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## [TowerTalk] Elementary question - trig formula

 To: [TowerTalk] Elementary question - trig formula n3rr@erols.com (Bill Hider, N3RR) Fri, 26 Jun 1998 02:45:58 +0100
 ```Not only is it easier, making scaled drawings of your site is usually required for building permits. So, I use those drawings in the implementation of my station. The scaled drawings take any guess work out of the picture. As I contemplate buying/building new antennas, I place little "shrimpboats" (as I call them) on the scaled drawings to see if whatever I'm contemplating will fit. All this in the theme of: "It's easier to simulate/test it on the ground before it goes on the tower." Bill, N3RR T A RUSSELL wrote: > There is an even easier way that requires NO MATH ! > > Just make a scaled drawing, say 1 inch = 10 ft. > > Then you can measure your guy wire lengths and/or > turning radius at any point on the tower. > > See, I told you it was simple. > > de Tom N4KG > ............................ > > On Thu, 25 Jun 1998 15:12:36 -0400 Pete Smith > writes: > > > >At the risk of getting into the dumb question territory: > > > >If you know how far from the base of your tower your guys attach (on > >flat > >ground), and you know how high they attach to the tower, then you > >should be > >able readily to calculate how much turning radius inside the guys > >would > >exist at any given height on the tower. Obviously, this would be > >useful > >for assessing a potential stack design. > > I > > /I > > / I > > / I C > > / I > > /----I > > / ? I > > / I D > > / I > > -----/----B---I--------- > > > >That is, if you know the lengths of B and C+D, then you ought to be > >able to > >figure out what "?" is for any length of C. > > > >Unfortunately, I've forgotten virtually all the plane geometry and > >trig > >formulas I ever learned, and I didn't keep any high school math books. > > I > >think the two triangles involved are called "similar triangles," but > >that's > >as far as my memory goes. Can anyone tell me offhand what the right > >formula is for this? Once I have the fomula I can do the > >calculations, but > >what to calculate? > > > >Thanks! > > > > > > > > > >73, Pete Smith N4ZR > >In wild, wonderful, fairly rare WEST Virginia > > > >-- > >FAQ on WWW: http://www.contesting.com/towertalkfaq.html > >Submissions: towertalk@contesting.com > >Administrative requests: towertalk-REQUEST@contesting.com > >Problems: owner-towertalk@contesting.com > >Search: http://www.contesting.com/km9p/search.htm > > > > > > _____________________________________________________________________ > You don't need to buy Internet access to use free Internet e-mail. > Get completely free e-mail from Juno at http://www.juno.com > Or call Juno at (800) 654-JUNO [654-5866] > > -- > FAQ on WWW: http://www.contesting.com/towertalkfaq.html > Submissions: towertalk@contesting.com > Administrative requests: towertalk-REQUEST@contesting.com > Problems: owner-towertalk@contesting.com > Search: http://www.contesting.com/km9p/search.htm -- FAQ on WWW: http://www.contesting.com/towertalkfaq.html Submissions: towertalk@contesting.com Administrative requests: towertalk-REQUEST@contesting.com Problems: owner-towertalk@contesting.com Search: http://www.contesting.com/km9p/search.htm ```
 Current Thread [TowerTalk] Elementary question - trig formula, Pete Smith [TowerTalk] Elementary question - trig formula, Bill Aycock [TowerTalk] Elementary question - trig formula, WE9V Chad Kurszewski [TowerTalk] Elementary question - trig formula, Bill Hider [TowerTalk] Elementary question - trig formula, Chuck Lewis [TowerTalk] Elementary question - trig formula, Thomas Johnson [TowerTalk] Elementary question - trig formula, Chuck Lewis [TowerTalk] Elementary question - trig formula, Fred Hopengarten [TowerTalk] Elementary question - trig formula, T A RUSSELL [TowerTalk] Elementary question - trig formula, Bill Hider, N3RR <= [TowerTalk] Elementary question - trig formula, Al Samson