Peter
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Everything posted by Peter
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Any chance of a pic? Sounds interesting! I had a look at one of my 5 tonne ratchet straps today, the 5 tonnes is MBS, the SWL as a load tie down is 2.5 tonnes, but in a rigging situation you should apply a greater safety factor. In short, it wont be up to the job, but you already know that! Chain ratchet could work, but why not use the right tool for the job and get a sling?
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If it was fitted by a plumber it will almost certainly be an open system and will not require a pressure relief valve.
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Ah, this was on a closed system, like you have with a modern combi boiler, and I always ran it on quite a low pressure, just under 1 bar, with an expansion vessel to iron out the hot/cold fluctuations. I think the key is to have plenty of radiator as a heatsink in the system so it never gets too hot, and always run the circulation pump fairly high so heat doesnt build up in the back burner. Probably makes the log burner less efficient though. If I ever want to heat a whole house with a log burner again, I will be looking into warm air circulation rather than a radiator system.
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Supposed to. I did the first 2 metres in copper, then onto the plastic. Once the circulation pump was working it ran fine. To blow a hole in plastic pipe you need a fair pressure and about 120 degrees C, which is a tad warmer than i like my radiators!
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I always find the lowering part of the exercise a bit jerky on the winch drum with the grcs. The ratcheting drum of the Hobbs is a far superior animal for this particular job, you can whip all the slack out as the piece goes over, just as you say, but letting the piece run and bringing it to a controlled stop is much much easier.
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You can run a pressurised system with a safety valve or a traditional open system off a backboiler. The safety valve is fairly important though, I have a couple of sections of speedfit pipe with big holes in them to prove it!
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Nice work. Digital delay is a bitch! The first flying top is the most dramatic, but also the least likely to be captured for posterity!
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Time to cheese it up a notch. Bam! [ame=http://uk.youtube.com/watch?v=vCzNyx3L6Ys&feature=related]http://uk.youtube.com/watch?v=vCzNyx3L6Ys&feature=related[/ame]
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I was half expecting a link to your website Jamie! You should go round and set him straight, I mean the figure 8 thing is bad enough, but who in their right mind would want to climb on beal ergo?!
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That is a very dangerous assumption to make. Assuming it is SWL, the breaking strain at a safety factor of ten must be 50 tonnes. Even snatching a 250 kg lump is very unlikely to generate that force. If it is breaking strain 5 tonnes, then a SWL at a SF of ten brings it down to 500kg. Suddenly your 250 kg snatched lump generates enough Kn to destroy the cycles to failure, and you have an accident waiting to happen. If you are going to use kit to handle big loads, you must know what it is capable of. Assumptions will cause accidents.
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Haha, serious thread overlap going on here, I'v just replied to that in the other thread!
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You can always use a mechanical advantage system to pretension the lowering rope, or just get a couple of big groundies to hang off it! This is the one application where the Hobbs really rocks. Much better than the grcs or indeed any other lowering device out there.
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However the capstan is attached to the tree, and however much slack there is in the attachment software, you should still be able to pretension the lowering rope. Much easier with two groundies, but even if you have to pull down on the rope with one hand and make the first wrap with the other you should still be able to get it fairly tight?
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Depends on the bell in question. In the workclilmb, the start bell is rung by hand, the handsaw, limb toss and limb walk bells must be rung with a handsaw, the polesaw bell with the polesaw, and the landing station bell may be rung with any part of the body.
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Stein cheap and cheerful. Treetop bit more expensive but excellent quality. If you dont stick a silky in it it will last you for ages. You can get them from Trees Unlimited in Leeds.
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I have one of the t shirts, which I like a lot. Would like the jacket too, but they are a lot of cash, and I havent worn out the one I'v got yet!
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I'm going for alder.
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As a special order, delivered, from a florist, thats about right. If you want to check the pricing just look at the Interflora website.
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Nice one!
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Good point on the wellies, especially after some other sweaty-footed student has been wearing them all week the week before! I wore the welllies once, and then bought a pair of the old brown Stihl tractor treaded sole chainsaw boots. They were the mutts!
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I'd never go up a mountain if i needed that coat for it, i'd rather stay indoors with a nice cup of tea!
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And the matching trousers?
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You can body thrust pulling under the hitch with both hands while the pulley tends slack.
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Are you saying that the mk 2 is worse for rope damage than the mk1? I thought that lots of tiny spikes would strip the sheath under shock load, much like the kong ascenders, or any of the petzl cammed ascenders, rather than chopping it like the old version. That is what wild country seem to be saying. I need to buy one and have a play with it. Wild Country
