Cinderellas of the fleet . o overcome these difficulties. Itwas installed on the starboard side directly opposite the S. C. more accurate, was heavier and much more elaborate. It wasconstructed with Ki ears, eight on the right side and eight on the left, allon the bottom of the tube and all connected by passage of equal lengthto the stethoscopes. The principle of the ears equi-distant from the listeners ears wasthe same as in the S. C. tube. The advantages of the M. B. werethat water noises had much less effect on it and that if there weremore than one sound, all but one could be cut
Cinderellas of the fleet . o overcome these difficulties. Itwas installed on the starboard side directly opposite the S. C. more accurate, was heavier and much more elaborate. It wasconstructed with Ki ears, eight on the right side and eight on the left, allon the bottom of the tube and all connected by passage of equal lengthto the stethoscopes. The principle of the ears equi-distant from the listeners ears wasthe same as in the S. C. tube. The advantages of the M. B. werethat water noises had much less effect on it and that if there weremore than one sound, all but one could be cut out provided they weremore than .30 degrees apart. With the S. C. any sound in the circle of the horizon could beheard while the M. B. worked more as a telescope to concentrate onone spot. Both of these principles, by the way, were employed in thelater German periscopes which were so constructed that the same in- TllK C1.\DER1-:LL.\S Ul THE ILEKT 1?> STETHESCOPE WHEEL FORREVOLVING TUBE GRADUATEDDIAL FOR READINGBEARINGS. A-B HOLLOW RUBBER EARS C - BRASS PIPE D - SMALL BRASS TUBES Diagram of the S. C. Tube. strument gave a complete view of the horizon and an enlarged sectionof any portion of it at the same time. The ability of the M. B. to eliminate undesirable noises is ex-plained by the fact that a sound coming from the sides would strikethe nearest ear first, then the next, and the next, and so on, and by thetime it got to the main channel of the instrument would be confusedand blanketed by itself. Supposing the instrument were set at zero,only sounds coming from the sector between 345 degrees and 15 de-grees and those from the opposite sector between 165 degrees and 105degrees would be heard at all. It took somewhat longer to search thecomplete circle with the AI. B. tube but its possibility for accuracywas much greater although I believe on some boats it was seldom usedbecause of its complicated construction and susceptibility to leaks. The K Hydrophone Submarines took a
Size: 1427px × 1752px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1920, bookidcinderellaso, bookyear1920
