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 Winching: dumb physics Q
#250943
04/08/03 12:54 AM
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Joined: Jan 2000
Posts: 807
OP
Rock Warrior
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OK, I admit it, I can't recallàdo you gain more w/ 2 pulleys (winch to pulley on anchor to pulley on bumper to anchor) than just a double line w/ 1 pulley (winch to pulley on anchor to bumper)? I must be going brain dead, as I recall that physics dictates you go w/ a third pulley to get a true triple line and the additional multiplication of the winch's capacity (ie, winch to pulley on anchor to pulley on bumper, to second pulley on anchor, to bumper). To that end, I recall the gain for double lining but does anyone recall what it is for the above more complex systems? Thanks! s <img border="0" title="" alt="[Confused]" src="images/icons/confused.gif" />
'89 T2, TLo, 3.4L, 2ARBs, 5.38s, 35 MTR's, snorkel by Ace Hardware, spare lollipops for li'l wheelers, anti-aero by devo-lution?and no diet in sight.
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 Re: Winching: dumb physics Q
#250944
04/08/03 01:33 AM
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Joined: Aug 2002
Posts: 3,007
Roll Me Over
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The more pulleys that are used, the more weight the same force can pull. So, with the right amount of pulleys, a 2000lb winch can out pull a 10,000lb winch without pulleys. Simple physics. The more pulleys, the easier it is.
Richard
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Re: Winching: dumb physics Q
#250945
04/08/03 02:07 AM
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Joined: Aug 2000
Posts: 4,868
Roll Me Over
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To answer your question specifically rather than just repeating your question in another way, the force required to move the load is divided by the number of lines supporting the load. So in the case of your question, the winch needs to exert 1/3 the force that would be necessary with a straight pull.
Likewise, the winch will need to move 3 times the length of line to move the load a specified distance than it would with a straight pull.
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Re: Winching: dumb physics Q
#250946
04/09/03 05:38 AM
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Joined: Jan 2000
Posts: 807
OP
Rock Warrior
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<img border="0" alt="[Hillbilly]" title="" src="graemlins/notooth.gif" /> I knew I could count on you guys to help a physicsally challenged dolt like me! <img border="0" alt="[Nerd]" title="" src="graemlins/nerd.gif" /> s <img border="0" alt="[Pig]" title="" src="graemlins/oink.gif" />
'89 T2, TLo, 3.4L, 2ARBs, 5.38s, 35 MTR's, snorkel by Ace Hardware, spare lollipops for li'l wheelers, anti-aero by devo-lution?and no diet in sight.
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Re: Winching: dumb physics Q
#250947
04/08/03 08:22 PM
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Joined: Jan 2000
Posts: 1,656
Body Damage is Cool
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take a "quick" peak here: http://www.rightcoastcrawler.com/billavista/Recovery/Recovery.htm <img border="0" title="" alt="[Razz]" src="images/icons/tongue.gif" /> <img border="0" title="" alt="[Razz]" src="images/icons/tongue.gif" /> <img border="0" title="" alt="[Razz]" src="images/icons/tongue.gif" /> <img border="0" alt="[Pirate]" title="" src="graemlins/bppirate.gif" /> <img border="0" alt="[Pirate]" title="" src="graemlins/bppirate.gif" /> <small>[ April 09, 2003, 04:11 PM: Message edited by: matthew ]</small>
'93 RS 3.2L - DD/trail build '97 7.3L Powerstroke - tow rig '71 FJ40 - V-8, nv4500, atlas, D60, 14B - current build Owner: http://www.INDEPENDENT4x.comm-f 9am-6pm EST. 804-550-0480
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Re: Winching: dumb physics Q
#250948
04/08/03 10:28 PM
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Joined: Dec 1999
Posts: 1,214
Body Damage is Cool
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Jeff Mason
Whatever makes you upset in someone else...also exists in you
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Re: Winching: dumb physics Q
#250949
04/09/03 06:09 PM
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Joined: Jan 2000
Posts: 807
OP
Rock Warrior
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Now THAT is an informative pg. <img border="0" title="" alt="[Eek!]" src="images/icons/shocked.gif" />
s
'89 T2, TLo, 3.4L, 2ARBs, 5.38s, 35 MTR's, snorkel by Ace Hardware, spare lollipops for li'l wheelers, anti-aero by devo-lution?and no diet in sight.
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Re: Winching: dumb physics Q
#250950
04/09/03 09:10 PM
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Joined: Jan 2000
Posts: 1,656
Body Damage is Cool
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SORRY BOUT THE BOGUS LINK..... <img border="0" title="" alt="[Confused]" src="images/icons/confused.gif" /> ....fixed it huh....that's weird.......computers <img border="0" title="" alt="[Roll Eyes]" src="images/icons/rolleyes.gif" /> <small>[ April 09, 2003, 04:12 PM: Message edited by: matthew ]</small>
'93 RS 3.2L - DD/trail build '97 7.3L Powerstroke - tow rig '71 FJ40 - V-8, nv4500, atlas, D60, 14B - current build Owner: http://www.INDEPENDENT4x.comm-f 9am-6pm EST. 804-550-0480
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Re: Winching: dumb physics Q
#250951
04/09/03 11:31 PM
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Joined: Jul 2000
Posts: 1,783
Body Damage is Cool
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I was looking at the page on pirate and it got me thinking. Is the cable better or worse in your opinion to the rope types that are out there?
Troy
94 Rodeo sas'd front dana 44(coil sprung), dual transfer cases (isuzu), tera lows, custom bumpers, winch, arb lockers[url= [url=http://community.webshots.com/user/94rodeo] [url=http://community.webshots.com/user/94rodeo[/url] http://community.webshots.com/user/94rodeo[/url]
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Re: Winching: dumb physics Q
#250952
04/10/03 06:23 AM
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Joined: Aug 1999
Posts: 9,030
4x4Wire.com Managing Editor Emeritus
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Rope is way better, IMHO, in every aspect except cost... and IMHO, the peace of mind and ease of use far outweighs the added expense.
Randii
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