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## [TowerTalk] Ginpole for 20 foot sections

 To: [TowerTalk] Ginpole for 20 foot sections w7ni@easystreet.com (Stan or Patricia Griffiths) Wed, 13 Jun 2001 11:48:12 -0700
 ```Another non-believer who obviously has not tried the experiment and made the measurements. Stan w7ni@easystreet.com n4kg@juno.com wrote: > The pulley at the top of a gin pole merely changes > the direction of the rope. Please explain how a > block and tackle "Magically" reduces the force on > the rope to the top pulley and how to install the > block and tackle to achieve this magical reduction. > > One more point. One pulley can give a 2:1 mechanical > advantage if one end of the rope is attached to a FIXED > support. If both ends of the rope are moving, there is > NO mechanical advantage, only a direction change > plus loss due to friction. > > de Tom N4KG > > On 13 Jun 2001 Mike Gilmer - N2MG writes: > > Steve, you are "half" right. > > > > The lift effort is part of the overall load on the > > ginpole (everyone forgets this), so without any > > mechanical advantage there is 2X load weight applied > > to the ginpole. If you employ a 3:1 advantage, and > > thereby reduce the lift force needed, you decrease the > > overall force on the ginpole. > > > > 73 Mike N2MG > > > > On Wed, 13 June 2001, K7LXC@aol.com wrote: > > > > > In a message dated 6/12/01 11:45:50 PM Pacific Daylight Time, > > > w7ni@easystreet.com writes: > > > > > > > A 3:1 mechanical advantage block and tackle system does, > > indeed, relieve > > > > about 1/3 of the load on the gin pole, in addition to reducing > > the number > > > of > > > > bodies required on the pull rope. > > > > > > 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 stays the same. > > You still > > > need a suitable ginpole. > > > > > > Cheers, Steve K7LXC > > > Tower Tech > > > > ________________________________________________ > > PeoplePC: It's for people. And it's just smart. > > http://www.peoplepc.com > > > > List Sponsor: Are you thinking about installing a tower this summer? > > Call us > > for information on our fabulous Trylon Titan self-supporting towers > > - up to > > 96-feet for less than \$2000! at 888-833-3104 > HREF="http://www.ChampionRadio.com";> > > www.ChampionRadio.com > > > > ----- > > FAQ on WWW: http://www.contesting.com/FAQ/towertalk > > Submissions: towertalk@contesting.com > > Administrative requests: towertalk-REQUEST@contesting.com > > Problems: owner-towertalk@contesting.com > > > > ________________________________________________________________ > GET INTERNET ACCESS FROM JUNO! > Juno offers FREE or PREMIUM Internet access for less! > Join Juno today! For your FREE software, visit: > http://dl.www.juno.com/get/tagj. > > List Sponsor: Are you thinking about installing a tower this summer? Call us > for information on our fabulous Trylon Titan self-supporting towers - up to > 96-feet for less than \$2000! at 888-833-3104 HREF="http://www.ChampionRadio.com";> > www.ChampionRadio.com > > ----- > FAQ on WWW: http://www.contesting.com/FAQ/towertalk > Submissions: towertalk@contesting.com > Administrative requests: towertalk-REQUEST@contesting.com > Problems: owner-towertalk@contesting.com List Sponsor: Are you thinking about installing a tower this summer? Call us for information on our fabulous Trylon Titan self-supporting towers - up to 96-feet for less than \$2000! at 888-833-3104 www.ChampionRadio.com ----- FAQ on WWW: http://www.contesting.com/FAQ/towertalk Submissions: towertalk@contesting.com Administrative requests: towertalk-REQUEST@contesting.com Problems: owner-towertalk@contesting.com ```
 Current Thread [TowerTalk] Ginpole for 20 foot sections, (continued) [TowerTalk] Ginpole for 20 foot sections, Earl Bailley [TowerTalk] Ginpole for 20 foot sections, Kim Bottles [TowerTalk] Ginpole for 20 foot sections, Guy Olinger, K2AV [TowerTalk] Ginpole for 20 foot sections, Mike Gilmer - N2MG [TowerTalk] Ginpole for 20 foot sections, Ward Silver [TowerTalk] Ginpole for 20 foot sections, Bob Nielsen [TowerTalk] Ginpole for 20 foot sections, Guy Olinger, K2AV [TowerTalk] Ginpole for 20 foot sections, n4kg@juno.com [TowerTalk] Ginpole for 20 foot sections, David Robbins [TowerTalk] Ginpole for 20 foot sections, Gary McDuffie, Sr. [TowerTalk] Ginpole for 20 foot sections, Stan or Patricia Griffiths <= [TowerTalk] Ginpole for 20 foot sections, n4kg@juno.com [TowerTalk] Ginpole for 20 foot sections, Stan or Patricia Griffiths [TowerTalk] Ginpole for 20 foot sections, Guy Olinger, K2AV [TowerTalk] Ginpole for 20 foot sections, David Robbins [TowerTalk] Ginpole for 20 foot sections, Mel Farrer [TowerTalk] Ginpole for 20 foot sections, Mike Gilmer - N2MG [TowerTalk] Ginpole for 20 foot sections, Guy Olinger, K2AV [TowerTalk] Ginpole for 20 foot sections, n4kg@juno.com [TowerTalk] Ginpole for 20 foot sections, Stan or Patricia Griffiths [TowerTalk] Ginpole for 20 foot sections, Mike Gilmer - N2MG