rudder size

  1. Claudio Valerio Parboni

    Twin Rudder lead and sizing?

    Dear All, I am currently facing the task of sizing a twin rudder system for a sailing yacht. My current method has been to heel the boat at an expected heel angle (IE 20°) and establish an ideal value for lead, then size rudder area (projected on the heeled plane) based on said lead. I am...
  2. C

    Heeling at speed

    Hi. I have a plastik 910 space cruiser, built in Italy. She weighs 6 tons, length 31ft, beam 10.4ft and has twin 230 VMC diesels. She has a deep V flattening towards her stern. Most fuel efficient cruising is at 18knts, but tops out at 28 when fully loaded.When I first got her she had very poor...
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