Author Topic: Is this a new friction hitch?  (Read 6701 times)

tuttle

  • New Member
  • *
  • Posts: 6
Is this a new friction hitch?
« on: November 25, 2012, 07:41:04 PM »
Hi, I am new to this forum and found it by searching for 'new knots'

I am a tree surgeon, and have been experimenting with friction hitches for climbing.

The knot looks similar to 'gripping sailors hitch' i have searched over 30 friction hitches but cannot find this one.

Hope someone can shed some light on it.
« Last Edit: November 25, 2012, 07:59:10 PM by tuttle »

tuttle

  • New Member
  • *
  • Posts: 6
Re: Is this a new friction hitch?
« Reply #1 on: November 25, 2012, 07:41:50 PM »
pictures

SS369

  • Global Moderator
  • Sr. Member
  • *****
  • Posts: 1992
Re: Is this a new friction hitch?
« Reply #2 on: November 25, 2012, 08:04:42 PM »
Hi tuttle and welcome.

Your offering looks like either the Distal or the Michoac?n. Both used and regarded highly in the arborist community.

Here's a good link to check out.  http://www.treeservicesmagazine.com/article-6706.aspx

SS

tuttle

  • New Member
  • *
  • Posts: 6
Re: Is this a new friction hitch?
« Reply #3 on: November 25, 2012, 08:17:10 PM »
hi, its definatly not a distal and looks similar to the michoacan, but the exits are different.

thanks for the link. :)

tuttle

  • New Member
  • *
  • Posts: 6
Re: Is this a new friction hitch?
« Reply #4 on: November 25, 2012, 08:40:54 PM »
just double checked the michoacon, mines different and sits sweeter.

SS369

  • Global Moderator
  • Sr. Member
  • *****
  • Posts: 1992
Re: Is this a new friction hitch?
« Reply #5 on: November 25, 2012, 11:47:56 PM »
I'm interested, so could you offer some more or better picture(s). I would like to see completely around the hitch. I have to assume that this is part of a closed system?
Also please explain what "sits sweeter" means.
TIA

SS
« Last Edit: November 26, 2012, 12:08:50 AM by SS369 »

X1

  • Inactive
  • Sr. Member
  • *
  • Posts: 1200
Re: Is this a new friction hitch?
« Reply #6 on: November 26, 2012, 12:15:53 AM »
   I have a very limited knowledge, if any, on climbing hitches, and no climbing experience whatsoever !
   However, this hitch looks nice to my naive eyes...I would prefer it with one more round turn at the upper part ( 4, in total ). Have you tried it with 4 wraps ? 
« Last Edit: November 26, 2012, 12:16:40 AM by X1 »

tuttle

  • New Member
  • *
  • Posts: 6
Re: Is this a new friction hitch?
« Reply #7 on: November 26, 2012, 08:58:47 AM »
3 wraps are perfect for ascension, 4 are to many - but that may depend on user.

X1

  • Inactive
  • Sr. Member
  • *
  • Posts: 1200
Re: Is this a new friction hitch?
« Reply #8 on: November 26, 2012, 12:26:48 PM »
   I have thought of the forth wrap, because I am interested in friction hitches tied around main lines of the same rope diameter. If the material is a little stiff, a fourth wrap forces the nipping tube to close around the tensioned main line and constrict it tighter, I think. Could you, please, try it around a rope of the same rope diameter, with three and four wraps, and with a softer and a stiffer material, and tell us your results ?

tuttle

  • New Member
  • *
  • Posts: 6
Re: Is this a new friction hitch?
« Reply #9 on: November 26, 2012, 07:22:36 PM »
well, i think if its tied on the same diameter it would be too bulky, the ropes in the pictures are 8mm and 13mm, that is the standard for tree work.

i don't think it would offer much friction either.

X1

  • Inactive
  • Sr. Member
  • *
  • Posts: 1200
Re: Is this a new friction hitch?
« Reply #10 on: November 26, 2012, 08:03:39 PM »
if its tied on the same diameter it would be too bulky

  I do not know what "bulk" has to do with tree climbing, but, for a general use friction hitch, it is not such a big deal.

I don't think it would offer much [more] friction either.

   Is nt it 4 always better than 3, as 6 are better than 4 ? (I am referring to 6 and 4 wraps Prussik, as reported at :
http://www.arboristsite.com/commercial-tree-care-climbing/63244.htm

Dan_Lehman

  • Sr. Member
  • *****
  • Posts: 4123
Re: Is this a new friction hitch?
« Reply #11 on: November 27, 2012, 12:54:18 AM »
just double checked the michoacon, mine's different and sits sweeter.

I haven't encountered the exact formation that you present,
but in some sense it IS the michoacon slightly altered on the
finishing tuck --on opposite side of the object rope.
But, then, the m. is intended to be loaded on both ends,
not one, like the Prohgrip (aka "Blake's hitch"); this is quite
a difference.

What you present is thus more like the Prohgrip (Blake's) but with
the tail reaching back and then tucking the opposite way
through (just) a single turn of the near-loaded helix (whereas
Prohgrip tucks up through two turns, in the standard
form of the hitch.  So --though I'm yet to play with the hitch--,
I would expect your hitch to be well gripping on same-diameter
lines, which is a strong point of the Prohgrip (and a common
arborist circumstance, one of two forms of climbing).

Heinz Prohaska --the earlier discoverer of "Blake's hitch", hence my
invention of that name...-- points out that the number of coils
of the knot and extent of tucking the tail can be adapted
to conditions : more tucking for stiff ropes, more untucked-under
coils for slippery but flexible ropes.  And, YMMV per person who
will be loading the knot.


Tuttle, thanks for sharing your invention and experience!
Cheers,
--dl*
====
« Last Edit: November 30, 2012, 07:21:04 PM by Dan_Lehman »