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<p>Think of the extra wraps as increasing the diameter of the drum.
<br>
</p>
<p>Then think of the drum as a wrench handle. The longer the handle
the more torque you can put on the bolt.</p>
<p>Now think of it in reverse, the drum is the bolt and can only
apply X amount of torque. If the drum is small it can put more
force on the end of the wrench then if the wrench is long.</p>
<p>Basically it is leverage from the point of view of the drum
(center of rotation).</p>
<p>However, as the cable increases the size of the drum and the rpm
of the drum is constant, the line speed of the cable increase
because it has to wrap more cable onto the drum with each
rotation.</p>
<p><br>
</p>
<p><br>
</p>
<div class="moz-cite-prefix">On 4/20/24 19:20, Dean Vinson wrote:<br>
</div>
<blockquote type="cite"
cite="mid:001b01da9381$bf5da2e0$3e18e8a0$@vinsonfarm.net">
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<div class="WordSection1">
<p class="MsoNormal">Gents, what’s the physics behind the
capacity reductions with successive wraps of the cable?
Larger diameter spool = longer moment arm = takes fewer pounds
to reach the rated torque?<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Dean Vinson<o:p></o:p></p>
<p class="MsoNormal">Saint Paris, Ohio<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<div>
<div
style="border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in 0in 0in">
<p class="MsoNormal"><b>From:</b> AT
<a class="moz-txt-link-rfc2396E" href="mailto:at-bounces@lists.antique-tractor.com"><at-bounces@lists.antique-tractor.com></a> <b>On Behalf
Of </b>Dean VP<br>
<b>Sent:</b> Saturday, April 20, 2024 6:09 PM<br>
<b>To:</b> Antique Tractor Email Discussion Group
<a class="moz-txt-link-rfc2396E" href="mailto:at@lists.antique-tractor.com"><at@lists.antique-tractor.com></a><br>
<b>Subject:</b> Re: [AT] 12,000 lb winches<o:p></o:p></p>
</div>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
<div>
<div>
<p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Helvetica",sans-serif">Yup.
I don't know how many feet are on each wrap or how many
wraps there are yet but my guess with an 80' plus cable
the first wrap is probably un wrapped in less than 20'.
Looping back 20' gains more in pulling power than is
lost in the wraps on the winch. On a straight pull back
one could add an additional extension cable to keep the
wraps on the winch but it is kind of a hassle to
disconnect the extension rope and connect direct. Makes
sense if one is pulling something out of a mess of in
the distance but not sure if it makes much sense of the
tractor can be backed up to the back of the 20' trailer.<o:p></o:p></span></p>
</div>
<div>
<p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Helvetica",sans-serif"><o:p> </o:p></span></p>
</div>
</div>
<div id="ydp489be855yahoo_quoted_3796662236">
<div>
<div>
<p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Helvetica",sans-serif;color:#26282A">On
Saturday, April 20, 2024 at 02:39:42 PM PDT, <<a
href="mailto:rdhaskell@juno.com"
moz-do-not-send="true" class="moz-txt-link-freetext">rdhaskell@juno.com</a>>
wrote: <o:p></o:p></span></p>
</div>
<div>
<p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Helvetica",sans-serif;color:#26282A"><o:p> </o:p></span></p>
</div>
<div>
<p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Helvetica",sans-serif;color:#26282A"><o:p> </o:p></span></p>
</div>
<div>
<div id="ydp489be855yiv4558562048">
<div>
<div>
<p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Helvetica",sans-serif;color:#26282A">Or
shorten the cable.<o:p></o:p></span></p>
</div>
<div>
<p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Helvetica",sans-serif;color:#26282A"> <o:p></o:p></span></p>
</div>
<div id="ydp489be855yiv4558562048yqt50282">
<div>
<p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Helvetica",sans-serif;color:#26282A">On
Sat, 20 Apr 2024 21:26:46 +0000 (UTC) Dean VP
<<a href="mailto:deanvp@att.net"
target="_blank" moz-do-not-send="true"
class="moz-txt-link-freetext">deanvp@att.net</a>>
writes:<o:p></o:p></span></p>
</div>
<blockquote
style="border:none;border-left:solid black 1.5pt;padding:0in 0in 0in 8.0pt;margin-left:7.5pt;margin-top:5.0pt;margin-bottom:5.0pt">
<div>
<div>
<p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Helvetica",sans-serif;color:#26282A">Ron,<o:p></o:p></span></p>
