using a friction hitch with a come-along

[Plasmech]

It is acceptable to use say a prusik knot on your bull rope for purposes of getting the right "stroke" on your come-along or is this asking too much of a friction hitch? Thanks.

 

[Job Corps Tree]

I have all the time to preset the come-along (Get all the pull I can) If you have to pull to hard it will Slip or even Tranfer color ( Hot) A lot of the Trainers would rather use a Prusik than say a Gibbs Ascender, Prusik will not Pinch off the line like a Gibbs, you can move a Prusik up and down the line but if you have any Mid-line Knot where you put it it will have to stay. You can preload a line and tie off that line and slid the prusik, the come-along and pull again

 

[TDunk]

Wouldn't a Masdan work better ?

 

[TheTreeSpyder]

A "maasdam rope puller" (?) wouldn't lose leverage like a come-a-long; but; is maid for 1/2" 3-strand only.

Prussik can work for a force range; but then slip as noted/ so is useable but has it's limitations. Slip can be lessened by having slack 'below' Prussik so that that part of the rope is thicker (than the part at Prussik and 'above' that is under tension). Also, can place slipped Half Hitch in slack, and seat Prussik to it to help.

The strategy also allows use of other leveraging devices. Like a chain hoist, that neither loses leverage (like winch and come-a-long), and; your effort input is continuous (because you aren't pulling, stopping, reverse to start, pulling).

 

[zopi]

Good question..I have been pondering the manual labor involved in
getting logs onto my sawmill and turning them once they are there...came up with building an arch over the dead deck and using a set of blocks and a bull rope/prussik to parbuckle them up onto the dead deck then reversing the
pull to turn the logs which are too heavy to turn by hand...the friction hitch makes it faster...

 

[TheTreeSpyder]

We would parbuckle up a ramp, for 2x1 x ramp advantage; and have that powered by a truck pull. Maid it so that the truck pulled at a bight. The bight allowed to slide freely so lended self adjustmeant. At first this was just thrown over the ball; but this draws everything to a point and thus gives less leveraged stability. So, then placed Turn over spread Tow Hooks and slide thru easily. This allowed self adjustmeant; and a wider/ more table pull up ramp(s).

 

[newb]

I use a prussik with my fiddle block, same thing I think.

 

[outofmytree]

Tree spyder when you say prussik for this particular use which prussik do you mean? Personally I would use something bullet proof like a 3 turn or even 4 turn english prussik but I bow to your greater knot knowledge.

Enlighten me?