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 pound load will only weigh 100 pounds at the point
of attachment on the beam? I like that idea! Seeing as how
the beam in my garage will only support 125 pounds I can
do just that according to all that I have read!
Ed Wolf - ars:N3UE - NA40+TR.PA
http://members.home.net/wolfie132/
http://www.breezeshooters.net
http://www.breezeshooters.com
-----Original Message-----
From: owner-towertalk@contesting.com
[mailto:owner-towertalk@contesting.com]On Behalf Of David Robbins
Sent: Wednesday, June 13, 2001 3:19 PM
To: reflector -tower
Subject: Re: [TowerTalk] Ginpole for 20 foot sections
>
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 explained it as many different ways
as
i can. maybe you should go see a mechanics professor at a local college or
something and figure out how to balance the forces on the pole.
but what you really have to understand for the basic ham case with only a
single
pulley at the top of the gin pole is that the pole has to be able to hold
more
than twice the dead load you are lifting.
--
David Robbins K1TTT
e-mail: mailto://k1ttt@berkshire.net
web: http://www.k1ttt.net
AR-Cluster node: 145.69MHz or telnet://k1ttt.net
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