Recent Content by Diamond Cutter

  1. Diamond Cutter
    Post

    Is there a simple relationship between prop rpm and boat speed?

    Definitely an engineers response Hi DC; you are absolutely correct in what you say. However, the information takes me no further towards my goal....
    Post by: Diamond Cutter, Jan 13, 2012 in forum: Props
  2. Diamond Cutter
    Post

    Is there a simple relationship between prop rpm and boat speed?

    Yes, I've already had the "overloaded propeller" message, but I persist... The prop can be a metre (39.29") in diameter; draft is the main limit,...
    Post by: Diamond Cutter, Jan 12, 2012 in forum: Props
  3. Diamond Cutter
    Post

    Is there a simple relationship between prop rpm and boat speed?

    Thanks, ST; I've realised you're right, and I've bitten the bullet and downloaded JavaProp and the associated manuals, tips and tricks, and now am...
    Post by: Diamond Cutter, Jan 12, 2012 in forum: Props
  4. Diamond Cutter
    Post

    Is there a simple relationship between prop rpm and boat speed?

    So, that's a NO then? Ah well... Thanks for the fast response, folks; I'd suspected the answer would be "no" but it's good - well, informative...
    Post by: Diamond Cutter, Jan 12, 2012 in forum: Props
  5. Diamond Cutter
    Thread

    Is there a simple relationship between prop rpm and boat speed?

    Hi guys; here's a question that's puzzling me, though the answer to it is probably obvious to all here; namely, how to calculate the required...
    Thread by: Diamond Cutter, Jan 12, 2012, 18 replies, in forum: Props
  6. Diamond Cutter
    Post

    Air battens on Junk rig?

    Thanks for the comments @ Barnian; Thanks mate, I'm hoping it'll work out the way it looks in my head. I confess, the first sight of a...
    Post by: Diamond Cutter, Oct 12, 2011 in forum: Boat Design
  7. Diamond Cutter
    Post

    Air battens on Junk rig?

    Pneumatic control links @ Squiddly-Diddly: I suppose you're asking mainly about the pneumatic control of sail batten shape? I have no pictures,...
    Post by: Diamond Cutter, Oct 12, 2011 in forum: Boat Design
  8. Diamond Cutter
    Post

    Air battens on Junk rig?

    Pneumatic control of sail shape Hi Barnian; that was my first post too, so I suppose we can feel our way through this together! I'll be using...
    Post by: Diamond Cutter, Oct 11, 2011 in forum: Boat Design
  9. Diamond Cutter
    Thread

    Air battens on Junk rig?

    Has anyone any experience with, or comments on, the use of inflatable air battens with a junk rig, to replace the usual timber, bamboo, aluminium...
    Thread by: Diamond Cutter, Oct 11, 2011, 8 replies, in forum: Boat Design