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Extra 'hump' On Early B747's  
User currently onlineMax Q From United States of America, joined May 2001, 4064 posts, RR: 19
Posted (1 year 1 day 8 hours ago) and read 5157 times:

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.
11 replies: All unread, jump to last
 
User currently onlineAirvan00 From Australia, joined Oct 2008, 744 posts, RR: 1
Reply 1, posted (1 year 1 day 8 hours ago) and read 5005 times:

I thought it was the covering for a small satellite dish or some othe communication device.

User currently offlineBoeingGuy From United States of America, joined Dec 2010, 2879 posts, RR: 7
Reply 2, posted (1 year 1 day 7 hours ago) and read 4904 times:

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.


User currently onlineRoseflyer From United States of America, joined Feb 2004, 9375 posts, RR: 52
Reply 3, posted (1 year 1 day 7 hours ago) and read 4904 times:

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!
User currently offlineoly720man From United Kingdom, joined May 2004, 6604 posts, RR: 11
Reply 4, posted (1 year 1 day 7 hours ago) and read 4533 times:

Satcom aerial

See remarks for


View Large View Medium
Click here for bigger photo!

Photo © Steve Fitzgerald




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User currently onlineMax Q From United States of America, joined May 2001, 4064 posts, RR: 19
Reply 5, posted (1 year 1 day 4 hours ago) and read 4320 times:

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.
User currently onlineLTC8K6 From United States of America, joined Jun 2009, 946 posts, RR: 0
Reply 6, posted (1 year 1 day 4 hours ago) and read 4278 times:

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/


User currently onlineMax Q From United States of America, joined May 2001, 4064 posts, RR: 19
Reply 7, posted (1 year 1 day 3 hours ago) and read 4239 times:

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.
User currently onlineLTC8K6 From United States of America, joined Jun 2009, 946 posts, RR: 0
Reply 8, posted (1 year 1 day 2 hours ago) and read 4218 times:

IIRC, it was for an early system that never really "took off".

User currently offline7BOEING7 From United States of America, joined Oct 2012, 1305 posts, RR: 8
Reply 9, posted (1 year 14 hours ago) and read 3882 times:

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


User currently offlineCitationJet From United States of America, joined Mar 2003, 2368 posts, RR: 3
Reply 10, posted (1 year 13 hours ago) and read 3826 times:

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.
User currently offlineBravoOne From United States of America, joined Apr 2013, 177 posts, RR: 0
Reply 11, posted (1 year 8 hours ago) and read 3669 times:
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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.

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