![]() ![]() We have, to some extent, the ability to repair metal fatigue. We also know that other metals, like iron and titanium, have a "fatigue limit" below which fatigue doesn't accumulate and these metals can endure infinite loading cycles. We know, for example, that metals like aluminum will always fail from fatigue given enough loading cycles, no matter how small the applied stress. Metal fatigue is understood because we have a mechanistic understanding of what it is, how fatigue accumulates, and how different metal crystal strictures respond to fatigue. Interesting that they were able to make the batteries neutrally pressured. It actually does have electric thrusters. The motors all drive propellers through gear boxes. Two of them provide horizontal motion forward and backward, two provide vertical motion either ascending or descending, and one is installed athwartships for turning. > The motors themselves are in five different locations. These motors are designed to operate in inert fluid (silicone oil) and are subjected to full ambient pressure during diving operations. > The propulsion system consists of five special General Electric 3-hp de motors. Each of the four battery tanks or boxes is pressure- compensated through the use of transformer oil and, therefore, during submergence the batteries themselves are subjected to full depth pressure.’ Three of the boxes are allotted for powering the craft's five 3-horsepower electrical propulsion motors and for providing power to the lighting systems. The primary 24 volt electrical system of TRIESTE is powered by 56 twelve-volt, 48 ampere-hour, lead-acid batteries located in four aluminium saddle tanks fastened to the top of the float beneath the superstructure.
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