![]() ![]() These analyses were invariably characterized by comments such as, “extensive brittle fracture”, “indicative of brittle cleavage type failures”, or “highly notch–sensitive”. On several occasions of simificant shell damage, the oppotunity was taken to perform metallurgical examination on cropped-out hull plate. Shell structural failures experienced by icebreakers, principally Wind Class ships, had always been cause for concern. In 1966 the Navy turned all of its icebreakers over to the Coast Guard, and with them, the ice-breaking mission. In addition the Labrador was built by the Canadians. ![]() These were the Staten Island, Northwind, Eastwind, Southwind, Westwind and the US Navy Burton Island and the Edisto. Their hull was very strong with a top speed of 16.8 knots and they were capable of moving up to 13 feet of ice. The Wind Class icebreakers were built as a line of diesel electric-powered icebreakers. These were considered warships and were equipped with twin five-inch gun mounts. Seven such icebreakers were built for the US Navy and the US Coast Guard. At the time of construction, the Wind-class icebreakers were the most powerful and most advanced icebreakers in the world. ![]()
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