waterbuoy
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Everything posted by waterbuoy
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Just moving up and down on a rope can mean that the dynamic forces are up to twice that of the static force. The following is a video I took when operating a cableway that is used to measure river flow. I was winding a 50kg weight out and back, and had installed a calibrated load cell inbetween the weight and the suspension cable. Just moving out and back the maximum observed force was 81kg. When we changed mode and lifted/lowered the weight we quickly exceeded this, topping out at 88kgf (from a 50kg weight remember). Yes the SWL of the MEWP should take account of this, but whatever you do the factors of safety are going to be significantly reduced.
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I think you would have to be very careful about dynamic loading - even just stopping abruptly when abseiling will significantly increase the force on the MEWP compared to a static load (ie that which would arise when stood in the bucket/basket). Needless to say, you would also want to check with your insurers too.
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There may be a difference between 'top soil' and 'topsoil'?
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Rest assured it does not get any easier, just more expensive
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what could possibly go wrong!😬
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Thanks I'm about to build a small cabin in our garden for my wife to work in and, to make space, will be cutting down four sizeable larch trees - all >100' tall and dbh of around 18" to 2'. My pal has a woodmizer so I'll start doing some rough sums to see if it is a viable alternative to steel sheeting - if not then I will mill the timber to clad part of workshop that will be phase III of the planned works.
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A couple of questions from the 'interested but ill-informed': What are the longevity implications of sawn vs riven shingles; Might is be possible to make them from uk larch, and What is the minimum roof pitch they can be used on? Thanks
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They could, but in part it all comes down to what the consumer is prepared to pay. If UK apple growers are pulling out acres of apple trees because they can't afford to store the apples they grow, and the last year's crop are being left on the ground to rot, it is going to take some huge gonads to try and turn brownfield sites into something which makes economic sense for food production.
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I was thinking of Baldrick for some reason
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I think it is more because they are working with 'Virtual' AToNs. For example, by transmitting an appropriate signal on the AIS (Automatic Identification Syatem) 'system' they are able to replicate a 'virtual' lighthouse or navigation mark in the same way that a ship or other vessel is able to be represented on the AIS. Vessels within range pick up this signal on their transceivers and it then plots automatically on their electronic charts DGPS will still be needed by the vessels to plot their own position - the lighthouse authorities are simply keeping up with technology and, in so doing, ensure that their VAToNs are only received by those to whom they are directly rrelevant. I guess that in the long term there may be savings to be made, but the reality is that they are also having to maintain some of the physical AToNs to keep up with international committments etc.
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Part of my marine work includes overlap with the NLB (Northern Lighthouse Board) and yes, the vast majority of their lights are directional. However, anyone who has spent a night outside in the vicinity of a lighthouse will know that the light can be visible behind the itended direction - don't know why, maybe due to reflection of particles in the atmosphere? The evolution of AToNs (Aids to Navigation) is rapid at present - Virtual and Electronic means such as signals transmitted on AIS are expanding, whereas only last year the lighthouse authorities discontinued their Differential GPS service. I am a total luddite, and have always enjoyed looking at charts and maps, so was somewhat disappointed to hear that the UKHO is to discontinue printing paper charts. Anyhoo, my original point was/is that it just struck me as rather ironic that the first Dark Light Sanctuary to be declared in Europe was on an island which has a lighthouse on it - nothing more than that!
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I may be missing something here, but I see in the news that Bardsey Island (Ynys Enlli) has been awarded status as a dark sky sanctuary: Dark Skies: Welsh island is first sanctuary in Europe WWW.BBC.CO.UK Ynys Enlli, also known as Bardsey Island, officially has one of the best night skies in the world. Yet when I think of Bardsey I immediately think of the bloody great lighthouse that is stuck on the end of it: Bardsey Lighthouse | Trinity House WWW.TRINITYHOUSE.CO.UK
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More likely handbags at dawn!
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Was that prior to n APF show by any chance?
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Try a kilt?
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I very nearly replied something along the lines of 'anywhere between not very much and far too much' It will depend on many, many variables - access, amount of vegetation/trees, etc etc. Piccies would help others give you an idea. Welcome to the forum by the way!
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WRT other ongoing threads: Can you not persuade her she needs Yew?!
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So I have observed!
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Sorry but: All I know is that you can't make pancakes without breaking eggs!
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Is the outer tube cylindrical/round or oval? If the former could you not fabricate something out of standard section alloy tube if you have the drive shaft?
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WTF is this all about?: Roald Dahl: Rishi Sunak joins criticism of changes to author's books WWW.BBC.CO.UK A debate rages over changes to references to characters' appearance and weight in the author's works. Wokeism gone (even more) mad. Why on earth does the BFG having a black coat need to be 'corrected' FFS?
