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#1
May 8th 15, 07:55 PM
posted to rec.aviation.soaring
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Looking for a set of ASK-21 ballast weights
On Friday, May 8, 2015 at 2:48:19 PM UTC-4, Per Carlin wrote:
Look for a local foundry that can cast lead. Make a piece of wood in the correct shape and they can make a set for half the original price from AS. I use plaster to make molds, then melt lead fishing weights to make "weights". In this case, I would make a "wood blank" with the required dimensions (allowing a slight taper on the sides for a draft angle, lay the blank on a flat smooth surface (narrow side of the draft angle up)and pour plaster over the top of it & let harden. The draft angle eases removing the lead bit later & the mold should last for a number of casts. In Kirk's place, he just needs the dimensions so he knows how big to make the mold (including depth). 
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