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Scuba Forum / General / May 2007Lead Backplates.
Well Scott, how about a run of these? Would have to be at least an inch thick to ensure stiffness, a little tin and antimony for strength, and no travel cuts, full size or tall only. Embossed with the title "solo diver". In recognition of his new "status" at rec scuba, I think you oughtta give Greg the first perfected one. > Well Scott, how about a run of these? > [quoted text clipped - 4 lines] > In recognition of his new "status" at rec scuba, I think you oughtta > give Greg the first perfected one. Are you implying that Greg is a gas bag or what? ;^) kula >> Well Scott, how about a run of these? >> [quoted text clipped - 6 lines] > > Are you implying that Greg is a gas bag or what? ;^) if you had the lead backplate and the brass backplate if you ever ran out of Barrett ammunittion you could melt them down and make your own > if you had the lead backplate and the brass backplate if you ever ran out > of Barrett ammunittion you could melt them down and make your own ?! >> if you had the lead backplate and the brass backplate if you ever ran out >> of Barrett ammunittion you could melt them down and make your own > > ?! It sounded funny when I wrote it > Well Scott, how about a run of these? > [quoted text clipped - 4 lines] > In recognition of his new "status" at rec scuba, I think you oughtta > give Greg the first perfected one. I wouldn't waste the lead. > I wouldn't waste the lead. Unless I'm wrong in my calculations, a 1" thick lead backplate would work out to about 68 lbs... Lead weighs about 1.4175 times the weight of stainless steel for a given volume (depending upon the particular alloy of stainless steel)... A cubic meter of lead weighs 11,340 kgs and a cubic meter of stainless steel weighs from 7,480 to 8,000 kgs... Using the 8,000 figure, we end up with 1.4175 times as much for a particular volume of lead vs stainless steel... Since a stainless steel backplate weighs 6 lbs for one that is 1/8" thick, the lead one 8 times as thick would weigh: 6 * 1.4175 * 8 = 68.04 lbs Not really good enough to do the job properly unless you combine it with a set of doubled Heiser 190s (62.3 lbs negative buoyancy *each* when full, 46.86 lbs negative buoyancy *each* when *empty*)... >> I wouldn't waste the lead. > [quoted text clipped - 13 lines] > a set of doubled Heiser 190s (62.3 lbs negative buoyancy *each* when > full, 46.86 lbs negative buoyancy *each* when *empty*)... Damn! That would solve my flopping around on the surface problem! > Damn! That would solve my flopping around on the surface problem! It would probably even prevent some people from going to the wrong boat after the dive... >>Damn! That would solve my flopping around on the surface problem! > > It would probably even prevent some people from going to the wrong > boat after the dive... I resent that remark. > > I wouldn't waste the lead. > [quoted text clipped - 13 lines] > a set of doubled Heiser 190s (62.3 lbs negative buoyancy *each* when > full, 46.86 lbs negative buoyancy *each* when *empty*)... Very close, it would weigh about 60.219. > I wouldn't waste the lead. for such a good cause? > > I wouldn't waste the lead. > > for such a good cause? 60.219 pounds would make a lot of bullets. I could have a lot of fun shooting them, and leave him to wither away in his miserable life. . <snip> wither away in his miserable life. It's all about perspective. kula > . > > <snip> wither away in his miserable life. > > It's all about perspective. I guess so. Life is going to pretty miserable for the next few weeks with way too much work, four more weeks of construction on my Culver City expansion, and a rushed business trip to the Windy City, but we head to Grand Cayman in mid-June for a week of warm water and a tech class, at which point my perspective will change (unless Janna gets bitten by another eel). >> . >> [quoted text clipped - 8 lines] > class, at which point my perspective will change (unless Janna gets > bitten by another eel). Love the Windy City: the lake front, museums, restaurants, shopping... Haven't been back in too many years. May is about the best time of year to be there: winter's over but not summer yet. kula > I guess so. Life is going to pretty miserable for the next few weeks > with way too much work, four more weeks of construction on my Culver > City expansion, and a rushed business trip to the Windy City, but we > head to Grand Cayman in mid-June for a week of warm water and a tech > class, at which point my perspective will change (unless Janna gets > bitten by another eel). Hey, she's still got one more hand left, right? <evil-grin> |
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