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Antenna On Top Of Fuselage 747  
User currently offlineHAWK21M From India, joined Jan 2001, 31201 posts, RR: 58
Posted (11 years 7 months 3 weeks 3 days 16 hours ago) and read 1973 times:


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Whats the rear most antenna on the top of the B747 fuselage for.
regds
HAWK.


Think of the brighter side!
5 replies: All unread, jump to last
 
User currently offlineDC-10Tech From United States of America, joined Jun 2001, 298 posts, RR: 3
Reply 1, posted (11 years 7 months 3 weeks 3 days 14 hours ago) and read 1942 times:

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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User currently offlineDalmd88 From United States of America, joined Jul 2000, 2365 posts, RR: 15
Reply 2, posted (11 years 7 months 3 weeks 3 days 13 hours ago) and read 1931 times:

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.

User currently offlineMr Spaceman From Canada, joined Mar 2001, 2780 posts, RR: 15
Reply 3, posted (11 years 7 months 3 weeks 3 days 12 hours ago) and read 1928 times:

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"
User currently offlineDC-10Tech From United States of America, joined Jun 2001, 298 posts, RR: 3
Reply 4, posted (11 years 7 months 3 weeks 3 days 12 hours ago) and read 1926 times:

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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User currently offlineDalmd88 From United States of America, joined Jul 2000, 2365 posts, RR: 15
Reply 5, posted (11 years 7 months 3 weeks 3 days ago) and read 1902 times:

Correct, it does look large for a GPS.
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