When rotating, the orientation of this axis is unaffected by tilting or rotation of the mounting, according to the conservation of angular momentum. Gyroscopes based on other operating principles also exist, such as the microchip-packaged MEMS gyroscopes found in electronic devices, solid-state ring lasers , fibre optic gyroscopes , and the extremely sensitive quantum gyroscope. Applications of gyroscopes include inertial navigation systems , such as in the Hubble Telescope , or inside the steel hull of a submerged submarine. Due to their precision, gyroscopes are also used in gyrotheodolites to maintain direction in tunnel mining. A gyroscope is a wheel mounted in two or three gimbals , which are pivoted supports that allow the rotation of the wheel about a single axis.
The Commanding Officer had abandoned his ship when it struck the reef, and had swum ashore, and was captured. His crew, consisting of one man, had abandoned ship at the same time. What was iodentified as his body drifted ashore the next day. A salvage party from the Submarinen Base was sent to Bellows Field. Army planes had bombed the submarine, doing no damage, but had broken her loose from the reef, allowing her to drift inshore. The sallvage pargy hauled the submarine in, secured her, and made an examination.
Midget submarine attack on Pearl Harbor The popular account of Pearl Harbor records that the attack started at hrs local time on 7th December when hundreds of Imperial Japanese Navy IJN aircraft appeared over the anchorage and started their attacks. This simplistic version of events suffices for school textbooks and Hollywood movies but the military engagements actually started nearly five hours earlier at hrs. And these first encounters were not against aircraft, but a midget submarine! In regards to midget submarines, Japan was at the cutting edge of technology with only Italy having similar midget submarines at this time which could be considered successful. These would be of a modified type that built on the experience of the first model and was closer to something that could be employed operationally.
A gyroscope in operation. Note the freedom of rotation in all three axes. The rotor will maintain its spin axis direction regardless of the orientation of the outer frame. A gyroscope from Greek gros, "circle" and skop, "to look" is a spinning wheel or disc in which the axis of rotation is free to assume any orientation by itself.