"Verbal" notes and sketches for marine engineers : a manual of marine engineering practice, intended for the use of naval and mercantile engineer officers of all grades, and students, and is specially compiled for the use of engineer officers preparing for examinations of competency at home or abroad . 6 BLADE PROJECTION 7. BLADE PROJECTION 8. PROJECTED BLADE AREA(ACTUAL rHBUST AOEA) Propellers 525 To find Taper in Boss.—Allow the taper of shaft hole in boss tobe not less than f inch per foot of length. Therefore, 25 feet x-75 inch = 1-875 inches taper,and II inches 1875 inches = 9-i2S inches
"Verbal" notes and sketches for marine engineers : a manual of marine engineering practice, intended for the use of naval and mercantile engineer officers of all grades, and students, and is specially compiled for the use of engineer officers preparing for examinations of competency at home or abroad . 6 BLADE PROJECTION 7. BLADE PROJECTION 8. PROJECTED BLADE AREA(ACTUAL rHBUST AOEA) Propellers 525 To find Taper in Boss.—Allow the taper of shaft hole in boss tobe not less than f inch per foot of length. Therefore, 25 feet x-75 inch = 1-875 inches taper,and II inches 1875 inches = 9-i2S inches diameter at small end, or say 9 inches. NOTE.—30 inches = 2-5 feet = length of boss. To find Dimensions of Key.—^The width and thickness of the keywhich secures the boss to the shaft are found as follows :— Rule.— Shaft diameter^.^^^-^^^^ ^^ ^^^6 Therefore, +-6 = 2-4 inches, or say 2.\ inches in Rule.— Width of key X-5=: thickness of , 25x-5—1-2 inches, or say i^ inches in thickness. To find Dimensions of Nut.—The diameter and thickness of thenut at back of boss are found as follows :— Rule.— Shaft diameter at screw x 1-5 = diameter of nut, therefore 8-5xi-5=i2f in. diameter at screw x-75 = thickness of nut, therefore 8-5 x-75=6^ in.
Size: 1675px × 1491px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, bookidverbalnotess, bookyear1917
