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andypugh

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Everything posted by andypugh

  1. One possibility is to prevent cracking at the hub or spokes due to the outside getting very hot with the inside cold. (in that it is pre-cracked in a controlled way)
  2. Mag drills are available used on eBay for reasonable money. Reasonable enough that I have one. Though I do feel that the format of the Rotabroach Adder looks like it might be better in tight spots like old vehicle chassis. (I see some new ones for £450 on eBay today, which is a lot cheaper than normal, but still not cheap)
  3. It was 19-umpteen. A lot of engineering was based on rules of thumb and common beliefs. The baffle might have been intended to address a problem that did not exist, to address a problem that did exist, but ineffectively, or to address a real problem effectively. It is very unlikely that anyone then would have bothered to _test_ which of those it was. Even now, where a car company might have more test vehicles than a total pre-war production run, a lot of stuff gets put in on the basis of "it probably does no harm" or a quick back-of-the-envelope FE analysis.
  4. andypugh

    Karrier WDS

    Thanks, I will have a look next time I pass that way. I have a bit of an interest in Karrier as my dad worked for David Browns for 50 years and I think that they made their gearboxes. Talking of gears, if you need any then it might be worth talking to the company across the road, in case they know about Karrier and where they were made.
  5. andypugh

    Karrier WDS

    Well, I found a casino and a church in the same frame: https://goo.gl/maps/HRkGCDo3SWyFUX637 But following the road I only found Brook Crompton motors. (important in their own right)
  6. andypugh

    Karrier WDS

    Where is that? (I was brought up in and around Huddersfield, so I think that I know roughly where that is by the style of the buildings. I would guess somewhere in the wierd maze-like one-way system south of the University)
  7. Named after the family: https://en.wikipedia.org/wiki/John_Isaac_Thornycroft The shipbuilding part still sort-of exists, and built: https://en.wikipedia.org/wiki/Mirabella_V
  8. Did you consider that they might be chaplets?
  9. andypugh

    Karrier WDS

    If time is more important than money, RS components hold a surprisingly large selection of gland packings: https://uk.rs-online.com/web/c/pneumatics-hydraulics-power-transmission/power-transmission-gaskets-seals-packings/gland-valve-packings/?sort-by=P_breakPrice1&sort-order=asc&pn=1
  10. There are a fair few that are 50 years old. In 1955 the student union I would later join took on a 40 year old fire engine. When I joined it was 70 years old and the transit vans were fairly new. Now the fire engine is 100 years old and those union minibuses would be getting on for 40 years old (if they still existed) Time just keeps happening. (numbers for illustration only, some rounding has taken place)
  11. This line was a line of "lines" all lined up.
  12. How would you damage a ladder without damaging the paint?
  13. I was hoping (and rather expecting) that that would happen. If they are in the truck-stealing game then they are likely to know that there is no way to sell a steam wagon without it being recognised, and it makes most sense to abandon it and run.
  14. andypugh

    Karrier WDS

    Not really, it will blend in a lot better. I was joking about it being deliberate as I imagine it was serendipitous.
  15. andypugh

    Karrier WDS

    I love the attention to detail, especially the careful pre-rusting 🙂
  16. I found this rather interesting article with tables that allow you to make a good guess at the specification of a gear (including the pressure angle) using only a digital caliper. https://www.geartechnology.com/articles/0992/Base_Pitch_Tables/
  17. This Unic engine is different in detail, but does hint at the possible purpose of the extra cam follower holes. https://images.app.goo.gl/RNmcY5iHDjkEkm1F8 Though actually I don't know what those extra levers do. I did think possibly low-tension sparkers ("long mingling spark") but there are (maybe conventional) spark plugs. Albeit with weird HT connectors and possibly some levers.
  18. > I think that you are probably right. Despite her slight frame she is very strong, just the sort of person we need > to help put the axles and wheels on. She seemed to enjoy herself as well which was a bonus. Is she likely to end up studying at Imperial College? Or Southampton?
  19. If it's non-standard then re-cutting it to a slightly larger non-standard size might be an option. (I have the technology.... https://youtu.be/i4fTythQj5s?t=60 )
  20. I wonder if there is a way to print just a thin shell then fill with expanding foam? Or maybe use a very sparse porous fill pattern and pour in 2-part resin. Don't forget to leave a hole to glue a dowel in so that the moulder can insert a screw to pull the pattern out of the sand. (CAD makes it trivial to put that at the exact centre of gravity)
  21. andypugh

    Karrier WDS

    Ben found a source in India:
  22. andypugh

    Karrier WDS

    The 1916 Dennis fire engine has blocks of oak between the spring and axle, but these might not be original. I assume that the red fibre is somewhat thicker than the normal fibre washers? 3mm is available here: https://www.rhnuttall.co.uk/materials/vulcanised-fibre/
  23. Of course, you have a shaper with a slotting tool for it, so just need a dividing table that can be mounted at right angles to the shaper table.
  24. As-drawn the torque times the tangent of the angle of the face from a line from the centre point. (times µ) If you sweep the extension of the pawl face to the other side of the centre point, just a bit more than the weight of the pawl. I keep meaning to design and build a CNC slotting head for my mill. Perhaps this is the excuse?
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