david b.
Posts: 2894
Joined: Fri Jun 15, 2001 7:18 pm

What Are Those

Sun Oct 07, 2001 11:58 am

On some planes I seen, a small long piece of metal protudes from the wing. I can't find a pic of it but seen it many times. Its located on the very end about a foot or two long. Im not sure if you understand what im talking about, but if you do, then you can answer my question:

What is that and what is used for?



Teenage-know-it-alls should be shot on sight
 
david b.
Posts: 2894
Joined: Fri Jun 15, 2001 7:18 pm

RE: What Are Those

Sun Oct 07, 2001 11:59 am

Is not a winglet, It looks sort of like a antanna.
Teenage-know-it-alls should be shot on sight
 
Qantas737
Posts: 714
Joined: Thu Jul 13, 2000 8:34 am

RE: What Are Those

Sun Oct 07, 2001 12:24 pm

Do you mean the piece at the end of the wing of say for expample a 747-100/200/300? I have also been wondering what exactly that is for.
 
I Like To Fly
Posts: 1070
Joined: Wed Feb 28, 2001 1:17 pm

RE: What Are Those

Sun Oct 07, 2001 12:25 pm

Are you talking about what was discussed here:
http://www.airliners.net/discussions/tech_ops/read.main/22499/4/

???

That would be my best guess. Smile
 
OPNLguy
Posts: 11191
Joined: Tue Jun 15, 1999 11:29 am

RE: What Are Those

Sun Oct 07, 2001 12:42 pm

Based upon your description, it sounds like either a fuel dump nozzle...


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Photo © Peter D. Baumgartner



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Photo © Richard Zeman



..or on the older 747s, and HF (high frequency) radio antenna...


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Photo © Wilsam Cheung



If neither of these are it, any other details you can recall would be helpful...
ALL views, opinions expressed are mine ONLY and are NOT representative of those shared by Southwest Airlines Co.
 
Buzz
Posts: 694
Joined: Sun Nov 21, 1999 11:44 pm

Antennas

Sun Oct 07, 2001 11:58 pm

Hi David B, Buzz here. I'm used to seeing the High Freq. radio antenna on the wingtips of the older 747's. Let's see, the old 707's had it pointing forward from the vertical fin...... so it could spear birds? (grin)
On 757's, 737's and 767's it's built into the leading edge of the vertical fin.
On DC-8's it was built into the top 5 feet of the vertical fin. I can't remember where it was on a DC-10.
Why use HF? because it's a (relatively) low frequency (2,5 -- 20 hz) and it bounces off the ionosphere for long range communication. The normal VHF radios are line-of-sight only, once you get 150 miles away you're out of sight....... that is if the Earth really is round.
HF radios are not easy to talk / listen on. Lots of things interfere with the signal you want to listen to. It's like listening to AM radio at night sometimes. But from the Pacific Northwest (USA) i can hear the Aussie BBC, and time signals from Ft Collins Colorado.
g'day
 
david b.
Posts: 2894
Joined: Fri Jun 15, 2001 7:18 pm

RE: What Are Those

Mon Oct 08, 2001 2:51 am

Yep, that little antanna was a HF antanna. THank you guys.
Teenage-know-it-alls should be shot on sight
 
air2gxs
Posts: 1443
Joined: Mon Jun 18, 2001 1:29 pm

RE: What Are Those

Mon Oct 08, 2001 7:29 pm

Little? The thing is every bit of 4 ft long if its a foot.

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