</div>
<div>
<p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Helvetica",sans-serif;color:#26282A"><o:p> </o:p></span></p>
</div>
<div>
<p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Helvetica",sans-serif;color:#26282A">All
the more reason to buy a winch with excess
capacity.<o:p></o:p></span></p>
</div>
<div>
<p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Helvetica",sans-serif;color:#26282A"><o:p> </o:p></span></p>
</div>
</div>
<div
id="ydp489be855yiv4558562048ydpeaf415f6yahoo_quoted_4125219700">
<div>
<div>
<p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Helvetica",sans-serif;color:#26282A">On
Saturday, April 20, 2024 at 01:49:03 PM
PDT, <<a
href="mailto:rdhaskell@juno.com"
moz-do-not-send="true"
class="moz-txt-link-freetext">rdhaskell@juno.com</a>>
wrote: <o:p></o:p></span></p>
</div>
<div>
<p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Helvetica",sans-serif;color:#26282A"><o:p> </o:p></span></p>
</div>
<div>
<p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Helvetica",sans-serif;color:#26282A"><o:p> </o:p></span></p>
</div>
<div>
<div>
<p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Helvetica",sans-serif;color:#26282A">Remember
the 12,000 rating is on the first wrap
of the cable, once you<o:p></o:p></span></p>
</div>
<div>
<p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Helvetica",sans-serif;color:#26282A">start
the second wrap deduct 10%. Another
10% on the third, and 10% more<o:p></o:p></span></p>
</div>
<div>
<p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Helvetica",sans-serif;color:#26282A">on
the fourth.<o:p></o:p></span></p>
</div>
<div>
<p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Helvetica",sans-serif;color:#26282A"><o:p> </o:p></span></p>
</div>
<div>
<p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Helvetica",sans-serif;color:#26282A">Ron
Haskell<o:p></o:p></span></p>
</div>
<div>
<p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Helvetica",sans-serif;color:#26282A">Riverside
CA<o:p></o:p></span></p>
</div>
<div>
<p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Helvetica",sans-serif;color:#26282A">USA<o:p></o:p></span></p>
</div>
<div>
<p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Helvetica",sans-serif;color:#26282A"><o:p> </o:p></span></p>
</div>
<div>
<p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Helvetica",sans-serif;color:#26282A">_______________________________________________<o:p></o:p></span></p>
</div>
<div>
<p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Helvetica",sans-serif;color:#26282A">AT
mailing list<o:p></o:p></span></p>
</div>
<div>
<p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Helvetica",sans-serif;color:#26282A"><a
href="mailto:AT@lists.antique-tractor.com" target="_blank"
moz-do-not-send="true"
class="moz-txt-link-freetext">AT@lists.antique-tractor.com</a><o:p></o:p></span></p>
</div>
<div>
<p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Helvetica",sans-serif;color:#26282A"><a
href="http://lists.antique-tractor.com/listinfo.cgi/at-antique-tractor.com"
target="_blank"
moz-do-not-send="true"
class="moz-txt-link-freetext">http://lists.antique-tractor.com/listinfo.cgi/at-antique-tractor.com</a><o:p></o:p></span></p>
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<div>
<p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Helvetica",sans-serif;color:#26282A"> <o:p></o:p></span></p>
</div>
</blockquote>
</div>
<p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Helvetica",sans-serif;color:#26282A"><br>
Ron Haskell<br>
Riverside CA<br>
USA<o:p></o:p></span></p>
</div>
</div>
<div id="ydp489be855yqt49444">
<p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Helvetica",sans-serif;color:#26282A">_______________________________________________<br>
AT mailing list<br>
<a href="mailto:AT@lists.antique-tractor.com"
target="_blank" moz-do-not-send="true"
class="moz-txt-link-freetext">AT@lists.antique-tractor.com</a><br>
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<br>
<fieldset class="moz-mime-attachment-header"></fieldset>
<pre class="moz-quote-pre" wrap="">_______________________________________________
AT mailing list
<a class="moz-txt-link-abbreviated" href="mailto:AT@lists.antique-tractor.com">AT@lists.antique-tractor.com</a>
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</pre>
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