Thread: Will they ever learn?

Originally Posted by Tank

You just don't get it, do you, Quote: "according to tank", it's not according to me, It is a fact of life, it is the Laws of Physics, it's the Vibe, for ****'s sake, Regards Frank.

Sorry Tank Just to thick

AM

Mod hat on.

Gentlemen, either agree to disagree or get a room. Either way keep the personal shots out of the discussion.

Back to your regular programing.

Originally Posted by Ancient Mariner

Spoken like a true Weekend warrior

EX crane operator chaser/rigger also


When I'm touring or being a weekend warrior I try not to put myself in those situations, to much like hard work

Here is an example of a fixed pulley (on the left) that has no mechanical advantage, providing the force is applied by a winch that remains at a fixed distance from the pulley.



Where winching your own vehicle differs is that the winch and the load are moving relative to the pulley, therefore getting a MA of 2. The second illustration shows a moving load and pulley. Both the winch and the cable anchor are attached to the same object. Where a certain person is hanging up is that a winch can not tell the difference between a moving anchor and a moving load. The winch does not consult a GPS to determine if it is moving. A winch cares not if a tree is pulled over by a stationary vehicle or a tree is pulling a vehicle out of a bog. All it knows is that the pulley moves relative to the winch and load combined. A vehicle using a rope passing through a pulley and returning to the vehicle is a moving pulley problem not a fixed pulley problem. The third image is also showing a MA of 2, the second pulley is just a stand in for a winch or capstan and adds no mechanical advantage.

Simple physics.

Originally Posted by Redback

EX crane operator chaser/rigger also


When I'm touring or being a weekend warrior I try not to put myself in those situations, to much like hard work

A good strategy but like they say **** happens and could be your mate over the edge

AM

Originally Posted by bee utey

Here is an example of a fixed pulley (on the left) that has no mechanical advantage, providing the force is applied by a winch that remains at a fixed distance from the pulley.



Where winching your own vehicle differs is that the winch and the load are moving relative to the pulley, therefore getting a MA of 2. The second illustration shows a moving load and pulley. Both the winch and the cable anchor are attached to the same object. Where a certain person is hanging up is that a winch can not tell the difference between a moving anchor and a moving load. The winch does not consult a GPS to determine if it is moving. A winch cares not if a tree is pulled over by a stationary vehicle or a tree is pulling a vehicle out of a bog. All it knows is that the pulley moves relative to the winch and load combined. A vehicle using a rope passing through a pulley and returning to the vehicle is a moving pulley problem not a fixed pulley problem. The third image is also showing a MA of 2, the second pulley is just a stand in for a winch or capstan and adds no mechanical advantage.

Simple physics.

In the third image if the weight is the vehicle and the winch on the vehicle is at the end of the red arrow I would have thought that is a MA of 3 versus a straight pull.

The effort is being spent over 3 times the distance.

I only did physics and applied maths so don't go too hard!

cheers, DL

The Chicks love 'em though, so manly, and look at those really cool tuff cut of sleeves. A bloke could never get snot that far up his arm.

Originally Posted by 350RRC

In the third image if the weight is the vehicle and the winch on the vehicle is at the end of the red arrow I would have thought that is a MA of 3 versus a straight pull.

The effort is being spent over 3 times the distance.

I only did physics and applied maths so don't go too hard!

cheers, DL

Quite correct, but that would be a different picture. What was pictured assumes that the load and "winch" were not mounted together.