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Thread: Federal 1500A's Bottom and Skeg Options

  1. #1

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    Federal 1500A's Bottom and Skeg Options

    I've read a lot on ski bottoms but still have a couple questions. I'm replacing ski bottoms on Federal 1500A's. Current bottoms are showing deep, long cracks and were done with (very heavy) 1/2" UHMW extended 2" out to be 12" wide, attached with countersunk machine screws. They had the center skeg removed and a small steel skeg bolted on the edge.

    Sounds like 1/4" is ideal for extending 2+" out, and 3/16" works for anything less. I'm thinking 3/16" extended 1 1/2". Should save quite a bit of weight.

    UHMW skeg seems the way to go, is there a problem just bolting a skeg on at the ski edge? or both edges? The aluminum seems thin where you would use self tapping screws or rivnuts to attach the center skeg.

    Thanks for any info!
    Likes stknrddr liked this post

  2. #2

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    Sasquatch,
    I did my 1500s a few years ago and it was one of the most rewarding mods I've done. Used 3/16 uhmw and riveted with 1-1/2" extension. I made my skegs with uhmw also and did use rivnuts with countersunk screws to attach. Easy to replace a skeg but still haven't had to. But we don't get the ski time like some guys here. It's wild how well they slide even on asphalt with no damage. Also cured the freezing down problem. It is a time consuming mod, use some of the screw type clecoes also as at the bend it will want to wrinkle. There is already some good threads here on the subject with pics. Again, when you first put them on, you will say why didn't I do this years ago!
    Blue Skies,
    Den
    If you get lost while flying, don't try hail a cop. Pick up the first railroad you find and hug it until you get somewhere.

  3. #3
    cubdriver2's Avatar
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    I did my 1500A skis with 1/8 uhmw almost 20 years ago. When I first did them I put the center steel skeg back on by tapping a 1/4 x 28 thread into the bottoms and use a flathead machine screw loctited. But I still would freeze down a couple times a winter so a couple years ago I removed the steel and changed the skeg to a 1/4 x1" strip of uhmw and put the screws a little closer together. Works fine. Problem is I still freeze down once in a while even though I let the skis cool after a long taxi and then pull the skis back into their tracks.

    Glenn
    "Optimism is going after Moby Dick in a rowboat and taking the tartar sauce with you!"

  4. #4

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    Thanks, was able to get some 1/4" UHMW pretty cheap so will be using that.

    Any paint recommendations?

  5. #5

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    Where do you buy UHMW?

  6. #6
    cruiser's Avatar
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    Quote Originally Posted by Sasquatch View Post
    Thanks, was able to get some 1/4" UHMW pretty cheap so will be using that.

    Any paint recommendations?
    Wetlander
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  7. #7
    Chicken Hawk's Avatar
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    Quote Originally Posted by RickA View Post
    Where do you buy UHMW?
    https://www.interstateplastics.com/U...SABEgLIGPD_BwE
    Thanks RickA, stknrddr thanked for this post

  8. #8

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    Thank you! Do I need to remove all the tunnel rivets and rivet thru those holes or can I leave them in and make another row of rivets about a 1/2 inch in full length on both sides to attach the plastic?

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