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  • Users: perky416
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  1. perky416

    Pressure vessel design

    Hi Guys, Im in the process of adapting the pressure vessel on my air rifle to increase capacity. Please take a look at the image attached, is it acceptable for a pressure vessel to step down in size from 23.5mm to 20mm, and then back up again to 23.5mm? The step down in size is where 2 halves...
  2. perky416

    M14 die cutting major diameter to 13.5mm

    Hi guys, Im trying to put an m14 x 0.5mm thread on an aluminium bar. I originally purchased a dye from china, used it and i found that it cut the major dameter of the thread to 13.5mm instead of 14mm. Thinking it was a faulty dye i got my money back and ordered another, this time from germany...
  3. perky416

    How do I calculate thread length for fitting at end of pressure cyclinder

    Evening all, I am in the process of designing a fill valve and regulator that screw into either end of a cylinder that holds 250 bar of pressure. The thread at both ends of the cylinder is M25 x 1mm. Does anybody have any idea how I would calculate the length of thread needed so the...
  4. perky416

    Home made regulator tester, how would I stop air leaking?

    Hi guys, I hope this is the correct place to put this. Been in engineering a fair few years however never really dealt with pressure so please bear with me. I am trying to put something together that can turn a screw at the bottom of a pressurised cylinder. I thought of a rod with a handle...
  5. perky416

    Carbon fiber thickness

    Hi everyone, Im going to have a bash at creating my own carbon fiber motorcycle fairings. My original fairings are made from 2mm thick abs plastic. I was just wondering what people thoughts were as to how thick I should make the carbon fiber to give it the same strength as the original...

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