[TowerTalk] Ginpole for 20 foot sections

[Stan or Patricia Griffiths]

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 <n2mg@contesting.com> 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 <A
> > HREF="http://www.ChampionRadio.com">
> > www.ChampionRadio.com</A>
> >
> > -----
> > 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 <A HREF="http://www.ChampionRadio.com">
> www.ChampionRadio.com</A>
>
> -----
> 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 <A HREF="http://www.ChampionRadio.com">
www.ChampionRadio.com</A>

-----
FAQ on WWW:               http://www.contesting.com/FAQ/towertalk
Submissions:              towertalk@contesting.com
Administrative requests:  towertalk-REQUEST@contesting.com
Problems:                 owner-towertalk@contesting.com