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1. [TowerTalk] Antenna surface area (score: 1): Author: wa2moe@doitnow.com (Stu Greene); Date: Sat, 09 Jun 2001 18:42:58 -0700; Shouldn't the calculation be L X (Diameter X pi) ? Or length times circumference? And this doesn't reflect tapering of the elements. List Sponsor: Are you thinking about installing a tower this summe; /archives//html/Towertalk/2001-06/msg00159.html (8,447 bytes)
2. [TowerTalk] Antenna surface area (score: 1): Author: n3rr@erols.com (Bill Hider); Date: Sun, 10 Jun 2001 02:13:08 +0100; The formula Gene proposed is not exactly correct, nor does he precisely state what to do with the taper. Regarding the formula, Gene's thinking is: If you think of the wind as hitting the tube broads; /archives//html/Towertalk/2001-06/msg00160.html (11,560 bytes)
3. [TowerTalk] Antenna surface area (score: 1): Author: w5kp@swbell.net (J. Kincade); Date: Sat, 09 Jun 2001 21:11:23 -0500; Especially it doesn't account for the semi-extreme tapering to a pencil point on F12's! 73, Jerry us to HREF="http://www.ChampionRadio.com"> List Sponsor: Are you thinking about installing a tower th; /archives//html/Towertalk/2001-06/msg00161.html (10,032 bytes)
4. [TowerTalk] Antenna surface area (score: 1): Author: wa2moe@doitnow.com (Stu Greene); Date: Sat, 09 Jun 2001 19:50:29 -0700; Following your reasoning, would A = 1/2 [L X (pi X D)] be close enough? That does not account for taper, but it is half the circumference of the element times its length. You added Bill, irrespective; /archives//html/Towertalk/2001-06/msg00165.html (9,732 bytes)
5. [TowerTalk] Antenna surface area (score: 1): Author: Michael Tope" <W4EF@dellroy.com (Michael Tope); Date: Sat, 9 Jun 2001 19:31:51 -0700; Bill, Gene specifically said that he was calculating projected area without any shape factors. The projected surface area at right angles to a cylindrical tube is simply diameter x length. The effect; /archives//html/Towertalk/2001-06/msg00166.html (14,239 bytes)
6. [TowerTalk] Antenna surface area (score: 1): Author: n3rr@erols.com (Bill Hider); Date: Sun, 10 Jun 2001 03:11:48 +0100; No Stu, it wouldn't be precise. It would be the integral, as I stated. Your formula would result in a surface area exposed to the wind much larger than even Gene's calculation (especially, if his is; /archives//html/Towertalk/2001-06/msg00167.html (12,064 bytes)
7. [TowerTalk] Antenna surface area (score: 1): Author: SPELUNK.SUENO@prodigy.net (EUGENE SMAR); Date: Sat, 9 Jun 2001 23:07:22 -0400; Stu: The area to which I refer is the area of the cylindrical shape of a tubular element/boom as seen in shadow behind the element/boom. This is the area used in all wind force studies I've read over; /archives//html/Towertalk/2001-06/msg00168.html (9,813 bytes)
8. [TowerTalk] Antenna surface area (score: 1): Author: n3rr@erols.com (Bill Hider); Date: Sun, 10 Jun 2001 03:16:01 +0100; Hummm, I did not see that in his posting. 0.6 is the multiple for the approximation of the integral I proposed in my posting. Bill, N3RR shape is simply coefficient the effective projected flat "Stu; /archives//html/Towertalk/2001-06/msg00169.html (16,377 bytes)
9. [TowerTalk] Antenna surface area (score: 1): Author: SPELUNK.SUENO@prodigy.net (EUGENE SMAR); Date: Sat, 9 Jun 2001 23:48:28 -0400; Bill: My comments are below. Dick Weber K5IU's papers on the subject includes equations for calculating force of the wind on tubular elements and booms, all of which start with the calculation I desc; /archives//html/Towertalk/2001-06/msg00170.html (14,166 bytes)
10. [TowerTalk] Antenna surface area (score: 1): Author: SPELUNK.SUENO@prodigy.net (EUGENE SMAR); Date: Sun, 10 Jun 2001 00:11:36 -0400; Mike, Bill, et al: Hold everything! Multiplying by 0.6 or 0.67 as a shape factor is NOT the correct number. It's 1.2 - at least according to Mechanical Engineering in Radar and Communications, one of; /archives//html/Towertalk/2001-06/msg00172.html (15,056 bytes)
