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HACRA modification to speed up rudder install on Hobie  Bottom

  • Calling it a "HACRA", since it's 1) a hack, 2) on a Hobie and 3) idea from a NACRA. I really like the way that NACRA rudders are installed, with no fiddling around with rudder pins. Had some extra gudgeons and stainless rod laying around, so why not make my own? Pleae excuse the pics as this is before the pintles were cleaned up, welds ground etc.
    Getting ready to weld-
    https://www.thebeachcats.com/gallery2/main.php?g2_view=core.DownloadItem&g2_itemId=136722&g2_serialNumber=4

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    Chuck C.
    H21SE 408
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  • Cut apart and welding the bottom of gudgeon and only lightly tacking top (full weld won't allow rudder to slide all the way down properly)
    https://www.thebeachcats.com/gallery2/main.php?g2_view=core.DownloadItem&g2_itemId=136725&g2_serialNumber=4

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    Chuck C.
    H21SE 408
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  • Test setup to see if it works:
    https://www.thebeachcats.com/gallery2/main.php?g2_view=core.DownloadItem&g2_itemId=136738&g2_serialNumber=4

    --
    Chuck C.
    H21SE 408
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  • Measurements - the top one has to be shorter than the bottom to clear the hull lip:
    https://www.thebeachcats.com/gallery2/main.php?g2_view=core.DownloadItem&g2_itemId=136730&g2_serialNumber=4
    https://www.thebeachcats.com/gallery2/main.php?g2_view=core.DownloadItem&g2_itemId=136733&g2_serialNumber=4

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    Chuck C.
    H21SE 408
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  • On the hull -
    The first picture is of the T-nut kind of thing I used. It's not really a T-nut, but a stainless type of T-nut thing with 2 holes in each one. The idea is that I cleaned the paint off and gelcoat down, along with a a sightly sloppy smaller hole to receive the threaded part of the T. The slightly larger drilled hole is to accommodate thickened epoxy. To install, I fixed the T-nuts to the spring plate, then epoxied them in place to make sure they lined up right. I was sure to add a little Tefgel to the tip of the screws so they wouldn't get glued in. I cleared off a perfect circle using a forstner bit VERY CAREFULLY. The T-nuts got really cleaned up and roughed up with a dremel tool for some tooth for the epoxy to grab, along with those 2 holes that are made into the T-nuts.:https://www.thebeachcats.com/gallery2/main.php?g2_view=core.DownloadItem&g2_itemId=136741&g2_serialNumber=4

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    Chuck C.
    H21SE 408
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  • I wish my old 5.2 had the QR setup. I see Murray's has these for $20-30 ea, plus $10 for the tab. Wonder If I could weld an pin (or just put in a bolt/nut) to convert my original gudgeons to the modern style. Half the moving parts means half the slop.

    Terrible welds btw. jk.

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    Robert
    81' NACRA 5.2 "Chris's Flyer"
    Previously owned H18, Trac 14, G-Cat 5.0, H14T, H16, N5.0
    BYC, Mobile, AL
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  • And the final result:

    Worked nicely (I think...we'll see):
    https://www.thebeachcats.com/gallery2/main.php?g2_view=core.DownloadItem&g2_itemId=136746&g2_serialNumber=4

    The rudders snap on really nice/quickly. Very smooth, no binding and holds down nicely. I've taken to putting a drop or 2 of super glue to keep the bushings in the castings (not loosing them) as one or 2 are usually loose. No more ring clips and for the 2 hours of work, I figure I save like 15 minutes each time out and less likely to loose a pin, etc. Also, if it has problems - I just swap back...

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    Chuck C.
    H21SE 408
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