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What's This Object On The 747-SP's Wing?  
User currently offlineMr Spaceman From Canada, joined Mar 2001, 2787 posts, RR: 9
Posted (10 years 10 months 3 weeks 4 days 2 hours ago) and read 5157 times:

Hi guys.

I'm curious about what the square glass object is that's beside the 2 landing lights on this United Arab Emirates 747-SP-Z5.

I suspect this 747-SP is a government aircraft that flys with VIP's onboard which would explain the radar dome on top of the fuslage (I think that's what it is), and the electronic counter measures (ECM) that are located on the back of each engine pylon for the purpose of detecting a heat seeking surface to air missle (SAM). I think there's also a missle detector under the APU exhaust in the tail cone.

I've seen these ECM missle detectors before on Gulfstream V bizjets and the USA's "Air Force One" 747, but I've never seen a square glass object before like the one in this photo.

Does anyone know what it is?

A guess on my part would be that it's an ECM for detecting lazer guided SAM's or maybe it's simply a camera for some reason.

Check it out ...............

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Photo © D.Lausberg



You can see the ECM's detectors on the engine pylons in these photos.


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Photo © JetPix
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Photo © Tim Feise - AirTeamImages



Thanks,

Chris  Smile




"Just a minute while I re-invent myself"
12 replies: All unread, jump to last
 
User currently offlineCFIcraigAPA From United States of America, joined Jan 2004, 223 posts, RR: 4
Reply 1, posted (10 years 10 months 3 weeks 4 days 1 hour ago) and read 5067 times:

Looks like some kind of IR or imaging sensor. Maybe for synthetic vision?


Prior Proper Preparation Prevents Piss-Poor Performance
User currently offlineMr Spaceman From Canada, joined Mar 2001, 2787 posts, RR: 9
Reply 2, posted (10 years 10 months 3 weeks 4 days ago) and read 5066 times:

Hello CFIcraigAPA.

Thanks for your reply.

Yeah, I agree with you that it's very possible this object is an Infra Red sensor for some purpose, such as synthetic vision that's generated on a HUD (like many fighter jets have) so that the 747-SP can fly through clouds and the pilots can still see the terrain, or even see a runway when landing in thick fog, etc.

The reason I mentioned a camera as a possibility is because it looks like it has lenses of some sort inside of it.

I tried finding some other -Z5 models of 747-SP's to compare this one to, but it appears to be the only 747-SP-Z5 version.

Chris  Smile



"Just a minute while I re-invent myself"
User currently offlineStaffan From , joined Dec 1969, posts, RR:
Reply 3, posted (10 years 10 months 3 weeks 4 days ago) and read 5048 times:

My guess is that it's for missile detection.

Staffan


User currently offlineS.p.a.s. From Liechtenstein, joined Mar 2001, 967 posts, RR: 2
Reply 4, posted (10 years 10 months 3 weeks 4 days ago) and read 5045 times:

I second Staffans guess...

I would say it is a IR jammer placed in such way that it jams the IR signature from the landing lights (which can be very hot indeed)

Rgds

RS



"ad astra per aspera"
User currently offlineMr Spaceman From Canada, joined Mar 2001, 2787 posts, RR: 9
Reply 5, posted (10 years 10 months 3 weeks 4 days ago) and read 5034 times:

Hi guys.

OK, so a few of you are thinking that it is for missile detection. Well, I think that S.p.a.s.'s idea of it being used to jam the IR signature from the landing lights makes a lot of sense ............ especially because of it's locations right beside the lights.

What a crazy world we live in eh!  Nuts

Chris  Smile



"Just a minute while I re-invent myself"
User currently offlineL-188 From United States of America, joined Jul 1999, 29841 posts, RR: 58
Reply 6, posted (10 years 10 months 3 weeks 3 days 15 hours ago) and read 4886 times:

It sure looks like an IR jammer to me too.

Those landing lights put out some serious heat.



OBAMA-WORST PRESIDENT EVER....Even SKOORB would be better.
User currently offlineFredT From United Kingdom, joined Feb 2002, 2185 posts, RR: 26
Reply 7, posted (10 years 10 months 3 weeks 3 days 13 hours ago) and read 4870 times:

Read a discussion of those a while ago, IR signature detectors to trigger the flare launches if an IR missile is launched IIRC.

Cheers,
Fred



I thought I was doing good trying to avoid those airport hotels... and look at me now.
User currently offline747Teach From United States of America, joined Nov 2000, 176 posts, RR: 1
Reply 8, posted (10 years 10 months 3 weeks 3 days 5 hours ago) and read 4751 times:

Mr. Spaceman: The rectangle inboard of the landing lights is actually a conditioned air outlet. The copper colored area is the temperature sensor. By closing the pneumatic isolation valve for the number 3 engine, and opening the pneumatic crossbleeds, cold conditioned air will flow through the pneumatic duct and exhaust out the louver you see. This floods the area around the escalator with cool air, so the royal personage will remain comfortable until he enters his limosine. Its good to be the king. Regards,

User currently offlineWannabe From United States of America, joined Jun 1999, 677 posts, RR: 3
Reply 9, posted (10 years 10 months 3 weeks 3 days 2 hours ago) and read 4676 times:

747Teach,
Somehow I think we are being flooded with more than cool air.


User currently offlineATCDWC From United States of America, joined Feb 2004, 12 posts, RR: 0
Reply 10, posted (10 years 10 months 3 weeks 3 days ago) and read 4628 times:

Seems to be some sort sort of infared detection equipment or something to that effect.

~Chris


User currently offlineMr Spaceman From Canada, joined Mar 2001, 2787 posts, RR: 9
Reply 11, posted (10 years 10 months 3 weeks 2 days 22 hours ago) and read 4608 times:

Hi guys.

Thanks for your replies.

>> 747Teach, Yes Sir, just as Mel Brooks said it in "The History Of The World" ........
........"It's good to be the king!"

Your answer sounds great! Infact the chair on the escalator probably has airconditioning vents right in the seat cusion to keep the Royal personage happy.  Laugh out loud

I have one question though. Why does this 747-SP have one of these rectangular conditioned air outlets & exhaust louver on both wings??? There's no belly escalator on the port side.

As you can see, they're on both wings.


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Photo © D.Lausberg
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Photo © Rob van Ringelesteijn



These 747-SP's sure look strange & funny from below.


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Photo © Konstantin von Wedelstaedt



Chris  Smile



"Just a minute while I re-invent myself"
User currently offline747Teach From United States of America, joined Nov 2000, 176 posts, RR: 1
Reply 12, posted (10 years 10 months 3 weeks 2 days 6 hours ago) and read 4491 times:

Uhoh, I think they're on to me. Regards,

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