A winching challenge

[wellzy]

why not pull the 4x4 out forwards turn it round and drive it back in and pull it out and then you'll be facing the right way as well.

 

[Terranosaurus]

why not pull the 4x4 out forwards turn it round and drive it back in and pull it out and then you'll be facing the right way as well.

Perhaps you can't but thats not the point - it is a puzzle to see if people could work it out not a serious situation. It actually comesfrom one of the Landy mags who were reporting on a 4x4 Response training session, probably goes back much further. It was used at the training session at the end of a winching course, its a fairly good way of seeing how well people understand what is going on when you start using multiple snatch blocks.

 

[iandouglas]

A winching challange

hi simon.
if you put the winch rope under the truck and fasterned it to a plough would that do the same thing .
rgds.iandouglas

 

[Terranosaurus]

hi simon.
if you put the winch rope under the truck and fasterned it to a plough would that do the same thing .
rgds.iandouglas

Wou more than likely wreck the front end of te vehicle and also there would be a definite tendency for it to pull downward which would more than likely get you more stuck. With the addition of 2 extra snatch blocks the aboe techniques works even if you can't get to pass the rope under the vehcile.

 

[zippy656]

Hows a bout a pic of what you mee, or a video if you can find one on here some place.

 

[Terranosaurus]

Hows this? Its a G-wagon obviously btw.

 

[wellzy]

correct me if i am wrong, but that would pull the bumper off doing that. think about the way the winch wire goes when you reel it in, unless the anchor in front was another 4x4 that moved slowly backwards?

 

[wellzy]

no sorry ignore me, talking rubbish again:doh:naughty

 

[zippy656]

correct me if i am wrong, but that would pull the bumper off doing that. think about the way the winch wire goes when you reel it in, unless the anchor in front was another 4x4 that moved slowly backwards?

im with you here...


it cant work.. the cable gets shorter...

so some thing must "give" or the 4x4 get longer...

 

[zippy656]

sorry for beeing so thick.

the front anchor must mace back too surly ?

 

[wellzy]

it works but, in my eyes it would be better to winch out forwards turn round and get it stuck rather then put the winch and chassis under the amount of strain that would create.

 

[wellzy]

plus the amount of kit you would need for that would exceed what your average off roader carries.

16,000LB + winch, extra winch cable, 3-4 snatch blocks, 6-7 c rings. a professional off roader who is off road head deep in it every weekend yes they might have this much kit.

 

[Terranosaurus]

It was a PUZZLE not a serious recovery operation - I give up. Do you fill crosswords in with whatever words you fancy or answer the questions?

 

[wellzy]

i know it was a puzzle but they tend to give you a limit on how much stuff you can use.

 

[extreme-4x4]

it will work, and wont strain any chassis as its not fixed to the chassis except on the front of the truck , so its not pulling itself apart... basicly as the winch winds in the cable gets shorter and pulls it back because the cable is only attached to the truck and a solid thing so the truck moves towards the solid thing. the snatch blocks are just wheels to divert the cable

they also work to increse the pulling value of the winch if needed on other set ups

only thing im trying to work out is what pulling value and speed that set up gives
would that be same as standard winch

 

[Terranosaurus]

Hows this? Its a G-wagon obviously btw.

There will be a "pulling the vehice apart effect but there always is, if the axles are stuck and you try to winch out there will be forces generated everwhere from the winch to which ever bit(s) are actually holding it. This set up is pretty much the same.

Force at the winch end as always will be however much force the winch is generating so up to 16000lb with a big winch I suppose assuming its got a virtually empty drum and the electric set up can provide enough current.

At the rear there is a 2:1 pulley set up so the force pulling at the rear will be double that at the front. It is this diferential of forces that causes the vehicle to move, that an of course the fact that it is able to because as it moves back twice as much cable is released as is needed at the front to purely allow the truck to move.