Max Q
Topic Author
Posts: 5644
Joined: Wed May 09, 2001 12:40 pm

Extra 'hump' On Early B747's

Mon Apr 15, 2013 10:09 pm

The early 747's /100 series and maybe some early /200's had an extra, small hump between the aft end of the upper deck and the fuselage.


Can't post it here so maybe someone can, anyone know what this was ?
The best contribution to safety is a competent Pilot.
 
Airvan00
Posts: 236
Joined: Thu Oct 30, 2008 1:06 am

RE: Extra 'hump' On Early B747's

Mon Apr 15, 2013 10:22 pm

I thought it was the covering for a small satellite dish or some othe communication device.
 
BoeingGuy
Posts: 3945
Joined: Fri Dec 10, 2010 6:01 pm

RE: Extra 'hump' On Early B747's

Mon Apr 15, 2013 10:31 pm

Here's a good photo of it here:

http://www.airliners.net/photo/Unite...Airlines/Boeing-747-122/2223062/L/

Interesting question. I thought it was just part of the structure design, but we'll see if someone else knows differently. It's not the TCAS antenna since airplanes were not equipped with TCAS at the time that photo was taken. Best guess is it's just the way the structure was designed.
 
roseflyer
Posts: 9606
Joined: Fri Feb 13, 2004 9:34 am

RE: Extra 'hump' On Early B747's

Mon Apr 15, 2013 10:31 pm

The only humps or auxiliary equipment on top of a fuselage that I know of is satellite communication systems, however the first satellite communication system for airplanes wasn't developed until 1987.

[Edited 2013-04-15 15:37:49]
If you have never designed an airplane part before, let the real designers do the work!
 
oly720man
Posts: 5754
Joined: Fri May 21, 2004 7:13 am

RE: Extra 'hump' On Early B747's

Mon Apr 15, 2013 11:03 pm

Satcom aerial

See remarks for


View Large View Medium
Click here for bigger photo!

Photo © Steve Fitzgerald

wheat and dairy can screw up your brain
 
Max Q
Topic Author
Posts: 5644
Joined: Wed May 09, 2001 12:40 pm

RE: Extra 'hump' On Early B747's

Tue Apr 16, 2013 1:34 am

Don't understand how it could be a Satcom Antennae fairing as satellite communication was in its infancy when the B747 rolled out in 1969.


The same year Neil and Buzz landed on the moon.


Seems very hard to believe.
The best contribution to safety is a competent Pilot.
 
LTC8K6
Posts: 1445
Joined: Fri Jun 05, 2009 8:36 pm

RE: Extra 'hump' On Early B747's

Tue Apr 16, 2013 2:22 am

http://www.airliners.net/photo/0827209/L/

I think it's pretty clearly some sort of instrumentation/radio/INS pod.

Hump:

http://www.airliners.net/photo/0952818/M/

Hump gone a few years later:

http://www.airliners.net/photo/0244094/M/
 
Max Q
Topic Author
Posts: 5644
Joined: Wed May 09, 2001 12:40 pm

RE: Extra 'hump' On Early B747's

Tue Apr 16, 2013 3:12 am

Could be for an Antennae I suppose, it is a very large fairing but I guess that's what you would expect for that era and the level of technology being used.
The best contribution to safety is a competent Pilot.
 
LTC8K6
Posts: 1445
Joined: Fri Jun 05, 2009 8:36 pm

RE: Extra 'hump' On Early B747's

Tue Apr 16, 2013 3:40 am

IIRC, it was for an early system that never really "took off".
 
User avatar
7BOEING7
Posts: 2373
Joined: Fri Oct 12, 2012 5:28 pm

RE: Extra 'hump' On Early B747's

Tue Apr 16, 2013 4:07 pm

Quoting Max Q (Reply 5):
Don't understand how it could be a Satcom Antennae fairing as satellite communication was in its infancy when the B747 rolled out in 1969.

Yes, it was in it's infancy, that's why the "hump" didn't last long and was removed a few years later.

See the following thread:


What Is On This United 747-122? (by flightsimer Feb 6 2013 in Civil Aviation)?threadid=5683076&searchid=5683110&s=747+hump+satelite#ID5683110
 
citationjet
Posts: 2259
Joined: Sun Mar 09, 2003 2:26 am

RE: Extra 'hump' On Early B747's

Tue Apr 16, 2013 5:06 pm

Quoting 7BOEING7 (Reply 9):
See the following thread:


What Is On This United 747-122? (by flightsimer Feb 6 2013 in Civil Aviation)?threadid=5683076&searchid=5683110&s=747+hump+satelite#ID5683110

Which in turn references this thread:
What's This Little Hump On The 747? (by Alphafloor Jul 22 2006 in Tech Ops)
Boeing Flown: 701,702,703;717;720;721,722;731,732,733,734,735,737,738,739;741,742,743,744,747SP;752,753;762,763;772,773.
 
BravoOne
Posts: 1360
Joined: Fri Apr 12, 2013 2:27 pm

RE: Extra 'hump' On Early B747's

Tue Apr 16, 2013 9:26 pm

Talking to some old timers at Boeing and they say that this first appeared on Line #05, TWA. Don't bet the farm on the accuracy as they are really old timers.

Who is online

Users browsing this forum: No registered users and 8 guests