Author Topic: Essential Knots?  (Read 45052 times)

Znex

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Re: Essential Knots?
« Reply #75 on: October 17, 2006, 09:54:57 PM »
What's a handy billy?

"A handy billy is a small tackle for general purposes."

From this web site http://www.gwpda.org/naval/br82704.htm


KC

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Re: Essential Knots?
« Reply #76 on: October 18, 2006, 04:45:21 AM »
The differances between the 3 devices is in design; not power.

Luff, Tail Jigger and Hand Billy as shown; all give a 3x Input Force to lift load as potential.  But all also have ~3 1/3 X Input Force loading on support.   Any system friction decreases the the load capacity; but increases the support loading on lifting; but reverse for holding and lowering.  So that load capacity is increased, and support loading is decreased for holding and lowering; where friction works in your favour; only working agianst you in lifting/ compressing pulley jig. 

A 3x can be 2Handed for 4x and 4x loading on support each (X the pull of 1 hand).  But these are 3x with return; so can be 2Handed for 6x power and 6x loading on support.  The return portion 2handed gives a 2x multiplier for the 3/1.  In these systems 2handed; the hand pull portion of force places just as much force on the support/ anchor as on the load; then follow above tendencies for Friction.  1handed pulls with return tend to place more load on support/ anchor than the load you are supposed to be focussing force on.

i think to understand the forces inside the tiny world of a knot/ lacing; it helps to see same forces in bends, angles and frictions in the full size world of rigging etc.  Taken like this; these pulley systems are like internal knot forces under a microscope; with same force ratios; in same materials etc.
« Last Edit: October 18, 2006, 04:51:13 AM by KC »
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KnotNow!

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Re: Essential Knots?
« Reply #77 on: October 18, 2006, 05:32:50 AM »
Hi All,
  I like the ABOK 3229 definition; "Watch Tackle, Handy-Billy, or Tail Tackle is a small luff tackle with a tail on the fall block."  I find hook tackle (luff tackle) useful and keep some short straps to use as pendants on the same rail as my hook tackle.  I keep several tail tackles on hand, if you plait the tails they don't scar up the work you are pulling.  I use some with chain tails for rough work (stumps and such).  I have some with swivels in the tail so I can walk the fall to a favorable pulling angle without stress on the cheek blocks.
ROY S. CHAPMAN, IGKT-PAB BOARD.

Amphiprion

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Re: Essential Knots?
« Reply #78 on: October 18, 2006, 08:32:31 PM »
Thanks for the explanation and link to pics!  All makes more sense now.

Willeke

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Re: Essential Knots?
« Reply #79 on: October 22, 2006, 09:12:18 AM »
Roy,
I have done some reading in this thread and saw your remark
Unfortunately I learned the "Timber Hitch" as the "Timberline" just as I learned the "Square Knot" instead of the "Reef Knot".  Late at night and after much lifting of wood I tend to revert to the language of my birth ('murican with a Yankee pitch). :-[  Just for fun:  Where I was born  "Hitch" was a verb and was for horses and wagons and plows.  "Half Hitches" were "half knots".  I never even knew it was a splice I was making until I got ABOK.  It was "long", "short" or "eye".  This might be a thread for a new post?
I think it is very good to make notes of the different names you use for the knots.
It does not matter where, in a notebook at home or online, but please make sure the knowledge is kept.
We as knotters worldwide tend to use the names from the books, which are mostly the sailors names for the knots. One day we will find a set of notes of someone working knots on a farm in North West USA, and nobody knows which knots he is talking about, because he used the local names. (Or midwest or south, or whateverpart of whatever nation.)

Reminds me of knotnames we used round the house, we always talked about the knot you use to start crochett. (Overhand knot slipped.) And all around knew what we were talking about because we all knew how to start crochetting.

Willeke
"Never underestimate what a simple person can do with clever tools,
nor what a clever person can do with simple tools." - Ian Fieggen

Writer of A booklet on lanyards, available from IGKT supplies.

KnotNow!

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Re: Essential Knots?
« Reply #80 on: October 22, 2006, 09:33:21 AM »
Hi, Wileke,
  A good thought, not just for me but for all.   As I said, I didn't even know I was making  a splice!.
ROY S. CHAPMAN, IGKT-PAB BOARD.

Lasse_C

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Re: Essential Knots?
« Reply #81 on: November 10, 2006, 10:26:49 AM »
Just a short message: I have not forgotten this thread that I started. I have just been too busy to sit down and sum it up. Since it now is on 6 pages, it has apparently aroused some interest!  ;D

Lasse C

DerekSmith

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Re: Essential Knots?
« Reply #82 on: November 14, 2006, 09:58:07 PM »
Roy,

Willeke makes a very good point and I feel we could take steps to save this knowledge.

To start with though, could you enlarge on your use of terms - what else do you remember that you could share with us?

Derek