To Sum Up

Discussion in 'DIY Marinizing' started by DogCavalry, Oct 14, 2019.

  1. Ike
    Joined: Apr 2006
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    Location: Washington

    Ike Senior Member

    Certainly not. That's why 30-40 years ago max speed on production boats was 40-50 mph, but now you can buy production boats that do over 100. I'll not even get into what's happening in the racing world.

    {QUOTE] So it surprises me when folk get offended.[/QUOTE] When you question the competence of people who have spent a lifetime in this industry designing and building boats yes, they get offended. If you ask a question and you don't like the answer, it doesn't mean the answer is not correct.
    DogCavalry likes this.
  2. Mr Efficiency
    Joined: Oct 2010
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    Location: Australia

    Mr Efficiency Senior Member

    Dog Cavalry seems to be taking on the world with his boating endeavours, with his sea sled obsession, and now re-inventing marine power. If something is widely adopted, or not widely adopted, the most likely explanation is that practical experience has dictated it that way, not that there is some conspiracy to thwart novel ideas.
  3. BlueBell
    Joined: May 2017
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    Location: Victoria BC Canada

    BlueBell Ahhhhh...

    Enough talk DogC.
    "Talk's cheap until you get the bill."
    Build your seasled and put an automotive engine in it and post some pictures.

  4. gonzo
    Joined: Aug 2002
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    Location: Milwaukee, WI

    gonzo Senior Member

    "There’s an ideal rpm for any prop, at any advance velocity." That is fundamentally wrong. Propellers absorb a certain amount of power, which usually increases as the RPM increases. However, if the load is too high, the propeller will cavitate. In that case, the Blade Area Ratio (BAR) needs to be increased, but the pitch maintained. Seems like you are making statements without first researching state of the art engineering. Further, Ike did not evade the question, but pointed out the flaws in your reasoning. Personal attacks are unwarranted.
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