Friday, April 20, 2007

4/20/2007

Dear Diary:
Today we completed the ballast system. The tubing for it was 1.75 inches in diameter and 12 inches long.
Instead of one, long tube, it will consist of 2 separate tubes sitting on top of the three body tubes. Each tube will be made up of two ballast containers which are each 3 inches long, with a small, plastic sleeve to connect them. This small connecting tube will be sealed with silicone sealant. Over the connecting joint, there will be a larger plastic ring to ensure containment. The ballast tubes are made of a large, outer tube with two arcrylic bulkheads sealing it off, and with a smaller tube running along the top to allow the movement of air through and into the tube.

ballast tubes






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