question about pdracer

Discussion in 'Sailboats' started by sail102, Nov 27, 2011.

  1. sail102
    Joined: Nov 2011
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    Location: carbondale IL

    sail102 REBEL!!!!!!!

    if I made my pdracer 3 ft across rather than 4 would it still work?
     
  2. DCockey
    Joined: Oct 2009
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    DCockey Senior Member

    Yes it will sail but ......

    It will heel considerably more and be easier to capsize. In light air it may be slightly faster due to less wetted area. It will have less space for the crew.
     
  3. CutOnce

    CutOnce Previous Member

    Agree 100%

    And ....

    It will sit deeper in the water given the same crew weight, increasing wetted surface area somewhat - decreasing the beam increases immersed surface area and drag. Given the already very short length and limited hull speed, I would expect any possible light wind speed gains to be negated.

    You would also most likely move the waterline up on the hull enough to get the front and rear chines into the water as well.

    Net result: unless you are expecting crew weight to be far less than the design is intended for (and crew skill level to be higher) I would not recommend this.

    And it will no longer be a PDRacer ...


    --
    CutOnce
     
  4. gonzo
    Joined: Aug 2002
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    gonzo Senior Member

    It will not. 4' is the minimum required by the class.
     
  5. DCockey
    Joined: Oct 2009
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    DCockey Senior Member

    Will not sail, or will not be "class legal" if sail102 plans to compete in a PDRacer regatta?
     
  6. gonzo
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    gonzo Senior Member

    It will not be a PD racer. If you want to design a different boat then it is another story. What are you trying to accomplish?
     
  7. sail102
    Joined: Nov 2011
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    sail102 REBEL!!!!!!!

    you guys will probably think its pretty stupid but...

    it is geting cold out and so im building it in my basement and decreasing the beam wouldhelp to get it out:eek:
     
  8. gonzo
    Joined: Aug 2002
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    gonzo Senior Member

    It's OK to build something that fits in your basement. It looks like the door is, unfortunately really small. Basically, PD's have tight regulations as to dimensions. You may be better off building a canoe or kayak. They are narrow and may fit through the door.
     
  9. sail102
    Joined: Nov 2011
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    Location: carbondale IL

    sail102 REBEL!!!!!!!

    This is what the landing is like we measured and found that we couldn't get it out...



    Door
    _________________________________________________door




    _________________ stairs ____________
    } to }
    Basement
     
  10. daiquiri
    Joined: May 2004
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    Location: Italy (Garda Lake) and Croatia (Istria)

    daiquiri Engineering and Design

    Then wait to see what I'm going to write... ;)

    How about splitting the design longitudinally, building the two half-hulls in your basement and then joining and finishing them outside, when the weather gets a bit warmer?

    Cheers!
     
  11. PAR
    Joined: Nov 2003
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    PAR Yacht Designer/Builder

    The above comments are correct, but one other thing should be mentioned, and that's the lose a fair bit of stability if you decrease the beam. A PDR isn't very "thick" and it should be easily able to go through a doorway on it's rail.
     
  12. waikikin
    Joined: Jan 2006
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    waikikin Senior Member

    I think you can make 2 at 2' wide & join em to be class legal as I read it
     
  13. ancient kayaker
    Joined: Aug 2006
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    ancient kayaker aka Terry Haines

    PDR’s are rather tall, 18" nominal, but PDR rules allow you to do whatever you want 10" up from the bottom. If it still won’t go through the door on its ear, you can lower the sheerline, especially around midships. And a curved sheerline should relieve the somewhat uncompromising esthetics of the design.

    I like Daiquiri’s idea of making the hull in 2 halves, split down the center, but the joint would have to be reinforced internally since the rules do not permit external changes below the waterline and this could cause you to stumble during sailing.

    Another solution would be to go ahead and build it, but use only screws to hold it together in strategic locations so you can dismantle it, then screw and glue it together outside when the weather is warmer.
     
  14. DCockey
    Joined: Oct 2009
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    DCockey Senior Member

    Fundamental question for sail102, the original poster for this thread:

    Is it important to you that the boat which are you building be "class legal", perhaps to be eligable for any PDRacer regattas you might want to enter?
     

  15. sail102
    Joined: Nov 2011
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    Location: carbondale IL

    sail102 REBEL!!!!!!!

    im not building it to enter races I just want a boat:)
     
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