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HAWK21M
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Joined: Fri Jan 05, 2001 10:05 pm

Antenna On Top Of Fuselage 747

Sat Sep 29, 2001 2:19 am


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Photo © Chris Sheldon


Whats the rear most antenna on the top of the B747 fuselage for.
regds
HAWK.
I may not win often, but I damn well never lose!!! ;)
 
DC-10Tech
Posts: 291
Joined: Fri Jun 15, 2001 6:40 pm

RE: Antenna On Top Of Fuselage 747

Sat Sep 29, 2001 4:13 am

That looks to me to be an ADF loop antenna. It could also be a TCAS or SATCOM antenna, but the shape doesn't look quite right to be either of those. Anybody with B747 experience know?
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Dalmd88
Posts: 2447
Joined: Fri Jul 28, 2000 3:19 am

RE: Antenna On Top Of Fuselage 747

Sat Sep 29, 2001 5:53 am

Not TCAS. that one is relatively flat, usually mounted above the cockpit. Adf I think are usually on the bottom, not sure though. My guess is GPS.
 
Mr Spaceman
Posts: 2723
Joined: Thu Mar 15, 2001 5:09 am

RE: Antenna On Top Of Fuselage 747

Sat Sep 29, 2001 6:10 am

Hi guys.

I agree with Dalmd88. I believe that it is a GPS antenna, although I'm not 100% sure.

Also, I think it's called a BOAT antenna...because of it's shape.

Chris  Smile

"Just a minute while I re-invent myself"
 
DC-10Tech
Posts: 291
Joined: Fri Jun 15, 2001 6:40 pm

RE: Antenna On Top Of Fuselage 747

Sat Sep 29, 2001 6:16 am

It looks like an ADF loop to me. I know the TCAS is usually above and below section 41, but I have seen some placed in the rear. Some models do stick up that far, but they are rectangular shape. I have never seen a GPS antenna that large either. I mentioned TCAS because I don't see an upper TCAS on this plane... somebody must know!
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Dalmd88
Posts: 2447
Joined: Fri Jul 28, 2000 3:19 am

RE: Antenna On Top Of Fuselage 747

Sat Sep 29, 2001 6:16 pm

Correct, it does look large for a GPS.

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