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Peter

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Everything posted by Peter

  1. Plastic shower curtain ring? Wasnt there a thread on on of the american forums about this?
  2. Looks good. Slightly nose heavy maybe?
  3. Was that with the winch or the bollard? I don't find the winch as smooth to lower on as the bollard or the Hobbs, but that might just be me. The winch probably is bombproof, but it feels a bit wrong to put big shockloads on a expensive Harken winch!
  4. Yes and yes.
  5. Yes, it was a little superfluous I felt, as was the redi, but hey ho.
  6. I'm not really sure what purpose it served, but it was compulsory to use it so I clipped it on. It was a fun climb.
  7. There was a sort of SRT line with a prussic on it set for that station.
  8. The clippy in thing is a re-direct, pre-set for all the climbers. Presume thats what you mean? The limbs walk is a length of polished western red cedar, slippery bugger, and you get the oscillations through it as well, you can trigger the buzzer by blinking while your on it.
  9. True, and there is no r in pedantic!
  10. Cool, I think you will be very happy together!
  11. I have used both, and for blocking down wood I would choose the Hobbs every time.
  12. Much easier to do with the Hobbs than with the GRCS.
  13. Me neither, but it is more about not destroying the cycles to failure by exceeding the SWL. I did strip all the bark off a lump of beech, 4 feet long by 3 feet diameter, snatched off onto a 19mm line. The skinned lump just pinged straight out of the rope and put a big dent in the lawn. The other point to remember is that the lower down the stem you get, the heavier the lumps and the less room the groundie has to let it run......
  14. I dont want to be doing any heavy rigging on the Harken winch, don't know about anyone else. If I was doing any snatching on the GRCS it would be with the bollard, which you cant pretension with the winch, cos the bollard is where the winch should be!
  15. If you have a higher anchor point to crane off from, yes. I'm talking about blocking down stems, which is much the same with Hobbs, GRCS, Portawrap or whatever. The only difference between the devices is that with the Hobbs and the Stein Dual its easy to pretension the lowering line.
  16. Yes, but how often do you snatch a 33kg log? How often do you snatch a 150kg log? Multiply the loading up on that and you are looking at 1095 kg peak force.....
  17. Yes, unfortunately the emergency load cell we had didnt permit the inclusion of a rigging block, so we were rigging off a shackle, which didnt really allow for a smooth lower. The demo was about worst case scenarios, can you be sure that the groundie will let it run perfectly every time, or will it get stubbed off 1 in a 100 times? Worth considering imo. Would be more than happy to do your scenario, maybe at another event this summer if you are up for it?
  18. 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.
  19. Comparing apples with pears there John. G50 spec chip, delivered to a power station, is currently around £70 a tonne I believe. Wet stringy tree surgeon's chip, full of leaf and rakings, collected from site or yard, is worth a fraction of that. If its composted or semi-composted, virtually worthless. Clean wood chip with no leaf, rakings, or logs in, is worth a bit more, but you still have to deduct the haulage from the collected price.
  20. 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.
  21. Imo the worst thing you could do to your lumbar region is to immobilise it in a big tight waist belt. Whatever harness you have, try to fit it so that it sits down on your hips and leaves your back free to move as it should. Obviously if you have back problems then talk to your chosen healthcare professional, but if you want to avoid problems then this is the way forward.
  22. Any luck Jonny?
  23. That sucks. What are you going to do?
  24. There have been plenty of tests done on hand spliced ropes btw, and in my opinion since the same process is carried out each time there is really no reason to suppose that a properly constructed hand splice will be any less consistant than a properly constructed machine buried hand splice.
  25. Because any material forced through the feed rollers will exert a twisting force on the main bearings, ok if your crane operator is gentle, but not worth the risk imo. Also smaller disc chippers tend to have easily broken switches and stop bars, which are expensive to replace. When you force material into a drum chipper, all the happens is it gets shoved under the drum, and since the drum has a bearing at both ends it is a much stronger design. Just a case of getting the right tool for the job really.

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