why does this 1986 steel Junk have holes in rudder?

Discussion in 'Boat Design' started by Squidly-Diddly, Dec 18, 2011.

  1. Squidly-Diddly
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    Squidly-Diddly Senior Member

  2. hoytedow
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    hoytedow Wood Butcher

    Maybe it was too big and this was the easiest way to reduce surface area?

    Or termites.
     
  3. michael pierzga
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    michael pierzga Senior Member

    aww jeez...dont you know anything !!!.. The two obvious technical reasons for holes......first, its cheaper to antifoul because of the reduced surface area and secondly , fish on port side can fearlessly crack jokes and tell sea stories with their mates on starboard side without swimming all the way around the rudder, huffing and puffing, exposed to young boys with nets.
     
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  4. Submarine Tom

    Submarine Tom Previous Member

    To make it lighter?

    Gosh, they're not even holes, they're diamonds!

    -Tom
     
  5. Angélique
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    Angélique aka Angel (only by name)

    Think Quest ---> Rudder
    Wikipedia Junk
    Wikipedia Rudder
    Google "fenestrated rudder" for more info...

    Cheers,
    Angel
     
  6. hoytedow
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    hoytedow Wood Butcher

    Thanks, Angélique!
     
  7. Angélique
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    Angélique aka Angel (only by name)

    Continuation of the first link above.....
    Cheers,
    Angel
     
  8. yipster
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    yipster designer

    some USA wwII divebombers also used ,,what was that word,, perforated arelons
    less power against force and more resoning like boundery layer flow, there is more on the I net
    smart boats those junks
     
  9. Angélique
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    Angélique aka Angel (only by name)

    She looks like a Colvin . . . .
    Cheers,
    Angel
     
  10. Angélique
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    Angélique aka Angel (only by name)

  11. Angélique
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    Angélique aka Angel (only by name)

    Ah, the one in post#1 is a little bigger and she's for sale . . . .

    [​IMG]

    Cheers,
    Angel

    PS - Yipster, the word was "fenestrated" - - ‘‘ pierced with one or more openings ’’ - ;)
    ---> fenestrae ~ windowlike openings
     
  12. tom kane
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    tom kane Senior Member

    Inboard powerboats use the same idea in the USA.
     
  13. Angélique
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    Angélique aka Angel (only by name)

    Besides the benefits of lighter steering I think fenestration also adds drag . . ? ?

    Cheers,
    Angel
     
  14. Squidly-Diddly
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    Squidly-Diddly Senior Member

    yeah, the For Sale is where I saw the pic, and I was wondering about drag.

    Seems like a 1986 steel boat should be able to turn the rudder without trouble or drag inducing holes.

    How can all those holes being blasted by prop NOT reduce steering and create drag VS solid rudder?
     

  15. rwatson
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    rwatson Senior Member

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