11. [TowerTalk] Antenna surface area (score: 1): Author: alsopb@gloryroad.net (alsopb); Date: Sun, 10 Jun 2001 11:01:58 +0000; It appears that mother nature knows all about the calculation of wind force. She knows that arrays have an effective surface area less than the sum of the areas of the individual elements. Another wa; /archives//html/Towertalk/2001-06/msg00174.html (13,475 bytes)
12. [TowerTalk] Antenna surface area (score: 1): Author: kg2au@stny.rr.com (Jimmy Weierich); Date: Sun, 10 Jun 2001 10:23:12 -0400; Studies have shown that this is, indeed, a lower energy use configuration! But it's not a question of reduced drag, as in the bicycle racer situation, but something else entirely. Each goose flies in; /archives//html/Towertalk/2001-06/msg00175.html (10,253 bytes)
13. [TowerTalk] Antenna surface area (score: 1): Author: wa9als@starband.net (WA9ALS - John); Date: Sun, 10 Jun 2001 09:11:58 -0500; Although it might be desirable to "fly with eagles", and you can save gasoline by backdrafting behind a semi, I can't advise backdrafting behind the lead goose. (Geese know this!) sri On a serious n; /archives//html/Towertalk/2001-06/msg00176.html (9,981 bytes)
14. [TowerTalk] Antenna surface area (score: 1): Author: n4zr@contesting.com (Pete Smith); Date: Sun, 10 Jun 2001 11:17:28 -0400; Agreed, but antenna manufacturers have a marketing interest in keeping their numbers generous ("Sure, that'll go on your tower"), while tower and rotator manufacturers have an interest in using the m; /archives//html/Towertalk/2001-06/msg00178.html (10,446 bytes)
15. [TowerTalk] Antenna surface area (score: 1): Author: tao@skypoint.com (Tod - Minnesota); Date: Sun, 10 Jun 2001 10:33:21 -0500; Wasn't the original purpose of this discussion to allow someone to put together a tower and antenna system that would neither blow over in the wind nor be 'crushed' under its own over-designed weight; /archives//html/Towertalk/2001-06/msg00179.html (9,987 bytes)
16. [TowerTalk] Antenna surface area (score: 1): Author: SPELUNK.SUENO@prodigy.net (EUGENE SMAR); Date: Sun, 10 Jun 2001 12:53:02 -0400; I take it that no one finds my suggestion of collecting physical measurements of antenna components of value. Oh, well,... back to the hole in my yard! 73 de Gene Smar AD3F --Original Message-- From:; /archives//html/Towertalk/2001-06/msg00181.html (10,137 bytes)
17. [TowerTalk] Antenna surface area (score: 1): Author: kr7x@gte.net (Hank Lonbeg); Date: Sun, 10 Jun 2001 10:11:20 -0700; Time Out everyone: All this talk about integrating and double integrals has given me a head ache. As defined in the Building Code I know the most about ( the UBC), the surface area exposed to the win; /archives//html/Towertalk/2001-06/msg00182.html (13,329 bytes)
18. [TowerTalk] Antenna surface area (score: 1): Author: w5kp@swbell.net (J. Kincade); Date: Sun, 10 Jun 2001 12:13:35 -0500; I must respectfully disagree, John. I've seen them lie like a rug for years, with the sole exception of Force 12. It comes from their being driven by their sales and marketing departments, combined w; /archives//html/Towertalk/2001-06/msg00183.html (10,443 bytes)
19. [TowerTalk] Antenna surface area (score: 1): Author: tao@skypoint.com (Tod - Minnesota); Date: Sun, 10 Jun 2001 13:21:03 -0500; Hank is bringing us back to reality here with these six practical statements-- (1). For a flat plate of W width and L length with the W dimension normal to the wind the projected area is the width W; /archives//html/Towertalk/2001-06/msg00184.html (10,442 bytes)
20. [TowerTalk] Antenna surface area (score: 1): Author: wa2moe@doitnow.com (Stu Greene); Date: Sun, 10 Jun 2001 13:15:38 -0700; I regret (1) having thought about the question and (2) expressing my views. Each posting has been read and considered and then, even more confused, I ran a Google search on the question >surface area; /archives//html/Towertalk/2001-06/msg00190.html (8,383 bytes)

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