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Trimming failed, now what? |
During September 2008 it became obvious that trimming the sub was not possible with the current location of things inside.
Issues:
The center of gravity and the center of buoyancy was ahead of the center of the ballast tank. Moving the center of gravity and the center of buoyancy aft to meet the center of the ballast tank was not possible, as the space inside the aft end was already filled up with foam and parts.
The ballast tank must be moved forward, thus also moving the air tank and WTC2 forward to accommodate this.
Water penetrated the WTC1 plug, thus destroying it. One pin was energized, so it was corroded extensively, and since the plug was sealed using epoxy, no repairs can be carried out. A new 25 pin male plug must be fitted.
Success:
The bow thruster worked great, especially when the sub was sailing either direction.
The prop. was perfect for the sub, and was quick and power full in moving the vessel.
Self righting of the vessel was fine.
Drain holes in the bottom of the hull was large enough to drain quickly when pulled out of the water.
Plan:
WTC2, air tank and the ballast tank must be taken out, and new brackets / bulkheads made. Before fitting anything, a new series of trimming must be carried out, making sure that the three centers meet. (Center of gravity, buoyancy and ballast tank.)
When ok, then the fitting can begin, and the electric cabling can be completed.
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