How to kill yourself / your mate / bystander ....





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  1. #1
    4ePajero Guest

    Thumbs down How to kill yourself / your mate / bystander ....

    If it was posted as a joke, even then I would not have believed it!

    Trail Recovery Hook.
    Attached Images Attached Images  

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    Ironic that the author of that article is shown in a photo on the left in front of a sign which reads, "Death Valley National Park"

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    As jy die storie lees klink dit darem of die ou 'n grap maak - maar dit lyk baie "offisieel". Kan moeilikheid veroorsaak.
    Last edited by Uys; 2009/07/08 at 06:58 PM.
    Everything is a hammer.
    Unless it is a screw driver.

    Then it it a chisel.

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    Eish ... ... .

    Can you imagine starting to pull and this gadget unhooks while you are applying full force WTF
    Deon

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    PS: I have never bought or built a car with fuel economy in mind - it's like oxygen, you need it, you get it.

    It is big, green and loves doing it in the mud


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    What happened to linking those 2 slings with a towel or a magazine.

    If a cowboy on a trip that I am on uses that, I will be gone.
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    Why is this so unsafe?
    What is the difference between using this and using the same recovery point on the vehicle itself? Surely the exact same bolts holding it in place.

    I agree with the quote on the article
    "The Trail Recovery Hook is no substitute for having a properly set up rig" but the problem is probably the hook that can slip out rather than it's strengh?
    Last edited by r2d2c3po; 2009/07/10 at 01:45 PM.
    If you don't have a sense of humour, you probably don't have any sense.

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    Oh no, definately not the same. If one of the straps break, the recovery point is not securely attached to a vehicle and it effectively becomes a high velovity projectile. If the strap that remains in tact is a snatch strap at full extension, you'll have a chunk of steel flying at you at about 300km/h.

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    'n M**rse kettie... Stand back. No, stand back more. Now another 100m...

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    Quote Originally Posted by Zantus View Post
    Oh no, definately not the same. If one of the straps break, the recovery point is not securely attached to a vehicle and it effectively becomes a high velovity projectile. If the strap that remains in tact is a snatch strap at full extension, you'll have a chunk of steel flying at you at about 300km/h.
    Oh. did not think of it that way...
    What wold be the best way to join two ropes together?

    Would it be to thread the two through each other?
    If you don't have a sense of humour, you probably don't have any sense.

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    Quote Originally Posted by r2d2c3po View Post
    .............
    Would it be to thread the two through each other?
    No but yes.

    Thread them through, then put a magazine or a towel(rolled up) in between. If you don't, you won't get them loose again.
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    Default Is this good info or bad info?

    As a matter of learning for a newbie, how does this article rate as a 'how to' on joining snatch straps?

    Regard it or disregard it?

    https://www.tektrek.com.au/images/4W...y%20straps.pdf

    Your comments will be appreciated.
    Paul.

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    The lesson is dont use anything with relative high mass in joining ropes? A Snatch rope complicates things a bit cause a winch cable can be weighed down (heavy jacket etc)to stop it from becoming a projectile, but the stretch is so little that the energie stored in the cable can be directed onto the ground. With a snatch rope the stored energie is tremendous. In my view a snatch rope is your last option after a normal rope? (if no winch) Am I correct?
    Torch

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  13. #13
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    Quote Originally Posted by r2d2c3po View Post
    Oh. did not think of it that way...
    What wold be the best way to join two ropes together?

    Would it be to thread the two through each other?
    Bear in mind that the frictional force of two snatch straps looped together (or a snatch strap looped back over itself) can cause the strap/s to 'melt' together.

    IMO the safe bet is never to join them, because the join won't have the same strength or flexible properties.

    If you must, then use a towel, never anything that could become a projectile.
    DV8 - I'D RATHER BE OFFROAD

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    I really can't see the problem with using this device with non-kinetic ropes or straps as they do not exhibit the same slingshot characteristic.

    Surely if you employ this device you could always put a heavy jacket over it to dissipate any stretch the strap/rope may have?

