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  1. ?

    Atmospheric Intake Valve on "Modern Engines"

    My guess would be "yes". I believe the reason they aren't used is because a cam operated valve allows control of the valves timing, like duration and overlap etc etc.
  2. ?

    The Hobby~Machinist. The "Un"-Friendly Machinist Forum?

    At the bottom of their site is a 'Contact Us' link which will take you to a page with a form to fill. This when submitted will email the site Administrator directly. The form on that page even includes a 'Registration Problem' check-box. Thm:
  3. ?

    Measurement equipment

    I have one of these too.... actually, had. I dropped it from standing height onto the concrete floor of my workshop a few months ago. I almost cried. It has been sitting unused ever since, just can't bring myself to the point of throwing it out.
  4. ?

    YouTube Anonymous

    I LOVE the sound of 3-pots! You guys are right, that thing sounds amazing! I've loved the 3pot sound since a mate of mine owned one of these about 20 years ago: (sorry, it's not a plane... and it's not home-built, but it is an engine ;) ) http://www.youtube.com/watch?v=RkSuM1RAd4Y
  5. ?

    Tooling: what's really out there?

    Years ago I saw an amazing video of one of these 'Hexapod' machines milling a V8 block... can't find it now :( Best I can find is this: http://www.youtube.com/watch?v=NDzUiZsbQtw And here is a 'home made' version: http://www.youtube.com/watch?v=G_UmhUjZhNo...
  6. ?

    Blower for The Demon V8

    Yeah doesn't work for me either. You sure you've logged out of PB when you try this Steve? I'm guessing as owner you are still able to see the pic's on PB but no one else can.
  7. ?

    Edwards Radial 5 Build

    Hi Michael, Compression ratio is simply the total volume of the cylinder(+head gasket +combustion chamber etc etc) with the piston at BDC, divided by the total volume with the piston at TDC. Not sure about non-metric countries, but here in Australia on full size engines the measurement of the...
  8. ?

    Request to all members

    Guys, Steve explained why he uses a host rather than uploading them to HMEM in post #8:
  9. ?

    Blower for The Demon V8

    He's teasing us ;)
  10. ?

    Request to all members

    No way. But, If I didn't apologise up-front you can bet your last dollar someone would have had a cry over it.
  11. ?

    Request to all members

    Pardon my language, but it really really pisses me off when people do that!
  12. ?

    Metal Crumbles

    I've had similar results from a length of 'mystery metal', and the resulting surface finish was very poor. That stock has been moved to the scrap bin. Have you tried the tool on some Aluminium?
  13. ?

    Blower for The Demon V8

    **** in metal form.
  14. ?

    Unfinished gear wrench

    Pic's or it didn't happen :D That goes for you too Stan ;)
  15. ?

    Blower for The Demon V8

    Looking awesome Steve, love the pulleys. I wonder though if it would have been possible to machine one extra long rotor and then cut in half to make two rotors?
  16. ?

    PC based DRO?

    Hi Yuriy, great news. Please don't take my previous comment as criticism, I know exactly how it feels to have no play time :(
  17. ?

    PC based DRO?

    I was looking at Android DRO a few months back. I couldn't decide in which 7" tablet to buy. Was thinking about a Nexus7 32GB, which I could use for other things too(reading PDF's in bed etc) but it is pretty pricey, so decided to think about it some more. Thinking now I might just buy a cheapie...
  18. ?

    SOS SOS NGK CM-6 Spark Plug Source

    No Worries, glad I could help. Good news on shipping too, cheers. I've been meaning to place an order with S/S but just haven't got around to it.
  19. ?

    boilers

    I bought this book recently, I haven't finished it but already willing to recommend it: UK store: http://www.bookdepository.co.uk/Model-Marine-Steam-Stan-Bray/9781854862457 US store: http://www.bookdepository.com/Model-Marine-Steam-Stan-Bray/9781854862457 Edit: Can also recommend The Book...
  20. ?

    I may design an I.C. engine---

    The exhaust valve spring?
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