Vehicle & Technical > Discovery

Has anyone used these guys n their rear recovery point?

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Disco Matt:

--- Quote from: lambert on January 30, 2010, 22:43:51 ---also be aware that a bridle between two jate rings can, if too much force is, used pull the rings together bending the chassis, a friend found this to his cost and now uses two strops of equal length joined to a steel frame to act as a spreader bar, like used when lifting.

--- End quote ---

I wouldn't have thought about that, but can see it being a risk!

Does this apply if you have a bumper with a couple of swivel recovery eyes built in? I'm about to order an 8t rated shackle to use with a 2m strop as a bridle with mine, but obviously I'd want to rethink if that's not a good idea.

Chris Putt:
Without wanting to be a bore... the angle at which your bridle forms a Y can be a problem, if its to great a Y (ie. over 90 degrees) then yo actually begin to multiply the loading on each anchor point, so two long strops, at a shallow angle would be a better solution. Tow strops with a spreader bar and a central pulling point will do much the same.

Chris

dxmedia:

--- Quote from: Chris Putt on January 31, 2010, 21:08:48 ---strops with a spreader bar and a central pulling point will do much the same.

Chris

--- End quote ---


That sounds like a lethal combination.

Disco Matt:
Surely the longer the bridle the better?

I'm no engineer but it strikes me that a longer bridle (putting the shackle that the big tow strap is attached to further away from the car) will mean that there's less force trying to pull the two recovery points together? Same as if you had a straight strap between the two with no slack it would place a lot of lateral stress on the two recovery points, but making it a sharper angle will mean that more of the stress is exerted longitudinally.

dxmedia:
Yes.

I've all the calculations in a book upstairs, but yes, the longer the better. I think that over 30 degrees is needed off the top of my head :S

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