Alan Evans

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About Alan Evans

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    Stroud, Gloucestershire, UK

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  1. The vice squad clamps down on crime and criminals. Alan
  2. Is that an Oilite or sintered brass little end bush, or have you machined one from solid phosphor bronze? I had not seen the spacer system on the big end shells before...clever those Massey engineers. Alan
  3. Imagine no more. Using graphite and wax saves about half the energy when punching. I experimented with and without watching the pressure gauge on the press. Alan
  4. Well done! Congratulations on your new born! Alan
  5. Only possible with the MK llA/hotsy iterations. Alan
  6. How much headroom did you have above the boom when you lifted the hammer over the anvil? I had to make a special hook fitting to go on the end of a Hyab jib to get round a similar problem once. Looking good... Alan
  7. Not only a good start...pretty good finish too I would say. Pretty easy to find out if it will work. Depends on a lot of things like size of fire, height above fire, height of flue above roof ridge etc. The only thing you might be aware of it that the flue size is fairly small, you may need to do away with the chimney section and build it a bit larger. I have a stainless hood over my coke hearth. But then I have a gas furnace sitting under it on the hearth-which is rarely used. Almost always gas now. The stainless hood gets the heat up the chimney adequately, and has not deteriorated in the 20 years it has been in use. I got through two mild steel ones in the 20 years before that.
  8. I had a friend, Jamie McCulloch, who always introduced himself as ...a sculptor who builds bridges... In the late 80s / early 1990s he developed a system for structural design and was given computer time at Stirling University to explore it. He would make up a physical wire frame structure and then dip it in washing up liquid. He then digitised the surface form of the bubble. The bubble obviously linked the frame in the most efficient way possible under tension and so was the optimum lightweight skin under compression. It was a similar-ish concept to the sand bags and string system that Gaudi used to plot the angles of his tilting pillars in Sagrada Familia and the Colonia Guell church. He would attach both ends of the strings to various points on a board representing the pillar bases on plan of the building, tie sand bags of scaled weight to the appropriate place on the string length. Invert the board so that the strings dangled at the angle determined by the weight position and photographed it. He then plotted the angle of the pillars from the prints. It enabled him to use monolithic pillars at extraordinary angles rather than be limited to vertical masonry columns. He also used catenary curves for his arches everywhere...and there are reports that these were plotted empirically. They actually hung a chain and plotted the curve on a board then inverted it to build the arch. I think he may have then made the monumental leap to the 3 dimensional system from that. Alan
  9. The original script was apparently written by the actor who was used for many technical film voice overs...he didn't understand a word of what he was saying so came up with the script in order to share his puzzlement... I came across this on another forum this evening and thought it too good not to be shared. If you look at the associated YouTube films there are a lot of variations, including the original. Alan
  10. All good. Total agreement. Everybody else has given the good advice to see a I don't need own experience leads me to suggest seeing a physiotherapist. At an ABANA conference I attended in Saint louis Obispo at the age of forty, there was a session on backs and preventative measures to maintain them. The gist was that most people's backs can take abuse for forty odd years and then they complain. Three months after the conference mine went bang and I was bedridden. I was recommended a book called "Treat Your Own Back" by a New Zealand Physiotherapist called Robin McKenzie...ISBN: 978-0-9876504-0-5 I have been able to forge heavier pieces of metal after the event than I did didn't make me stronger but it did not hold me back. A lot of the problem is bending forward over the anvil for protracted periods or slumped in chairs over a desk or in the lose your lordosis, and the small of your back, which should be hollow, straightens out over the years. And as the back stiffens up with age, all the movement tends to take place between the fourth and fifth vertebrae which can lead to a bulging disc and pressure on the sciatica nerve and then muscle spasm to protect it. The solution to prevent and help that problem is to bend backwards often in order to regain flexibility over the whole spine so that each joint only has to move a little rather than one joint moving a lot. Hands on hips lean back and push hips forward is the intuitive response to a prolonged bent forward session and is the correct one. Do a wimps push-up...lie face down with your hands below your shoulders and leaving your tummy on the ground, arch your back by lifting your shoulders as high of the ground as you can without going into pain. Hold for ten seconds and relax and repeat a few times. Get a copy of the Mckenzie book if you can. You can check out the excellent and informative web site of one Sarah Key a physio based in Sidney who has developed similar exercise regimes based on the various permutations of back pain. Alan
  11. Just in case anybody has a use for one of these...Alan
  12. I heard a nice story...Two experienced old explorers/travellers happened to meet by chance around a camp fire in the Hindu Kush. Could of been Wilfred Thesiger and Eric Newby...They got to discussing necessary items for exploration/survival and came to the conclusion that a "spoon with a sharpened edge" was the only essential thing required. I would make them from stainless so that you do not taint the flavour of anything you put in your mouth, you can leave them straight from the hammer so they will be black for reenactment appearances sake. If you know how to make a leaf by necking down the stem and spreading the lump on the end, that is all you need to know about the forging process, form a rounded end instead of a point before spreading. Look up leaf forging on YouTube if that is your only source. A dimple in the end of a tree stump or a soft edged hardy hole will allow you to form the spoon bowl. Be careful to avoid working the material too cold initially and avoid using hard edged tools to prevent any cracks or crevices which are difficult to clean. Smooth refined surfaces are the best for food stuffs/hygiene. So a final pass over the item at black heat will reduce the scale and rough texture. If you are splitting the fork with a chisel a file is your friend to remove any flash in the Vee. Alan
  13. Slim Pickens...Yeehah! Alan
  14. You may be able to extrapolate from the foundation information that I posted here for the Massey hammers a while ago. Bob Bergman from Postville may be able to supply...or is a good bet for knowing where you may be able to get them. Alan
  15. Film? It came in a few centuries after blacksmithing...both totally outdated mechanical technologies! Alan