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  1. Cogsy

    270 Offy

    I think you missed the point - look again at post #424 which has a picture of the actual rod from a full-size engine. The rod design is obviously staying as close to true scale as possible. As the full-scale engine was a well refined racing engine, I would say the rod design was optimised for...
  2. Cogsy

    LTD Stirling

    Although it's unlikely to make much of a difference on a tiny bearing like that, most bearings are only dimensionally stable to around 110 Celsius (230 ish Fahrenheit) and shouldn't be heated above that or they may permanently deform. SKF 'Explorer' bearings can handle a bit more (about 150 C...
  3. Cogsy

    Marks Holt 75

    I have started a new thread for Johns' Holt and cleaned this one up a bit. Please continue your story Mark - I've been following along and really looking forward to the completion.
  4. Cogsy

    Putting some grip (stippling) on an aluminium drive pulley.

    All snakes in Australia are protected species and it's illegal to kill them for any reason. I have a few living in my house - they make great pets, not smelly at all and don't eat much. Reasonably friendly beasts too. I haven't been bitten in weeks.
  5. Cogsy

    DEMON 2X

    It seems a lot of people use a similar method to you when 'seating' rings but industry suggests it is the opposite of what you want to do to actually get a well sealing ring. The combustion pressures are required to get the rings to 'bed-in' and wear into a good seal. Here's a couple of links if...
  6. Cogsy

    Putting some grip (stippling) on an aluminium drive pulley.

    If I'm only doing something like working on a car or fixing the mower, and it's a hot enough day, then the full uniform is a pair of stubbies, wife beater and thongs. If I'm machining or messing with heavy stuff I switch the thongs for steel caps and if I'm welding then I try and add a long...
  7. Cogsy

    Yet Another Webster Begins

    I was going to suggest the same tool Brian did (we know them as 'side-cutters' down here). Looking at the picture, I would have thought there was enough pin sticking out that the cutters wouldn't even need modifying. Many times I've used side-cutters to grab and manipulate heavy springs, mostly...
  8. Cogsy

    Chinese Vertical Hit and Miss

    Barely any running so far. I've been tied up with real life a lot lately. I have a friend (just the one!) who has the horizontal version and he's had that running for hours at a time without any noticeable loss of compression. He does put a few drops of oil in his fuel to keep it lubricated.
  9. Cogsy

    veterans day

    I think you'll find it was 11:00am precisely (Paris time) on the 11th of November 1918. Had the war finished in 1917 my great-grandfather would not have perished in it...
  10. Cogsy

    ??? Making Setups

    The internet archive supposedly considers itself a library and it holds many physical copies of books, both in copyright and out of copyright, which it digitally 'lends' to users. The way these digital copies are provided to users has long been a point of contention with publishers and copyright...
  11. Cogsy

    Chinese Vertical Hit and Miss

    I'm not sure that flash point has much to do with combustion performance (and my intuition, which is often wrong, suggests WD40 wouldn't burn all that well compared to petrol/gasoline). Anyhow, petrol/gasoline has a flash point around negative 40° Celsius so if flash point==combustability then...
  12. Cogsy

    ??? Making Setups

    I wasn't suggesting the link to the specific publication was breaching copyright, simply that the site itself is jam-packed full of material which is covered by copyright. Simply viewing the posted link will present the user with other "you may also be interested in..." materials which...
  13. Cogsy

    Acceptable castings from Kit suppliers.

    Charles has much more experience with this casting so I'd take his advice and all I can give is my impression - The surface finish on the first, except for the defect, looks good, but the blue one looks like something I would cast in my back yard (and then promptly remelt and try again).
  14. Cogsy

    1/3 scale Galloway construction

    Oops - I missed the original explanation in his post and I rescind my objection. Thanks for pointing it out George and feel free to continue on with the caps.
  15. Cogsy

    New ..

    It's looking great. Nearly time for start up?
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