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11 July 2013, 02:07
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#21
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Member
Country: Canada
Town: British Columbia
Make: Gemini
Length: 4m +
Engine: 40hp 2 str
Join Date: Oct 2003
Posts: 2,151
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For simplicity of keeping the rope and pulleys organized, I'd suggest a fiddle block set.
http://www.pelicanrope.com/safety.pdf (see page 11)
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11 July 2013, 07:47
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#22
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Member
Country: UK - England
Town: Sussex
Boat name: Bombard
Make: Aerotec 380
Length: 3m +
Engine: Mercury Mariner 15hp
Join Date: Jul 2010
Posts: 3,493
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Thanks PT. Andy, great post and very helpful - thanks. I like the Skywinch idea (share your thoughts that it's a windlass in a bracket at the end of the day) but I've got loads of suitable 12mm braided rope and it does look a neat solution in the way that it's just a case of using one handy rope from boat to car (no PITA steel cables) that can can be slotted in at any point and doesn't wind up on a drum.
Not sure what the mechanical advantage or effective effort required is though, do you know how this is calculated for a winch?
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11 July 2013, 08:35
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#23
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Member
Country: UK - England
Town: Southampton
Boat name: SMH Rib / War Shot
Make: Ribtec / Scorpion
Length: 4m +
Engine: 100hp Yam/150hp opt
Join Date: Sep 2003
Posts: 2,069
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Sky winch looks like a simple solution.
Another option would be a self tailing winch from a yacht. Mount on a base plate that can be secured to the LR. Expensive new but often cheap at boat jumbles.
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11 July 2013, 10:12
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#24
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Member
Country: UK - England
Town: Salcombe
Boat name: The Black Pig
Make: Ranieri
Length: 4m +
Engine: 60c hp tohatsu
MMSI: 235038018
Join Date: Jun 2013
Posts: 443
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Wanted good woman
Must be able to cook sew dig worms
Clean fish winch boats
Must have boat and motor.
Please send picture of boat and motor
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11 July 2013, 11:15
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#25
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Member
Country: UK - England
Town: St Helens
Boat name: Wine Down
Make: Maxum
Length: 8m +
Engine: Inboard
Join Date: Apr 2012
Posts: 934
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You dont need a huge capacity winch with the weight you are trying to move.
I like the idea of the Skywinch, but rope of the type suggested by the manufacturer has a huge amount of stretch and you will be winding for a long way before the boat even starts to move.
I would go for the KIS solution in manual mode. I use one of these occasionally, it works well and does what it says on the tin.
bags, tow-ball mounted luggage, boxes, luggage, clam-shell bag, carrier, holiday luggage,waterproof bag
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11 July 2013, 15:08
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#26
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Member
Country: UK - England
Town: Littlehampton, W Sx
Length: no boat
MMSI: 235101591
Join Date: Jan 2012
Posts: 732
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Quote:
Originally Posted by Max...
Not sure what the mechanical advantage or effective effort required is though, do you know how this is calculated for a winch?
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The length of the handle (from the axis of the drum to the grip) divided by the radius of the drum where the rope passes round it.
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"Can ye model it? For if ye can, ye understand it, and if ye canna, ye dinna!" - Lord kelvin
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11 July 2013, 18:00
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#27
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Member
Country: UK - England
Town: Littlehampton, W Sx
Length: no boat
MMSI: 235101591
Join Date: Jan 2012
Posts: 732
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Quote:
Originally Posted by HughN
The length of the handle (from the axis of the drum to the grip) divided by the radius of the drum where the rope passes round it.
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(If there isn't any mechanical reduction gearing involved)
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"Can ye model it? For if ye can, ye understand it, and if ye canna, ye dinna!" - Lord kelvin
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11 July 2013, 19:02
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#28
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Member
Country: UK - England
Town: Sussex
Boat name: Bombard
Make: Aerotec 380
Length: 3m +
Engine: Mercury Mariner 15hp
Join Date: Jul 2010
Posts: 3,493
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Thanks Hugh, much appreciated - what is typical? I don't have any to measure...
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11 July 2013, 19:53
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#29
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Administrator
Country: UK - England
Town: Brighton
Length: 3m +
Join Date: May 2000
Posts: 7,108
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How about one of these?
http://www.frjonesandson.co.uk/produ...winch-pcw3000/
Admittedly not a budget option but would do the job well.
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11 July 2013, 21:16
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#30
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Member
Country: UK - England
Town: yorkshire
Boat name: little vicky
Make: avon ex RNLI
Length: 3m +
Engine: tohatsu
Join Date: Mar 2008
Posts: 2,310
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I just use a standard winch that i bolted to an old large ring spanner that simply hooks over the tow hitch on the car .
Wire is stainless steel plastic coated similar to yacht rigging wire but this stuffs from an old 300 ft radio mast .
