Trying Out The VT !!!

[NickfromWI]

Don't worry about him...

Joe-
Dont worry about RockyJSquirrell. He gets a bit feisty every now and then. Maybe your advice struck home and he took offense. Brian, he's right, though. You have admitted in the very recent past that you don't often use the FS. The use a friction saver will prolong the "newness" of your rope. This just might keep things running smoother and easier for a longer time.

love
nick

 

[John Paul Sanborn]

Brian, I've found that if you tend the rope with your feet or spare hand you can shake the hockeling out as you come down.

Nick, could you make it a Tri-fold assembly? That should render 4 inside surfaces. Though end up kinda bulky.

I think i would want less inside and get a second unit.

Is there stowage for the carabiners?

 

[NickfromWI]

JPS-
It's a quadra-fold, I guess. I will leave it for just 4 pullies, and some carabiners. Hows that sound?

love
nick

 

[John Paul Sanborn]

Sounds good.

 

[Joe]

deleted post

 

[Joe]

deleted post

 

[dbeck]

JPS, any visuals on that pulley/cord/carabiner combination you spoke of? I'm not grasping the idea...is the cord actually tied to the pulley itself?????

 

[John Paul Sanborn]

I gotta speak up for Joe, I've known him for a number of years via the internet, and have hung out with him at several shows.

He's got a sharp mind for details and knows what he's doing.

 

[John Paul Sanborn]

Originally posted by dbeck
JPS, any visuals on that pulley/cord/carabiner combination you spoke of? I'm not grasping the idea...is the cord actually tied to the pulley itself?????

Since I don't use it, i have no pic's of it.

My understanding is that the bar going between the cheekplates on this pulley is called the beckett.

One end of the tress cord is tied to the beckett permenantly,

you tie your hitch with it on and

then put the carabiner in the knot on the other end

then the pulley on the carabiner

As Oskar points out, this may not be an ANSI compliant system.

 

[treeman82]

John, I just checked with my Sherrill catalog and it says the tensile for that pulley is 4,945# and the WLL is 500# I would think that is a bit light duty to use for that purpose.

 

[John Paul Sanborn]

Originally posted by treeman82
John, I could be wrong but I thought I saw in the Sherrill catalog that, that particular pulley is only rated for 4,000 pounds tensile. I will go get the book now and check though.

As I said, may not be ANSI compliant. Depending on how you interperet the paragraph.

 

[treeman82]

Looks like I edited my post a bit too late. However, also I thought that all parts of our systems were supposed to have a tensile strength of at least 5,400 lbs. Or maybe that is just me getting confused with rope ratings, and system ratings. :alien:

 

[John Paul Sanborn]

I beleive a strict reading limits the 5000# rating to snaps and carbiners.

Since the Fixe is taking 1/2 the load some claim it is technicaly ok to use in the system.

 

[dbeck]

2 questions:
1- is there any advantage to using the hitch apparatus w/ the fixe pulley? (over just putting the purple cmi pulley between your fisherman's knots?)

2- 5000 lbs on snaps and carabiners, but 5400 on ropes. I've known this all along, but why do they rate ropes higher than they do hardware? Is it to compensate for ropw wear? JC.

 

[Stumper]

Back when the standards were first established the 5400lb rope spec reflected the strength rating of Samson Arborplex---finally a synthetic rope made specifically for arborists!.

 

[NickfromWI]

Originally posted by dbeck
2 questions:
1- is there any advantage to using the hitch apparatus w/ the fixe pulley? (over just putting the purple cmi pulley between your fisherman's knots?)

I don't know what it is, but I tried it this weekend, and man, is it smooth. Give it a shot and see if it works in your setup.

love
nick

 

[rbtree]

dbeck,

I have several of each, and prefer the CMI as it takes up less room.

Some guys, as mentioned above, like to tie one end of their friction knot to the Fixe beckett.


below:

Tree house for rent???

 

[Kneejerk Bombas]

Originally posted by treeman82
John, I just checked with my Sherrill catalog and it says the tensile for that pulley is 4,945# and the WLL is 500# I would think that is a bit light duty to use for that purpose.

Dude, it's only holding one half of the tres cord, and that cord only needs to be rated at 2700 lb.s by current interpretation of ANSI. So, 4945 lbs is almost twice what the tres cord is rated!

The only legitamate question is wether or not the becket is rated by Petzel.

 

[John Paul Sanborn]

So it takes up 1/4 of the system load.

And since the thing is attached to a friction hitch, if 1250# were applied the know would probably creep a little.

 

[rahtreelimbs]

I used a longer tress cord for my VT today. Started out with a cord 54" long. Tied double fisherman knots. The extra 3" on each side made quite a difference. It releases easier and slack can be tended a lot easier. With rope weight it seems to want to advance on its own! Me thinks I got it!