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What Is This?  
User currently offlineHL From , joined Dec 1969, posts, RR:
Posted (13 years 8 months 1 week 3 days 21 hours ago) and read 1066 times:

guys,

take a look at the picture below and could anyone tell me what the wire like thing that goes from the middle of the 732 to the tail? What does it do? Do any other jets have this?


Click for large version
Click here for full size photo!

Photo © Mel Lawrence



thanks,

HL  Smile/happy/getting dizzy

12 replies: All unread, jump to last
 
User currently offlineIainhol From , joined Dec 1969, posts, RR:
Reply 1, posted (13 years 8 months 1 week 3 days 21 hours ago) and read 1014 times:

It is an ADF attena. They use it for naviagating.
Iain


User currently offlineBuff From Australia, joined Mar 2007, 0 posts, RR: 1
Reply 2, posted (13 years 8 months 1 week 3 days 19 hours ago) and read 986 times:

It's an HF radio communications antenna, old style. Newer ones are more compact and don't require a 1/2 wavelength "cut".

Best Regards,

Buff


User currently offlineIainhol From , joined Dec 1969, posts, RR:
Reply 3, posted (13 years 8 months 1 week 3 days 18 hours ago) and read 967 times:

-1 for me then!
Iain


User currently offlineOPNLguy From , joined Dec 1969, posts, RR:
Reply 4, posted (13 years 8 months 1 week 3 days 17 hours ago) and read 959 times:

As Buff mentioned, HF... Not all that many 737s had these, mostly the ones that operated overseas, where the navaids (back in the 60s and 70s) were primitive in many areas of the world. (Yeah, like some things have changed.) This was all pre-GPS, and back when INS/Omega was pretty expensive, and not necessarily cost-effective for some narrow-bodied operators..

At Air Florida, a couple of our ex-Singapore 737-100s had them, and I think we later removed them. I have a vague recollection of one of the wires on one of our aircraft detaching from the tail, and subsequently beating the hell out of the fuselage, but I can recall any particulars...

http://www.airliners.net/open.file?id=19887&WxsIERv=Qm9laW5nIDczNy0xMTI%3D&WdsYXMg=QWlyIEZsb3JpZGE%3D&QtODMg=TWlhbWkgLSBJbnRlcm5hdGlvbmFsIChNSUEgLyBLTUlBKQ%3D%3D&ERDLTkt=VVNBIC0gRmxvcmlkYQ%3D%3D&ktODMp=U2VwdGVtYmVyIDE5ODA%3D&WNEb25u=QW5kcmV3IEFic2hpZXI%3D&xsIERvdWdsY=OVYtQkZG&MgTUQtODMgKE=RnVsbCBjb2xvcnMgYnV0IHdpdGggU2luZ2Fwb3JlIHJlZ2lzdHJhdGlvbiA5Vi1CRkYuIFdhcyBsYXRlciByZS1yZWdpc3RlcmVkIE40OEFGLiBUaGlzIGFpcmNyYWZ0IHdhcyB0aGUgbGFzdCBCNzM3LTEwMCBidWlsdCAoIzE5NzcyLzIxNywgZGVsLjEwLzY5IHRvIE1BUyBhcyA5TS1BT1cpLg%3D%3D&WxsIERvd=YWY3MzdzcXJlZy5qcGc%3D&YXMgTUQtODMgKERD=ODM4&NEb25uZWxs=MTk5OC0xMi0wNw%3D%3D&TWNEb25uZWxsIE=MTcyLjEzNy45MS4yNDU%3D&static=yes


http://www.airliners.net/open.file?id=59598&WxsIERv=Qm9laW5nIDczNy0yNDJD&WdsYXMg=Um95YWwgQWlybGluZXM%3D&QtODMg=Rm9ydCBMYXVkZXJkYWxlIC0gSG9sbHl3b29kIEludGVybmF0aW9uYWwgKEZMTCAvIEtGTEwp&ERDLTkt=VVNBIC0gRmxvcmlkYQ%3D%3D&ktODMp=T2N0b2JlciA5LCAxOTk5&WNEb25u=QnJ1Y2UgTGVpYm93aXR6&xsIERvdWdsY=Qy1GTkFQ&MgTUQtODMgKE=T3BlcmF0aW5nIGFzIFJveWFsIGZsaWdodCAzNzEgYW5kIHByb3VkbHkgZGlzcGxheWluZyBoZXIgQ2FuYWRpYW4gcmVnaXN0cnkgQy1GTkFQIChkZWxpdmVyZWQgNi8xNi83MSkuIElmIHlvdSBsb29rIGNsb3NlbHkgeW91IGNhbiBzZWUgdGhlIEhGIGFudGVubmEgcnVubmluZyBmcm9tIHRoZSB0b3Agb2YgdGhlIGZ1c2VsYWdlIHRvIHRoZSB0YWlsLg%3D%3D&WxsIERvd=MC1DLUZOQVAuanBn&YXMgTUQtODMgKERD=MTE0&NEb25uZWxs=MTk5OS0xMi0yNg%3D%3D&TWNEb25uZWxsIE=MjAwLjE5My4xMzguMTgy&static=yes

