Thread: Will they ever learn?

Originally Posted by bee utey

What counts is the relative movement between the pulley and the vehicle, not some arbitrary notion of something being fixed. As has been pointed out numberless times, if you are "x" metres from the pulley anchor, you need 2 times "x" metres of rope to hook it up. When you have would 2 times "x" metres onto your winch drum, you have moved "x" metres closer to the anchor. Therefore, you have gained a MA of 2. A blind man could see that.

I guess that only proves that this blind man is better at understanding simple principles clearly demonstrated in videos than some others.

Originally Posted by johntins

Not irrelevant at all. It is precisely the point. The argument has been put that a single, fixed pulley can provide MA, which it demonstrably cannot, or that a moving pulley does NOT give MA, when it demonstrably does. The video of the winch to fixed pulley and back to the car even SAYS that there is no MA.

That may be what the argument has become in some people's minds. However what started this discussion several threads ago (yes, I mean several threads ago, not several posts ago) was whether the load on the winch could be reduced by attaching a snatch block to a tree.

For reasons that bee uty mentioned, converting that original discussion to a discussion about mechanical advantage has just confused some people.

PS. I'm still waiting for an answer to my question in post #43

Originally Posted by vnx205

That may be what the argument has become in some people's minds. However what started this discussion several threads ago (yes, I mean several threads ago, not several posts ago) was whether the load on the winch could be reduced by attaching a snatch block to a tree.

For reasons that bee uty mentioned, converting that original discussion to a discussion about mechanical advantage has just confused some people.

PS. I'm still waiting for an answer to my question in post #43

This thread was hijacked by this:

If you can't agree a snatch with 3- 4 straps from better ground is better than 1 or 2 from crap ground you probably agree with Tank on 2 to 1 snatch block winching not that we want to go there again

AM

Originally Posted by vnx205

PS. I'm still waiting for an answer to my question in post #43

An answer from who, exactly?

Originally Posted by bee utey

What counts is the relative movement between the pulley and the vehicle, not some arbitrary notion of something being fixed. As has been pointed out numberless times, if you are "x" metres from the pulley anchor, you need 2 times "x" metres of rope to hook it up. When you have would 2 times "x" metres onto your winch drum, you have moved "x" metres closer to the anchor. Therefore, you have gained a MA of 2. A blind man could see that.

Another way of showing it .....................

Originally Posted by johntins

I guess that only proves that this blind man is better at understanding simple principles clearly demonstrated in videos than some others.

I have an old hand winch that I bought as a teenager to pull engines and shift heavy lumps at ground level. Sometimes you used it winch end moving, sometimes winch end fixed. Does it know the difference between a fixed hook and a moving hook? Naah, just waggle the handle and the distance between the hooks shortens by half the rate the cable is wound up.

Originally Posted by bee utey

I have an old hand winch that I bought as a teenager to pull engines and shift heavy lumps at ground level. Sometimes you used it winch end moving, sometimes winch end fixed. Does it know the difference between a fixed hook and a moving hook? Naah, just waggle the handle and the distance between the hooks shortens by half the rate the cable is wound up.

Gone away from the point, at least the point I was interested in, which was the single fixed pulley. As I said to AM, he needed to reframe his question. Since then it has degenerated into a slanging match. I concede I misinterpreted the point.

Originally Posted by johntins

An answer from who, exactly?

Anyone. I'm not fussy. There seemed to be quite a few people who wanted to become involved in the discussion. I was hoping at least one of them would respond.