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Thread: Keel Bulb ideas

  1. #1

    Default Keel Bulb ideas

    I've been looking locally for a weight to make a keel bulb for my Razor, but so far around here no one carries a torpedo sinker more than 4 ounces. I can find them on the internet, but the shipping cost is hillarious....

    Any other way to go with a keel bulb?

    Thanks,
    Justin
    Justin Valleau
    I thought I was smart once, but I learned different.......
    http://www.butterfliesandbirds.org/footystuff.htm

  2. #2
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    Default Re: Keel Bulb ideas

    Cast it - with normal care handling small quyantities of lead occasionally is less hazardous than crossing the street. Note the words CARE, SMALL and OCCASIONALLY.

    If this were not the case, everyone who workeed in a lead foundy 50 years ago would have been dead inside a month!

    A.

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    He who doesn't always looses

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  3. #3
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    Default Re: Keel Bulb ideas

    Justin,

    Don't know of lead sheet is readily available where you are - aka Flashing sheet. Many people cut the sheet to suitable shapes (kitchen scissors when the social advisor is not looking?) and epoxy together to make a bulb shape then after trials file smooth, fill with car body filler and paint.

    This is an easy way to make a bulb - and leaving a slot for the fin comes easy, too.

    Me, I fill a length of aluminium or copper pipe with lead, embellish it with pointy ends and call it a bulb, but also cast shaped bulbs in silicone molds too

    any of these work for you?
    andrew

  4. #4

    Default Re: Keel Bulb ideas

    Actually I've had a time finding much of anything Lead any more. I thought of flashing, but it's not used and wheel weights, but they are being made of some alloy now. Seems like Lead is bieng phased out around here....

    I'm sure I will find some sooner or later........
    Justin Valleau
    I thought I was smart once, but I learned different.......
    http://www.butterfliesandbirds.org/footystuff.htm

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    Default Re: Keel Bulb ideas

    Quote Originally Posted by jusval View Post
    Actually I've had a time finding much of anything Lead any more. I thought of flashing, but it's not used and wheel weights, but they are being made of some alloy now. Seems like Lead is bieng phased out around here....

    I'm sure I will find some sooner or later........
    Belt weights for scuba.. Try to find those supplied in heavy duty PVC sachets. Lots of very fine lead shot inside, which melts a lot quicker than the cast lead weights.
    Apsara ESP-67

  6. #6
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    Default Re: Keel Bulb ideas

    Please forgive the horribly commercial plug guys but...
    http://www.scalesailing.com/sskits3.htm
    Half way down the page.

    I recently used the same bulb halves with slots cut in each to take struts mounted in the fin bottom. The halves are epoxied together trapping the struts which gives me a 1/8" narrower bulb.

    Graham
    (still casting bulbs and still here, I just wish I could remember where here is?)
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  7. #7
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    Default Re: Keel Bulb ideas

    This may sound daft, but it is easy to cast lead sheet to the accuracy we require - not very high.

    Nail thin wood (1/8 ply) onto a plank of flattish planed wood so that it makes a wall round the area you want to have as sheet - I would suggest casting long thin strips about 1inch high and a foot long. Make sure the plank is dry. Level the plank reasonably and pour in lead to the top - you now have a molten spirit level! The lead cools very fast.
    Really keen casters might line the wood with aluminium foil

    Yes, the wood chars: Yes; the mold is expendable after 3 or 4 casts

    But if you are doing this you might prefer to cut a female shape into the wood and mold half the bulb at a time and cut out the sheet stage.
    I use thermalite block (foamed lightweight aggregate building blocks) and scratch out the half shape - then fill. Not complicated - make sure its dry before pouring.

    Or, as Graham says get one from a supplier
    andrew
    Did I mention moulds have to be dry?

  8. #8

    Default Re: Keel Bulb ideas

    Thanks for all the ideas. For me, the casting is out. I don't have a melting pot and my wife is adamant about using her stove. I love her cooking very much, so I leave her stove alone!
    I thought about the copper tube and filling it. I could do that. I also have seen the weight at Graham's site and most likely I will be doing that. I like the two piece design, since I am using a wood keel and I really like the looks of that bulb when it's done.

    I also wrote to an ebay seller and he will send me one 8oz. torpedo sinker for $1.35 and $4.00 shipping, so I may do that as well.

    I did try on my own, but it was a mess. I bought two 5 ounce sinkers from Gander Mountain (haeviest they had) and pounded them down to make them torpedo shape. Then I drilled the blunt ends and used a screw to put them together. I used two part epoxy when I put them together. I did some filing and got something of a torpedo shape. I thought it was going to work, but as I was handling it, I dropped it from about 3' and the epoxy joint broke and the screw loosened in the lead. Don't think that's sturdy enough for me, so I gave that up...... Really looked pretty poor anyhow....

    Thanks for all the help and information here!
    Justin Valleau
    I thought I was smart once, but I learned different.......
    http://www.butterfliesandbirds.org/footystuff.htm

  9. #9
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    Default Re: Keel Bulb ideas

    i do cast 6 and 8 oz torpedo bulbs.....
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    Marc

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  10. #10

    Default Re: Keel Bulb ideas

    Quote Originally Posted by marcsmith View Post
    i do cast 6 and 8 oz torpedo bulbs.....
    Thank you, I might need one in the near future. I just went with the 8 oz. torpedo sinker from a guy on ebay. $4.10 including shipping..... I think it will work for now and he's not too far away from here (Oklahoma).......
    Justin Valleau
    I thought I was smart once, but I learned different.......
    http://www.butterfliesandbirds.org/footystuff.htm

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