http://www.airliners.net/open.file?id=107972&WxsIERv=Qm9laW5nIDczNy0xNTk%3D&WdsYXMg=QXZpYW5jYQ%3D%3D&QtODMg=U2VhdHRsZSAtIEJvZWluZyBGaWVsZCAoQkZJKQ%3D%3D&ERDLTkt=VVNBIC0gV2FzaGluZ3Rvbg%3D%3D&ktODMp=Tm92ZW1iZXIgMTk2OA%3D%3D&WNEb25u=TWVsIExhd3JlbmNl&xsIERvdWdsY=SEstMTQwNFg%3D&MgTUQtODMgKE=KGNuIDE5NjgwLzk0LCBkZWwuMTEvNjgpIC0gc2hvcnRseSB0byBXZXN0R2VybUFGLEFsb2hhLEFpckNhbGlmLkdBVFg%3D&WxsIERvd=QXZpYW5jYTczNzE1OUhLMTQwNGJmaTExNjguanBn&YXMgTUQtODMgKERD=Mzkw&NEb25uZWxs=MjAwMC0wOS0wNg%3D%3D&TWNEb25uZWxsIE=MTUyLjE2My4yMDQuNjk%3D&static=yes

http://www.airliners.net/open.file?id=90697&WxsIERv=Qm9laW5nIDczNy0xMTI%3D&WdsYXMg=TVNBIE1hbGF5c2lhLVNpbmdhcG9yZSBBaXJsaW5lcw%3D%3D&QtODMg=U2VhdHRsZSAtIEJvZWluZyBGaWVsZCAoQkZJKQ%3D%3D&ERDLTkt=VVNBIC0gV2FzaGluZ3Rvbg%3D%3D&ktODMp=TWF5IDE5NzE%3D&WNEb25u=TWVsIExhd3JlbmNl&xsIERvdWdsY=OU0tQU9V&MgTUQtODMgKE=OU0tQU9VICgjMTk3NjgvMTg0LCBkZWwuMDcvNjkpLg%3D%3D&WxsIERvd=TVNBNzM3MjlNQURVYmZpNTcxLmpwZw%3D%3D&YXMgTUQtODMgKERD=MzA1&NEb25uZWxs=MjAwMC0wNi0yMw%3D%3D&TWNEb25uZWxsIE=MjA4LjguNTcuMg%3D%3D&static=yes


User currently offlineSushka From United States of America, joined Nov 1999, 4784 posts, RR: 15
Reply 5, posted (13 years 8 months 1 week 3 days 17 hours ago) and read 930 times:

Some early 737-300s had them also.


Pershoyu Spravoyu Litaki!
User currently offlineFlyboy767 From , joined Dec 1969, posts, RR:
Reply 6, posted (13 years 8 months 1 week 3 days 17 hours ago) and read 920 times:

Would they use the HF radio for navigating or communications? Don't they still use HF radio for transmitting coordinates ETA's etc. on trans-atlantic flights?

User currently offlineATCT From United States of America, joined Mar 2001, 2324 posts, RR: 38
Reply 7, posted (13 years 8 months 1 week 3 days 15 hours ago) and read 913 times:

That is an Antanea (spelling? hehe0

ATCT



"The way to get started is to quit talking and begin doing." - Walt Disney
User currently offlineBuff From Australia, joined Mar 2007, 0 posts, RR: 1
Reply 8, posted (13 years 8 months 1 week 3 days 10 hours ago) and read 881 times:

The HF is used for voice communications and SELCAL. I'm not sure if data link capabilities are there, but possibly.

Best Regards,

Buff


User currently offlineTwotterwrench From , joined Dec 1969, posts, RR:
Reply 9, posted (13 years 8 months 1 week 3 days 9 hours ago) and read 863 times:

i am no twidget, but I thought 1 wire = hf antenna but 2 wires= adf sense. I believe the antenna shown in the picture he asks about are sense wires for #1 and #2 adf's.

User currently offlineIainhol From , joined Dec 1969, posts, RR:
Reply 10, posted (13 years 8 months 1 week 3 days 9 hours ago) and read 856 times:

So does this mean I was not wrong?  Smile/happy/getting dizzy
Iain


User currently offlineBuff From Australia, joined Mar 2007, 0 posts, RR: 1
Reply 11, posted (13 years 8 months 1 week 2 days 8 hours ago) and read 826 times:

Pretty sure it's an HF antenna, modified dipole? We have any avionics types here?

Keep in mind the oldest 737 is newer than the newest tube-driven ADF!

Best Regards,

Buff


User currently offlineDesertJets From United States of America, joined Feb 2000, 7801 posts, RR: 16
Reply 12, posted (13 years 8 months 1 week 2 days 7 hours ago) and read 817 times:

While we are on the subject of asking what things are... can anyone explain to me the function of the sucker doors on the engines. I have seen them on early 737-100s and -200s as well as early 747s with the JT9Ds... though they didn't seem to have them for long.


Stop drop and roll will not save you in hell. --- seen on a church marque in rural Virginia
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