Removals

[ QUOTE ]
DWT! Double whip tackle, I learn something new every day /forum/images/graemlins/bounce.gif

[/ QUOTE ]

Sorry Roger. It was just a bit long for me to type out last night. I'll try to not skimp next time. /forum/images/graemlins/grin.gif
 
Awesome pics Mark. I've used the DWT in situations were I've had to pull over some heavy back leaners and it works great.

So what kind if Stihl is that heated saw? Is it an MS440 OR A MS460? Where did you get that cool Timbersports bar?
 
Hey Mark,
When You get a chance, can you explain the set up of the Double Whip Tackle, what attachment knots you use, etc. Looks interesting. Thanks
 
Carl,

I just used a cow hitch for both of the blocks (locked with 2 1/2's). The rope is terminated with either the same, a dbl clove hitch or some type of running bowline. It's really your choice to use whichever hitches you prefer for each spot. The importance is remembering how it will be loaded and how big of a load you will see.

I use it to ease the strain on the winch in larger hoist operations. It takes more cranks to move it obviously, but it is easier to turn. Plus you share the load on more parts of rope. It's a 2-part line /forum/images/graemlins/grin.gif
 
Another advantage of using a DWT is that the anchor and redirect loads can be spread apart. This reduces the load. Look in Mark's pic above. If a trad redirect were used all of the load would go through one point. With the DWT the load is [theoretically] halved. It can be reduced even more by spreading the two points apart.

You can 'drift' a bit with carefully chosen anchor points. Sometimes the load needs to come back at an angle to the redirect.

DWTs can really speed up lowering. Even though the rope moves at half speed, twice as much can be lowered with half the holding/pulling power. When I got my DWT system dialed in my crew figured that we eliminated about half to two thirds of a person on the crew.
 
Taint me askin Mark /forum/images/graemlins/laugh.gif

I use DWT a for a majority of my winching, I do it for the same reasons anyone does, spread out loads, rig bigger pieces, faster and safer.

I got 190' of warp speed in this week, gotta splice it up. 1/2" line 21k abs.

Using DWT smartly can really move some big wood with ease. I have used it for speed lining large loads (block on tree, 2 legs equal tension), lifting large loads (entire trees/leads at a time)and pulling large loads (the aformentioned heavy back leaners).

I have used a tripple whip tackle to pull over a storm blown leaner using 400' of 9/16" stable braid for the 3:1 and another 250' of 5/8" stable braid for the redirected tail. Worked like a beauty!

PS: I rarely use a clove hitch unless I am rigging down a boquet without slings. I perfer one of the bowlines for most all of my knots in the system. If I am attaching a sliding point I use a khelmist normally with 1" tubbing if its up to it strength wise (under 2k lbs, retire the slings rather quickly and in a non critical application only.
 
Mark,

did you ever think about just hooking up to the trailer and pulling it out of the way so you could flop the tree ? /forum/images/graemlins/9lame.gif j/k I've used the DWT before and love it. Like Lumberjack said, it is great in blow overs and storm situations

rob
 
Nice work with the DWT, Mark! But for us to have used it with my recent large hung tree, I'd have needed 400 feet of line and would have had to reclimb the spar trees to untie the ends. Even then, I don't think we could have lifted the tree. So, we cut it off the stump. On that tree and this one pictured below, we had both the GRCS and Hobbs lifting, and the trees were too heavy without DWT use, so we cut them off at the stump.

IMG_8851_resize.jpg


IMG_8861_resize.jpg


IMG_8863_resize.jpg


IMG_8864_resize.jpg
 
Yeah, the rope needed is a down side. But still worth it on some jobs. I have a 300' roll of 15mm endurabraid (25.5K#) for jobs like that. Great stuff.

Cutting a tree off at the base when you can't lift it is a perfect way to deal with that Roger. Very smart, but oh so sketchy at times. You need to plan for movement in any and all directions and even still you may get a surprise. /forum/images/graemlins/shocked.gif

Nice work as usual Roger.


Carl, ooops- my bad!
 
Its all good Mark, dont let it happen again /forum/images/graemlins/peace.gif /forum/images/graemlins/beerchug.gif /forum/images/graemlins/grin.gif
 
You must log in or register to reply here.

New threads New posts

Back
Top Bottom