Author: Michael Tope" <W4EF@dellroy.com (Michael Tope)
Date: Wed, 13 Jun 2001 12:01:18 -0700
Hi all, The gin pole feels a downward force equal to twice the attached load. Thus the person pulling the rope has a 2:1 advantage in terms of his or her ability to push the tower down into the groun
To: <towertalk@contesting.com> If you put a tension guage on the tie off line, you would find that the tension is essentially equal to the load divided by whatever advantage exists in the tackle sys
The down force is subtracted from the weight of the tree and still applied as down force to hold the load. The down force of the tree to the ground decreases by the same amount that is transferred to
Author: w7ni@easystreet.com (Stan or Patricia Griffiths)
Date: Wed, 13 Jun 2001 11:58:01 -0700
Well, if I wanted a 2:1 mechanical advantage on my gin pole and the reduction in gin pole load it provides, this is EXACTLY how I would configure my gin pole. Stan w7ni@easystreet.com List Sponsor: A
its the same as if someone was holding it, you still have that downward force exerted to keep the load where it was. one basic misconception is that a force being applied doesn't mean that anything i
Guys, There is a very simple way to figure the mechanical advantage without any understanding for forces et al. With the rope/pully arrangement in place: 1) Move the rope you pull on, say 5 feet. 2)
<< You sure? Isn't a hundred-pound load going to weigh 100 pounds no matter how the block and tackle are set up? The load effort on the end of the rope will be reduced but the dead weight of the load
WRONG! the higher the mechanical advantage of the block and tackle the lower the load on what is holding it up(diregarding the weight of the tackle itself). i'm sorry if you just don't get it, i've e
My turn... Let me see if I now, after the past few days, understand. If I use a block and tackle with a 5:1 mechanical advantage attached to a beam in my garage to lift a 500 pound load, the 500 poun
Thanks for remembering that classic, Ward. I have a copy of it around somewhere, but won't show it to my XYL until AFTER I get a tower and antenna installed! If we start including friction, then we a
when lifting a dead load with a single pulley you would have the 500lbs of weight plus 500 pounds of downforce for a total of 1000 lbs. With a 5:1 advantage you now have 500 lbs of dead weight plus 1
Nope. It "weighs" only 100# at your end (the end you pull on). The beam still has to support the entire weight of the load, plus the pull force. 73 Mike N2MG _________________________________________
I agree with this scenario which is an example of my statement that the mechanical advantage equals the number of segments between the support and the load. A gin pole for heavy loads can be configur
As nicely stated by N2MG, the gin pole "has to support the entire weight of the load, plus the pull force." For a standard gin pole, with only one pulley at the top, lifting a 300 pound load, the gin
Author: w7ni@easystreet.com (Stan or Patricia Griffiths)
Date: Wed, 13 Jun 2001 12:37:34 -0700
Well, Tom . . . you are STILL a nonbeliever and you STILL have not tried the experiment and you STILL have not made the measurements, obviously. And you are STILL very WRONG about this concept. Its O
Author: Michael Tope" <W4EF@dellroy.com (Michael Tope)
Date: Thu, 14 Jun 2001 05:13:54 -0700
Same thing, Jim. Imagine that the tower is sitting in soft ground and starts to sink under the load suspended from the gin pole. With the configuration you describe (pull rope tied to a tree), the lo
Hi Tom and all, Remember, when evaluating the true effect of the "reduced load" on the ginpole, that if the load is not directly below the pole, but creates a small angle between the line and the po
Ron, Your point is valid ONLY if the block and tackle is between the support and the load. If the block and tackle is between the puller and the gin pole rope, the tension in the puller's rope is red
I don't recall reading anything in which the author advocated arranging the mechanical advantage between the worker and the ginpole. I don't see why anyone would *want* to set it up this way - the wo
Where is the advantage for the gin pole??????? If the section weighs a hundred pounds, I don't care how many pulleys you use there is still a hundred pounds on the gin pole.......... It will take les