Sponsor Message:
Aviation Technical / Operations Forum
My Starred Topics | Profile | New Topic | Forum Index | Help | Search 
Boeing 747 Photo Question  
User currently offlineB7474 From United States of America, joined Mar 2001, 266 posts, RR: 0
Posted (14 years 3 months 4 weeks 1 day 16 hours ago) and read 3740 times:

Click for large version
Click here for full size photo!

Photo © Kjell nilsson

I just wanted to know what is that bump on the top of this Boeing 747-100 not the hump where the passengers and the cockpit is but there's like a grey circle with a bump. It can also be seen if you look on top of Dutch. Does anyone know what it is or is it just dirt?

4 replies: All unread, jump to last
User currently offlinePrebennorholm From Denmark, joined Mar 2000, 7137 posts, RR: 53
Reply 1, posted (14 years 3 months 4 weeks 1 day 15 hours ago) and read 3610 times:

A wild and uneducated guess: It's some sort of satellite antenna contained in a de-electric (glassfibre) container.

Probably for pax pay-phones, maybe GPS, maybe both.

Regards, Preben Norholm

Always keep your number of landings equal to your number of take-offs
User currently offlineLY744 From Canada, joined Feb 2001, 5536 posts, RR: 9
Reply 2, posted (14 years 3 months 4 weeks 1 day 11 hours ago) and read 3546 times:

Keep in mind that the picture was taken in 1972! That rules GPS, and probably pax pay-phones out.  Smile

In any case, I believe this has been discussed before, so someone should be able to come up with the right answer soon enough.


Pacifism only works if EVERYBODY practices it
User currently offlineAir2gxs From , joined Dec 1969, posts, RR:
Reply 3, posted (14 years 3 months 4 weeks 1 day 5 hours ago) and read 3509 times:

Its an old SATCOM (satelite (sp?) communications) antenna. My understanding was that it was all the rage in the early to mid-seventies, but never went anywhere.

User currently offlineNa From Germany, joined Dec 1999, 11585 posts, RR: 9
Reply 4, posted (14 years 3 months 3 weeks 20 hours ago) and read 3297 times:

Most pre -75 built 747s carried this antenna case, but it cannot have been such an important antenna system. By far the most of these 747s were modified from the mid 70s on and this (ugly) small hump was replaced. Today there is just one 747 left worldwide with this device (a 747-282B of PIA).

Top Of Page
Forum Index

Reply To This Topic Boeing 747 Photo Question
No username? Sign up now!

Forgot Password? Be reminded.
Remember me on this computer (uses cookies)
  • Tech/Ops related posts only!
  • Not Tech/Ops related? Use the other forums
  • No adverts of any kind. This includes web pages.
  • No hostile language or criticizing of others.
  • Do not post copyright protected material.
  • Use relevant and describing topics.
  • Check if your post already been discussed.
  • Check your spelling!
Add Images Add SmiliesPosting Help

Please check your spelling (press "Check Spelling" above)

Similar topics:More similar topics...
Boeing-747 Rudder Question? posted Wed Jul 24 2002 20:30:53 by Mr Spaceman
747 Cockpit Photo Question posted Fri Jul 20 2001 19:53:51 by B7474
Boeing 747 Classic Panel Question posted Wed May 30 2001 13:44:07 by SAAFlight202
Boeing 747-400BCF posted Sun Oct 15 2006 13:43:57 by Qantas744ER
Who Flies The New Boeing 747 400/LCF? posted Sun Sep 10 2006 08:52:05 by ElpinDAB
Exact Boeing 747-400 Engine Data? posted Thu Aug 24 2006 18:26:05 by Qantas744ER
Boeing 747-200 MR's posted Sun Jul 30 2006 08:18:48 by Jetline
Did A Boeing 747 -100 Have Any New Tech? posted Fri Jul 28 2006 22:09:08 by 747400sp
Rolls-Royce Boeing 747 Flying Test Bed posted Wed Jul 26 2006 12:43:03 by CCA
Depleted Uranium In Boeing 747? posted Wed May 17 2006 09:56:59 by Bjornstrom

Sponsor Message:
Printer friendly format