM
Piton-C -- Underground -- 11:45AM
Saturn -- Underground -- 12:59AM
Umber -- Underground -- 11:25AM
Venus -- Underground -- 1AM

Elite 1K Joined: May 26, 2005 Posts: 1127

Yep, the Starfish Prime shot. 1400 kilotons @ 400km. Knocked out electronics, street lights and a microwave repeater 800 miles away. Not to mention creating an artifical aurora and killing a few satellites in LEO. It also created an artificial Van Allen belt that eventually crippled 1/3 of all satellites in orbit at the time. Most of these effects caught the nuke boys totally by suprise.

I can imagine the conversation:

Hey Bob, what happens when you light off an H-bomb above the atmosphere?
Geez Fred, I dunno. Let's try it.
*BOOM*
Oh sh$&!

Elite 3K Joined: May 10, 2004 Posts: 3021 Status: Offline

Thanks guys Smile

!

Guysmiley - that's the shot I was thinking about Very Happy

!

Guysmiley wrote:

Hey Bob, what happens when you light off an H-bomb above the atmosphere?
Geez Fred, I dunno. Let's try it.
*BOOM*
Oh sh$&!

!

checksixx wrote:

also find it VERY hard to believe that light from a test in Nevada would be bright enough in San Fransico to hurt someone's eyes.

I made no mention of underground test, I wrote what caused the light was an above ground test and..... yes the light provided at five AM was a surprise plus being very bright to eyes that were accustom to the dark except for a few street lights. I was bright enough I could not figured out from which direction the source was.

checksixx wrote:

This is pretty much because there wasn't a test at the NTS anytime near the time mentioned above that would have even been seen.

Actually, during this time period of the mid-1950's there was a lot of testing going on. The last of the atmospheric test were done in Nevada in November 1962. At that time it was most above ground, the mandate to test underground came later.
The Nevada Test Site is located 65 miles northwest of Las Vegas on I-95, a restricted area of 5,470 square miles.

checksixx wrote:

One test accidentally knocked out power to about half of Hawaii

I do remember this incident.

I am writing of what I expeienced, if you chose to believe it fine, if you don't... hey that is fine also.
I am not a missonary, believe what you wish!

Adrian

Elite 1K Joined: Aug 19, 2004 Posts: 1090

Quote:

I am not a missonary, believe what you wish!

That's one of the funniest one-liners I've read in a while. LOL! I'll have to remember to use that one myself. Nice. Very Happy

Elite 1K Joined: Jul 20, 2005 Posts: 1034 Status: Offline

avon1944 wrote:

checksixx wrote:

also find it VERY hard to believe that light from a test in Nevada would be bright enough in San Fransico to hurt someone's eyes.

I made no mention of underground test, I wrote what caused the light was an above ground test and..... yes the light provided at five AM was a surprise plus being very bright to eyes that were accustom to the dark except for a few street lights. I was bright enough I could not figured out from which direction the source was.

Actually it was ME that mentioned underground tests and I'm not sure how you could confuse that. I mentioned them because ALL of the AM tests in Nevada were underground. So I would love to know what you saw, cause that wasn't it. This is documented through DOE and NTS.

checksixx wrote:

This is pretty much because there wasn't a test at the NTS anytime near the time mentioned above that would have even been seen.

Actually, during this time period of the mid-1950's there was a lot of testing going on. The last of the atmospheric test were done in Nevada in November 1962. At that time it was most above ground, the mandate to test underground came later.
The Nevada Test Site is located 65 miles northwest of Las Vegas on I-95, a restricted area of 5,470 square miles.

You should see my above post referring to AM testing there. Also, I'm familiar with where it is as I've stayed on the site.

checksixx wrote:

One test accidentally knocked out power to about half of Hawaii

I do remember this incident.

I am writing of what I expeienced, if you chose to believe it fine, if you don't... hey that is fine also.
I am not a missonary, believe what you wish!
Uhhh, I didn't write that bro, time to check your glasses. I believe what I know for fact.
Adrian

Sorry "checksixx" for attributing to you statements made by another.

One hundred (100) atmospheric tests and 804 underground tests were detonated at the Nevada Test Site (NTS). URL;
http://ndep.nv.gov/boff/photo01.htm

It appears my experience in NOT unique! I know what I saw.
URL;
http://www.aracnet.com/~histgaz/atomi/

View From Vegas
http://ndep.nv.gov/boff/vegasview.jpg

A photo taken in the AM of 08/07/57
http://ndep.nv.gov/boff/stokes.jpg

Adrian

Elite 1K Joined: Jul 20, 2005 Posts: 1034 Status: Offline

Guess you can't figure it out. NTS website & DOE have full lists with codenames and times on them. You should take a look at them.

Check

Newbie Joined: Nov 20, 2006 Posts: 3 Status: Offline

checksixx wrote:

Guess you can't figure it out. NTS website & DOE have full lists with codenames and times on them. You should take a look at them.

Check

Can i see a link please thnx i'm not familiar with those websites . Embarassed

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