Hobbs or GRCS

[bob]

Better to check Harken's spec's. I'm pretty sure that the winch feature isnt designed for ropes over 14. A 16 can be used and a rougher covered lowering rope like the orrible marlow braid actually winches quite well.

 

GRCS all the way.

 

we use 16mm no problems

[Paul Smith]

Yeah, 3/4 inch according to the spec!

[Rupe]

The grcs comes with a bollard too, and the bollard will definalty take upto 19mm ropes. The winch part will take up to 16mm. When I got mine I only bought a 16mm to start with and used that for years with no problems, but have now got 14mm and its much better.

 

Like Judge says, its a much smarter way of working, not necessarily bombing out the huge sections like you might with the hobbs but total control all the way.

 

The ability to draw the rope in and then let it out is great. You need the same groundie for a while to get used to it. I agree with the statement above that if you are workign with lots of new groundies and different poeple everyday then the hobss might be better.

[softbankhawks]

Paul, if they cost the same which one would you get?

 

Who believes that the GRCS is more cost effective in terms of speed and man power?

Minutes matter!

 

 

 

A visor plate coupled with the huge aluminium bollard for large snatches. It's feasible to chop and change the two throughout the take down.

[Peter]

Hobbs if you want to snatch lots of big timber, GRCS if you want one man winching and good all round performance.

 

Having just helped Alex Laver out with a demo on the forces generated by snatching lumps of timber, I will be rethinking my rigging kit a little and using cranes for big timber wherever possible.

[softbankhawks]

Hobbs if you want to snatch lots of big timber, GRCS if you want one man winching and good all round performance.

 

Having just helped Alex Laver out with a demo on the forces generated by snatching lumps of timber, I will be rethinking my rigging kit a little and using cranes for big timber wherever possible.

 

I agree with the cranes for big timber bit. What will you be changing from and too with the rigging kit.

What were you snatching in the demo? Do you have some figures?

 

Just to elaborate slightly on my earlier point, Harken recommend up to 14mm for the self tailing winch jaws. The larger rope recommendation comes from arborists and refers to the bend radius of the winch bollard.

 

Paul

[Peter]

A 33kg log, dropped approx 500mm, generated a peak load of 245kg on the rigging anchor point.

 

If I have any really big snatching to do, it will be with Reg's two pulley system, otherwise I shall make more use of vertical speedline or other non shock loading techniques.

[softbankhawks]

A 33kg log, dropped approx 500mm, generated a peak load of 245kg on the rigging anchor point.

 

If I have any really big snatching to do, it will be with Reg's two pulley system, otherwise I shall make more use of vertical speedline or other non shock loading techniques.

 

I see. Do you intend to get the twin bollard for the double snatch blocks or were you thinking of something else? I imagine it would be very tricky to lower onto two different sized bollards (grcs and portawrap for example).

 

I have never tried a vertical speedline. Shall have to do some research.

 

Paul

[High Scale]

Stupid question, with vertical speed lining, how do you slow the load down or do you bother?

[Paul Smith]

I think you just smash it out! The attachment should stop it bouncing through the Patio window!