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Bill My mold produces an identical shaped weight (max 4 Kg, 8.8 l.b.) - perhaps a little over engineered. I obtained a scrapped cylinder of the same size as my twins and had the top and bottom cut off. Then sliced into quarters length-wise. Two quarters then welded together with a spacer of about 8 mm. Finally weld on end plates. I have a friendly buddy with machine shop facilities that did the hard work for me - thanks again Peter. In hindsight - would go with your elegant home made approach. However, my mold is so robust that I'll be passing it on as an heirloom :) Dave ---------- From: Bill Mee[SMTP:wwm@sa*.ne*] Sent: 05 January 1998 18:46 To: Jim Cobb Cc: David Shimell (shimell); Cavers List; Tech Diver Subject: Re: V-Weight Web Site Jim, When I built my original backplate V-weight mold I used plasticene clay to form the cavity. Using this method I was able to contour the shape of the weight to the curvature of the tank and in so doing obtain a slightly larger volume of ballast metal. After forming the positive I mixed up a displosable aluminum turkey broiler pan of plaster of Paris and pressed the clay weight shape into the liquid plaster until it set. The clay fell right out of the plaster mold and it was ready to use the next day. I have molded a fair number of weights and still continue to use this cavity mold. I have been able to obtain upwards of 8 lbs with this method. In my case I melt the lead in a cast iron frying pan on a single burner hot plate assisted with a bernz-o-matic torch. Bill Jim Cobb wrote: > > Dave- > > Well the one that I made was 7lbs, I was thinking that you could screw in > a couple of 1.5" wood dowels over the mounting holes and move the putty > further out towards the ends. The lead would flow around the dowels and > you could make a weight which could span the whole length of the > backplate, maybe get up to 10lbs or so. > > Jim > > On 1/5/98 12:00 PM David Shimell (shimell) wrote: > > > > >Jim > > > >Good idea - what is the maximum weight you think you can get in a > >P-weight? > > > >Dave > > > > ------------------------------------------------------------------- > Learn About Trimix at http://www.cisatlantic.com/trimix/trimix.html -- Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'.
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