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  • Jasonb
    Jasonb reacted to Bazzer's post in the thread Metal 3D print with Like Like.
    What is on the table (6 parts) is £1200 Timeline is probably 6 to 8 weeks for submission of final design.
  • Jasonb
    Jasonb replied to the thread Metal 3D print.
    I suppose it is a bit like the old traditional methods, yours is what might be expected from a good sand casting whereas Barrie's...
  • Jasonb
    Jasonb replied to the thread Upshur's opposed twin engine.
    Gordon confirmed it was 102 Deg not 105 5 Thou is a lot of clearance for a small engine. You are unlikely to get the duration of valve...
  • Jasonb
    Jasonb reacted to minh-thanh's post in the thread Upshur's opposed twin engine with Like Like.
    Simply - because : where one cam operates the exhaust valve on both cylinders and the other cam operates the intake valve on both...
  • Jasonb
    Jasonb replied to the thread Upshur's opposed twin engine.
    If you want to see it as two cylinders this is what is going on. Just two normal 4-cycles 360deg of crank or 180deg of cam rotation out...
    • 20240703_200035.jpg
  • Jasonb
    Jasonb replied to the thread Upshur's opposed twin engine.
    I though this rang a bell I raised this issue weeks ago and said you looked to have about 50thou error due to deviating from the Upshur...
  • Jasonb
    Jasonb replied to the thread 36x60x54 Twin Tandem Mill Engine.
    The simplified design will be fine with bound sand, most commercial foundries here tend to use one of the airsetting binders for just...
  • Jasonb
    Jasonb replied to the thread 36x60x54 Twin Tandem Mill Engine.
    Thats considerably larger than what we are talking about here. That cylinder ends up 3.9" long Cores will be very small section and...
    • tandem 2.JPG
  • Jasonb
    Jasonb replied to the thread Upshur's opposed twin engine.
    Suggest you read the drawings again, cams are not at 90deg on the drawings I have You also did not follow them regarding the mounting...
  • Jasonb
    Jasonb replied to the thread 36x60x54 Twin Tandem Mill Engine.
    that is why I said they needed adjusting radially to suit bolt holes. It os equal side to side but spaced for either 3 or 4 holes But...
  • Jasonb
    Jasonb replied to the thread 36x60x54 Twin Tandem Mill Engine.
    I only said it was likely to have been clad, without seeing the rest of the drawings and no signs of fixing hole son this one it could...
    • stiffener.JPG
  • Jasonb
    Jasonb replied to the thread 36x60x54 Twin Tandem Mill Engine.
    Going to be a fun one to sand the 3D prints smooth on and then work out how many tiny loose pieces will be needed. A lot of the detail...
    • tandem.jpg
    • DSC03979.JPG
  • Jasonb
    Jasonb replied to the thread 36x60x54 Twin Tandem Mill Engine.
    That cylinder might be round but no way is it going to be an easy pull. It will need many loose pieces (retracts) as there are a lot of...
  • Jasonb
    Jasonb replied to the thread 36x60x54 Twin Tandem Mill Engine.
    If you go down the casting route are you able to make the patterns and core boxes? If not then forget casting. If you decide to...
  • Jasonb
    Have a word with ARC Eurotrade they do both the old and new belts for the X3. Not sure if they will ship to you though. You want the...
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