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Recent content by peteobyrne

  1. peteobyrne

    Shaftless screw conveyor calculations

    I have had further info about this project and it seems that they might just be using us to get a cheaper price from their preferred suppliers so I think it isn't a go anyway. We are definitely talking about a shaftless screw (i.e. no shaft - screw sits down on UHMWPE liner and has no tail...
  2. peteobyrne

    Shaftless screw conveyor calculations

    Hi, I am interested in designing up a series of shaftless screw conveyors to convey after centrifuge (25% dry Solids) wastewater sludge and would like to know where to find the necessary calculations for power requirements etc. I have trawled through the internet and it seems that there isn't...
  3. peteobyrne

    Calculations for Stiffened alloy plate

    Thanks miecz, I figured it would be something like that. Quick and dirty is fine for this application. Cheers for the help. Pete
  4. peteobyrne

    Calculations for Stiffened alloy plate

    Thanks Bagman, I don't really know why I didn't think of that myself. How did you come up with a value of 16T though? Is this a standard assumption? Thanks once again for the help. Pete
  5. peteobyrne

    Calculations for Stiffened alloy plate

    Hi, I am a recent graduate and am designing a cover for a wood chip hopper which is inset into the ground. The cover is to be made from 8mm Alloy treadplate with 100x10 Alloy flat stiffeners welded in underneath it. The cover will be supported on all four sides and the worst case scenario will...
  6. peteobyrne

    Drag coefficient of tumbling cylinder

    Hi, I am needing to model the projectile motion of 1080 poison pellets which tumble through the air (rough surface, 20mm diameter and 20mm length) and cannot find any information about what the drag coefficient of these are through the air. Does anybody know where I could find the...

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