On 2008-09-11, Larry Jaques novalidaddress@di wrote:
On Wed, 10 Sep 2008 17:03:46 -0500, with neither quill nor qualm,
Ignoramus24166 quickly quoth:

On 2008-09-10, Larry Jaques novalidaddress@di wrote:
On Tue, 09 Sep 2008 22:29:46 -0500, with neither quill nor qualm,
Ignoramus15131 quickly quoth:

On 2008-09-10, Larry Jaques novalidaddress@di wrote:
On Tue, 09 Sep 2008 17:48:49 GMT, with neither quill nor qualm, "Ivan
Vegvary" quickly quoth:


"Larry Jaques" wrote in message
news:5p0dc49m9715uqhj8n9ogtdcbnedofds0h@4ax. com...
On Mon, 08 Sep 2008 23:48:48 -0700, with neither quill nor qualm, JR
North quickly quoth:

I don't kniow what the tensile rating is of the chuck joint, but I bet
it's nowhere near that of a properly swaged coupling.

2,680 pounds weight capacity. I wonder if you're supposed to divide
that by the 4mm opening, which would cut it to 422 lbs. Still, that'd
hold a couple large guys standing on one strand of the railing wire.

Actually, no. When applying force perpendicular to a tight wire, the force
multiplies by a large factor. In a pinch, you can winch a vehicle out of a
tight spot by tightly tying a rope between the vehicle and a tree and
applying force perpendicular to the middle of the rope. Needless to say you
have to take up the slack between each push on the rope.

I don't grok that, Ivan. A pull on the middle of the rope would be
equal on all 3 ends, wouldn't it?

No.

Try an experiment, you will need two pulleys.

"Try an experiment, you will need a block and tackle."

NOT the same as he was talking about, Ig.


Fix two pulleys and hang a rope on them like this:

,___________x_________.
|O O|
| |
X X

Again, that's not what he was describing, Ig.

x-------------y-----------x Pull on Y, no pulleys.


It is the same experiment.

Q: Who here on RCM has 3 spring scales with which they can perform
this experiment?


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