    What am I missing here?
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    FOR THOSE NEW TO 4X4

    IN THE INTEREST OF SAFETY!

    for what it is worth - we learned to join 2 straps with a bundle of grass or a stick. these weigh virtually nothing and reduce the risk of injury from flying objects 100 fold. Also normally freely available. i agree with the others - never use metal!
    let me try (in words) to describe how to join 2 straps.
    assume strap A and strap B.
    Put the one end of strap A through any "eye" of strap B. now put the "loose end" of strap B through the trailing eye of strap A. when pulling the loose ends of both straps apart, the 2 eyes in the middle will close on one another and look the same both sides of the "knot".
    just before they "lock", pass a handfull of hard grass such as thatch grass (preferably green - not bone dry), reeds or a sturdy stick approx. 25mm thick between the 2 straps. when then pulling the ends, the two straps will "lock" on the grass or stick preventing them from permanently locking together.
    I will take some photos and post on this site for those who are interested.

    Remember some time ago the vehicle recovering the other where the standard towball broke off and flew through the windscreen of the other almost killing the guy inside. do not recover with standard towbars or towballs. they are designed to pull along 1 000 kg of trailer or caravan, not a 5 000kg snatch. you often see 8 000kg snatch ropes snap. this means that you have exceeded 8 000kg or more of energy.

    1) RATHER STRAP AROUND THE CHASSIS IF THERE ARE NO DECENT RECOVERY POINTS AVAILABLE ON THE VEHICLE.

    2) THE VEHICLE BEING RECOVERED SHOULD PREFERABLY HAVE ITS BONNET UP TO SHIELD THE DRIVER IN THE EVENT OF THE TOW RIG FAILING. I HAVE SEEN SEVERAL ROPES BREAK AND HIT THE BONNET. RATHER DAMAGE THE BONNET THAN THE WINDSCREEN AND YOUR FACE.

    3) RECOVER IN A STRAIGHT LINE IF POSSIBLE.

    4) BE CAREFUL OF VEHICLES STUCK IN MUD. BECAUSE OF THE MUD SUCKING THE VEHICLE IN, IT IS ADVISABLE NOT TO SNATCH BUT RATHER SLOWLY RECOVER BY WINCH TO BREAK THE SUCTION.

    A QUICK SCENARIO:

    Kinetic energy is defined by the formula Ek = 0.5 mv2
    assume 30 km/h = 8.333 m/s and the vehicle weighing 2 500kg being brought to a standstill in 1 second
    then the energy generated by a snatch will be approx. 85 kJ.
    assume a trailer weighing 1 000kg being accelerated to 100 km/h in 10 seconds, the energy will only be approx. 39 kJ/s.
    the strain from a snatch of only 30 km/h will be more than double that of the normal towing conditions of quite a heavy trailer or a medium sized caravan accererating away from a stop by a powerful towing vehicle. normally the forces would be half of that as accereration is slower than quoted.

    enjoy but be careful

    always carry a cellphone if emergency assitance is required.
    preferably have a GPS handy to give GPS co-ordinates to emergency services. offroad directions are normally very difficult to follow.

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    Quote Originally Posted by landyluvver View Post
    FOR THOSE NEW TO 4X4
    and the regulars.

    Hi LANDYLUVVER,
    Thanks for your effort to teach us the safe way of doing things.

    Disco 2 V8 XS

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    Safety in recovery is extremely importent.
    Herman Engelbrecht AKA Engel does training on all you need to know about safe 4x4 ing. Do yourself and your vehicle a favour and book the training with him.
    Money pend on training comes before money spend on gadgets. You can have all the gadgets in the world,If you dont know what you are doing someone will get hurt

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    Ok, one question?? if you use a magazine to joint the straps, what do you read later when nature calls??

    Pierre van Pletzen

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  19. #19
    Bok-vir-sports Guest

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    Quote Originally Posted by Allegro View Post
    Ok, one question?? if you use a magazine to joint the straps, what do you read later when nature calls??
    you read the owner's namual to fix the recovered vehicle

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    That thing would be like batmans boomerang if that rope snapped.Watch out kiddies death on the horizon.

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