Page 5 of 6 FirstFirst ... 3456 LastLast
Results 41 to 50 of 51

Thread: portable electric winches

  1. #41
    Join Date
    Jul 2011
    Location
    Yarrawonga, Vic
    Posts
    6,568
    Total Downloaded
    0
    Quote Originally Posted by isuzutoo-eh View Post
    Mechanical Advantage is the force applied to the load, divided by the force applied to the apparatus.
    In a simple lever, pulley or geared system, it is the inverse of the:
    Velocity Ratio (VR) is the distance the load moves divided by the distance the effort moves.

    (The majority of pulley diagrams I have found don't show the free end of the rope anchored back to the effort (winch) as in a double line pull, perhaps because it seems counter-intuitive to be pulling a rope back towards itself. Thankfully the rope doesn't care which direction the tension comes from it will still exert equal force upon its ends, ie pulling towards its centre.)



    An easy way to calculate mechanical advantage is to count the number of parallel ropes in tension between the load and the effort. For my diagram above, the ropes to count are red. Count through where the MA and VR are listed.

    Weakestlink's figures do account for friction in the system whereas my physics based diagram is a 'perfect' friction free environment.
    Hey Mark, For some reason I can't see your diagram on my computer, Its ALL BLACK with text faintly visible as below, other people can obviously see it as you have been thanked for your post. Below is a screen cap of how I see your diagram.



    Really Weird, but when I put it thru photoshop I can see it clearly,

    Any one else have this issue, or is it just me , or a mac vs windows thing ??


  2. #42
    Join Date
    Apr 2008
    Location
    Near Seven Hills, Sydney
    Posts
    4,342
    Total Downloaded
    0
    Hi Don, it is probably a legacy of the program I used.
    Hopefully the following is better

  3. #43
    Join Date
    Jul 2011
    Location
    Yarrawonga, Vic
    Posts
    6,568
    Total Downloaded
    0
    Quote Originally Posted by isuzutoo-eh View Post
    Hi Don, it is probably a legacy of the program I used.
    Hopefully the following is better
    Yes I can see it now, thanks. I wonder if I was the only one that could not see it, BOTH, the drawing & the way the block worked

  4. #44
    Join Date
    Jun 2008
    Location
    The new Gold Coast, after ocean rises,Queensland
    Posts
    13,204
    Total Downloaded
    0
    well, all that convo is enlightening, but the topic was portable winches. I now carry with me a 6 ton come a long with a long chain. It can be carried with one hand , is simple to use, takes up little room, uses no electricity. On a long recovery may have to be reset more than once. I havent had to use it yet but may have to on my next trip. It seems a really easy answer to me as I dont want to have an electric winch hanging off the front of my vehicle.

  5. #45
    Join Date
    Jul 2011
    Location
    Yarrawonga, Vic
    Posts
    6,568
    Total Downloaded
    0
    Quote Originally Posted by ramblingboy42 View Post
    well, all that convo is enlightening, but the topic was portable winches. I now carry with me a 6 ton come a long with a long chain. It can be carried with one hand , is simple to use, takes up little room, uses no electricity. On a long recovery may have to be reset more than once. I havent had to use it yet but may have to on my next trip. It seems a really easy answer to me as I dont want to have an electric winch hanging off the front of my vehicle.
    Understood, but I don't think that 6 Ton come along will be any good, I suppose its better than nothing (but not by much) You should go and get stuck within walking distance of home, Then practice getting yourself out with that, you'll either bugger it up or chuck it over the nearest fence. I don't think Electric Winches are much use if you get stuck either, you will usually want to be pulling yourself out backwards, not further into the quagmire. You need to invest in a Tirfor style hand winch especially if you go offloading on your own.

  6. #46
    NavyDiver's Avatar
    NavyDiver is offline Very Very Lucky! Gold Subscriber
    Join Date
    Feb 2010
    Location
    Melbourne
    Posts
    10,246
    Total Downloaded
    0

    portable winches V MA and Reeving tackle

    Quote Originally Posted by ramblingboy42 View Post
    well, all that convo is enlightening, but the topic was portable winches. I now carry with me a 6 ton come a long with a long chain. It can be carried with one hand , is simple to use, takes up little room, uses no electricity. On a long recovery may have to be reset more than once. I havent had to use it yet but may have to on my next trip. It seems a really easy answer to me as I dont want to have an electric winch hanging off the front of my vehicle.
    LOL sorry. Most post get off target as did I.
    [ame="http://www.youtube.com/watch?v=zj6N7bgHxJ4"]Lewis Winch snatch block demo, huge log skid. Double the pulling power of a portable winch. - YouTube[/ame] uses a portable winch but it does again claim the MA of 2 which is wrong.

    Portable gives you the ablity to winch from front or back which would be great if running solo with out a mate to help pull you back. The 6 tonne would seem a little light if belly deep in muck as I seem to end up rather often. A Luff or double block and a single block on your portaable giving MA 3.08 (or 2.3 if reeved to disavantage) would give your 6 tonne more than enough ommps but may mean several pulls given the 2 to 3 times reduction in pull lenght.

