sulman
Posts: 1963
Joined: Wed Mar 03, 2004 5:09 am

Small Mound On 747-100 Empennage. What Is It?

Sun Nov 28, 2004 11:56 pm


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Second time I've seen this - I'm referring to the small bump at the base of the empennage - anyone know what was in there?

Cheers


James
It takes a big man to admit they are wrong, and I am not a big man.
 
by738
Posts: 2445
Joined: Wed Sep 20, 2000 7:59 am

RE: Small Mound On 747-100 Empennage. What Is It?

Mon Nov 29, 2004 12:23 am

Isnt it some sort of communications radome ?
 
VgnAtl747
Posts: 1333
Joined: Fri Apr 06, 2001 3:59 am

RE: Small Mound On 747-100 Empennage. What Is It?

Mon Nov 29, 2004 12:31 am

I would assume, as By738 said, that it is a communications radome of some sort.
Work Hard. Fly Right. Continental Airlines
 
Vikingair
Posts: 100
Joined: Thu Aug 05, 2004 7:20 am

RE: Small Mound On 747-100 Empennage. What Is It?

Mon Nov 29, 2004 1:38 am

Elevator for supplies to upper deck.
 
radarcontact
Posts: 50
Joined: Sat Oct 30, 2004 4:03 am

RE: Small Mound On 747-100 Empennage. What Is It?

Mon Nov 29, 2004 1:45 am

I know KLM has some of it's 747's equipped with a sort of a weather station, which provides up to date weather reports over remote areas such as oceans. Don't know how it exactly works, but it looks like the bump (antenna) on this 747-100.
Live and learn
 
radarcontact
Posts: 50
Joined: Sat Oct 30, 2004 4:03 am

RE: Small Mound On 747-100 Empennage. What Is It?

Mon Nov 29, 2004 1:51 am

Or maybe it's an additional antenna to enable contact between the aircraft's systems and the operations control centre?
Live and learn
 
sulman
Posts: 1963
Joined: Wed Mar 03, 2004 5:09 am

RE: Small Mound On 747-100 Empennage. What Is It?

Mon Nov 29, 2004 2:07 am

Here's another example:


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It takes a big man to admit they are wrong, and I am not a big man.
 
air2gxs
Posts: 1443
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RE: Small Mound On 747-100 Empennage. What Is It?

Mon Nov 29, 2004 2:42 am

I assume you mean the bulge aft of the upperdeck, not at the base of the empennage. It is the old SATCOM (sattelite communications) antenna. The system, as I recall, did not gain very wide acceptance. It was supposed to supplement or even replace HF, but HF is still here.
 
na
Posts: 9173
Joined: Sun Dec 12, 1999 3:52 am

RE: Small Mound On 747-100 Empennage. What Is It?

Mon Nov 29, 2004 8:05 am

On most 747-100s and early 747-200Bs (all 747s built up until the year 1974 had this small additional hump) this housing was removed in the later 70s or early 80s, mostly during the first D-check. Only very few 747s carried this distinctive hump to the end, like a single Pan Am jet, N749PA "Clipper Dashing Wave", scrapped in 1992, and one 747-200 of PIA which I photographed in the late 90s still with this device (that was AP-AYV or -AYW).
 
meister808
Posts: 924
Joined: Sat Jan 01, 2000 11:45 am

RE: Small Mound On 747-100 Empennage. What Is It?

Mon Nov 29, 2004 8:51 am

For clarification:

Empennage=Tail section.

-Meister
Twin Cessna 812 Victor, Minneapolis Center, we observe your operation in the immediate vicinity of extreme precipitation