[TowerTalk] Need a Knot Expert
Wes
wes_n7ws at triconet.org
Thu Nov 28 12:10:15 EST 2019
Okay. I guess my thinking was along the lines of my situation. I too have a
horizontal extension on the tower to support my inverted-vee. But my load is
entirely vertical with the apex of the antenna directly under the pulley.
Wes N7WS
On 11/28/2019 9:15 AM, Gedas wrote:
> GM Wes and happy thanksgiving !
>
> Surprisingly when the rope (knot portion with antenna) is hoisted up and the
> antenna pulled tight that still tightens up those vertical ropes. Do you
> remember that problem we were all given in college to calculate the tension in
> a rope if you pulled on it in the middle perpendicular to that rope? Even
> though that perpendicular pull is WAY WAY off on one end it still seems to
> pull it out and away from the tower almost a foot stretching the entire
> vertical ropes.
>
> Probably did a poor job explaining that but in the end the tension in those
> vertical ropes does increase when the "dipole" is made nice and tight and 30
> or so pounds of tension is applied. Add to that some wind or 1/2" of ice and
> that 30 pounds seems to turn into several hundred pounds of tangential pull.
>
> Gedas, W8BYA
More information about the TowerTalk
mailing list