Tuesday, March 15, 2011
Building ‘Sharpy’ Part 41
The saga of building the keel weights continues. I managed to find an hour-and-a-half for cutting more lead laminations. In fact, I ran out of lead after making a grand total of 28 pieces. Altogether they weigh 23 lbs – that’s according to the bathroom scales, which may not be accurate. 23 lbs is 10.43 kilos, and the total nominal weight of one roll of 6 metres of 6 inch Code 3 lead is 13 kilos; therefore the leftovers approximately weigh 2.57 kilos, i.e., 5.7 lbs. That’s quite a bit of wastage, but nothing can be done to make it any less.
From a total of three rolls of lead I should be able to make 84 laminates, each about 1.5 mm thick, giving a final thickness of 126 millimetres, which is 4.96 inches. The plans show the port hand weight is 2 and 3/16 inch thick and the starboard weight is 2 and 5/8 inches thick, giving a total width of 4 and 13/16 inches. In theory, this means I should have enough lead to finish the job.