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Fuze Keeping Clock
The Fuze Keeping Clock (FKC) was a simplified version of the Royal Navy's High Angle Control System analogue fire control computer.〔''The Gunnery Pocket Book'', p. 153-154, paragraphs 432-435〕 It first appeared as the FKC MkII in destroyers of the 1938 Tribal class,〔Tribal Class Destroyers, Hodges, p. 27〕 while later variants were used on sloops, frigates, destroyers, aircraft carriers and several cruisers.〔Naval Weapons of WW2, Campbell, p. 19〕 The FKC MkII was a non-tachymetric anti-aircraft fire control computer. It could accurately engage targets with a maximum speed of .〔
==Operation==
The FKC received aircraft altitude, range, direction, and speed input information from the ''Rangefinder-Director'', vertical reference information from a ''Gyro Level Corrector'' and output to the guns the elevation and deflection data needed to hit the target, along with the correct fuze timing information, so that the shells fired would explode in the vicinity of the target aircraft.〔Hodges and Friedman, ''Destroyer weapons of WW2'', P51.〕 Most guns controlled by the FKC had ''Fuze Setting Pedestals'' or ''Fuze Setting Trays'' where the correct fuze timing was set on a clockwork mechanism within the AA shell warhead.〔Hodges and Friedman, ''Destroyer weapons of WW2'', P. 95-96.〕
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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