    This is about portable winch and still on M.A. and advantage. I will skip the friction resulting by the Luff rig.
    Found a neat site on the other stuff ( not just about portables again)
    http://www.btinternet.com/~fourthgill.seascouts/tackle.htm

  7. #47
    Didge Guest
    In diagram bt3, imagine the 100lb weight is the tree with the snatch block and the pulley at the top of the drawing is the winch. The point at the top left is the recovery point on your car to which the winch cable hook is attached. Half the load is taken by the winch and half by the recovery point.
    Attached Images Attached Images

  8. #48
    Join Date
    Jun 2008
    Location
    The new Gold Coast, after ocean rises,Queensland
    Posts
    13,204
    Total Downloaded
    0
    Quote Originally Posted by goingbush View Post
    Understood, but I don't think that 6 Ton come along will be any good, I suppose its better than nothing (but not by much) You should go and get stuck within walking distance of home, Then practice getting yourself out with that, you'll either bugger it up or chuck it over the nearest fence. I don't think Electric Winches are much use if you get stuck either, you will usually want to be pulling yourself out backwards, not further into the quagmire. You need to invest in a Tirfor style hand winch especially if you go offloading on your own.
    Not sure where you're coming from here. The come along is much easier to use than a tirfor and for the same capacity is about 1/4 of the weight not counting necessary cable, and is also a dam site cheaper. I carried 35m of cable with me for years gave it away just a few months ago to Harry(hope you're getting some good use out of it mate).aluminium bodies are available for come alongs now making them lighter again. They pull as fast as a tirfor and tuck away in a nice small parcel.Why will I bugger it up? I have used them often in my job and find them very user friendly.I certainly wont chuck it away. You must have had some bad issues with them.

  9. #49
    Join Date
    Jan 1970
    Location
    Avoca Beach
    Posts
    14,150
    Total Downloaded
    0
    I have had a Warn 5000Lb portable winch for almost 25years.

    Warn then made them in a steel box with a plastic lid, with provision for a receiver , and two shackles which are stored inside the box along with the power cable.So it can be used on either end of the car, or even off the chassis on a rollover, using the shackles as remote mounts .

    I have fitted a towbar under the front bumper to enable front recovery and I have a heavy power cable to the back bumper with an Anderson plug to use the rear towbar.
    In all the time I have owned it , I have used it once in anger to recover a car that had two wheels over a precipice on a RRNSW club trip to the Watagans.

    I had another opportunity on The OTT but it was faster to use the winch on another car waiting to cross the creek to recover my car and trailer, as I would have had to get it out and rig it before use.

    I still think it is a great solution , as it can be stored on the rear seat floor area and is clean and regular in shape so that stuff can be stacked on it and if I am really stuck somewhere it can be utilized.
    I have 2 snatch blocks , 30 metre extension strap, tree protector, and spare shackles.
    It weighs about 24Kg including box and Dyneema cable.
    I also carry a "bullbag" as I have found that if you are really stuck, you need 2 recovery methods eg bull bag to lift out of mud, then winch maybe rolling over the bullbag, which I have actually done, or shovel etc .
    Regards Philip A

  10. #50
    Join Date
    Feb 2009
    Location
    Melbourne
    Posts
    1,201
    Total Downloaded
    0
    Quote Originally Posted by PhilipA
    I have had a Warn 5000Lb portable winch for almost 25years.

    Warn then made them in a steel box with a plastic lid, with provision for a receiver , and two shackles which are stored inside the box along with the power cable.So it can be used on either end of the car, or even off the chassis on a rollover, using the shackles as remote mounts .

    I have fitted a towbar under the front bumper to enable front recovery and I have a heavy power cable to the back bumper with an Anderson plug to use the rear towbar.
    In all the time I have owned it , I have used it once in anger to recover a car that had two wheels over a precipice on a RRNSW club trip to the Watagans.

    I had another opportunity on The OTT but it was faster to use the winch on another car waiting to cross the creek to recover my car and trailer, as I would have had to get it out and rig it before use.

    I still think it is a great solution , as it can be stored on the rear seat floor area and is clean and regular in shape so that stuff can be stacked on it and if I am really stuck somewhere it can be utilized.
    I have 2 snatch blocks , 30 metre extension strap, tree protector, and spare shackles.
    It weighs about 24Kg including box and Dyneema cable.
    I also carry a "bullbag" as I have found that if you are really stuck, you need 2 recovery methods eg bull bag to lift out of mud, then winch maybe rolling over the bullbag, which I have actually done, or shovel etc .
    Regards Philip A
    That's pretty much exactly what I envisioned - does anyone still sell anything like that? Wanna sell yours, Phil? Haha
    Now 2016 D4 HSE 'Leo' and Steve the Triumph Speed Twin
    Then 2010 D4 3.0 HSE 'James'
    Then 2010 RRS TDV8 'Roger' w traxide DBS, UHF, Cooper Zeons, Superchips remap
    Then 2010 D4 TDV6 'Jumbo' w traxide DBS
    First love 2002 D2 TD5 'Disco Stu'

Page 5 of 6 FirstFirst ... 3456 LastLast

Bookmarks

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
Search AULRO.com ONLY!
Search All the Web!