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11 July 2013, 21:20
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#31
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Member
Country: UK - England
Town: Sussex
Boat name: Bombard
Make: Aerotec 380
Length: 3m +
Engine: Mercury Mariner 15hp
Join Date: Jul 2010
Posts: 3,493
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Blimey Mart, John's was at one end of the scale but yours is kinda the opposite end...!
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12 July 2013, 07:26
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#32
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Member
Country: UK - England
Town: Littlehampton, W Sx
Length: no boat
MMSI: 235101591
Join Date: Jan 2012
Posts: 732
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Quote:
Originally Posted by Max...
Thanks Hugh, much appreciated - what is typical? I don't have any to measure...
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5:1 or so (at a guess)?
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"Can ye model it? For if ye can, ye understand it, and if ye canna, ye dinna!" - Lord kelvin
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12 July 2013, 09:12
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#33
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Member
Country: Canada
Town: British Columbia
Make: Gemini
Length: 4m +
Engine: 40hp 2 str
Join Date: Oct 2003
Posts: 2,151
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Quote:
Originally Posted by John Kennett
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That looks very interesting! The gas operation and ability to use an unlimited length of rope continuously would extremely useful in the back country.
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12 July 2013, 13:25
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#34
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Member
Country: UK - Scotland
Town: Central Belt of Scotland
Boat name: Puddleduck III
Make: Bombard
Length: 5m +
Engine: 50 HP
Join Date: Mar 2009
Posts: 2,066
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http://www.portablewinch.com/ the Canadian manufacturer of similar if not the same,
I looked at importing them a few years back.
S.
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SPRmarine / SPRtraining
RYA Training Courses & Safety Equipment Sales
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12 July 2013, 14:14
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#35
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Administrator
Country: UK - England
Town: Brighton
Length: 3m +
Join Date: May 2000
Posts: 7,108
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Quote:
Originally Posted by prairie tuber
That looks very interesting! The gas operation and ability to use an unlimited length of rope continuously would extremely useful in the back country.
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I've heard good reports about them and I see one in my horoscope. Just need to find an excuse
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12 July 2013, 14:21
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#36
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Member
Country: Canada
Town: British Columbia
Make: Gemini
Length: 4m +
Engine: 40hp 2 str
Join Date: Oct 2003
Posts: 2,151
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Quote:
Originally Posted by John Kennett
I I see one in my horoscope. Just need to find an excuse
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Moose hunting?
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14 July 2013, 09:12
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#37
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Member
Country: Ireland
Town: ...
Boat name: none
Make: Honwave 3.5-AE
Length: 3m +
Engine: Mariner 6hp
Join Date: Jul 2011
Posts: 119
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Quote:
Also, even with what seem like light loads, never use a tow ball as an anchor point for winches and tow straps. This has caused many deaths.
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Can you elaborate.Why isit so dangerous?
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14 July 2013, 10:49
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#38
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Member
Country: UK - England
Length: 3m +
Join Date: Sep 2008
Posts: 2,767
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Quote:
Originally Posted by billows
Can you elaborate.Why isit so dangerous?
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I think its when the attachment comes off the ball. If you are reliant on a hoop over the ball thats not as secure as the ball fitting on a trailer, AND on a trailer thats known to fail hence has a breakaway cable or secondary chain on unbreaked trailers.
Risk if you are behind the trailer cascading backdown the slipway!
Risk if the winch cable snaps up and hits your face head body. Has the ability to decapitate if you get it 'just right'
Also a risk if a cable snaps but I don't see that matters what the fixing point is.
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14 July 2013, 21:00
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#39
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Member
Country: USA
Town: NorCal
Boat name: SHARKY
Make: AB
Length: 4m +
Engine: Honda BF75 & BF5
Join Date: Dec 2009
Posts: 2,100
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Trailers balls become flying canon balls when broken off, that is the main reason. As others have suggested a tow strap being snapped back can also inflict major injury if it comes off the ball which can happen fairly easily. A Hook is far superior. A continuous load situation is one thing where it is loaded with 500lbs or so. When recovering a vehicle a full throttle launch can produce 20,000 lbs to snatch the stuck vehicle loose, and that is when stuff breaks.
We got away from using steel winch cables on our Jeeps after having one go thru a windshield when it broke. Fortunately it hit the passenger side and the driver was safe. Yes we had a tow strap draped over the cable at the halfway point, and it broke just behind it. Winch rope is far safer as it just drops to the ground.
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14 July 2013, 22:01
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#40
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Administrator
Country: UK - England
Town: Brighton
Length: 3m +
Join Date: May 2000
Posts: 7,108
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I think we're getting slightly carried away here. The OP was about dragging a small inflatable up a beach, not debogging a monster truck!
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