"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 . be heldor fixed up against the stern post at the same radius R, The newblade will tiicn have the correct pitch angle, and the studs may besciewed up. NOTE.—The foreg-oing method is necessary when the stud holes in the flangeare cut oval to allow of pitch variation. To find the Pitch when the Pro
"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 . be heldor fixed up against the stern post at the same radius R, The newblade will tiicn have the correct pitch angle, and the studs may besciewed up. NOTE.—The foreg-oing method is necessary when the stud holes in the flangeare cut oval to allow of pitch variation. To find the Pitch when the Propeller is in the position shown I (on the surface table or shop floor).—Fit up two set-squares and i, a horizontal piece of wood as shown, at a suitable radius R (say about two-thirds out from boss to give average pitch); then the piece of pitch P will be obtained by the vertical measurement, and the piece of circumference C by the horizontal or floor measure- ent. f And Rx 2 X 3-1416 = full circumference at radius R. To find corresponding pitch— As C : full circumference : : P : full pitch. NOTE. —If the blades have a varying pitch, repeat the above at two or threeradial positions, and take the mean of the two or three pitches so found as theaverage pitch. 530 Verbal Notes and Sketches. No. 13.—Fitting on a New Blade. handle. It will thus be seen that the engines always run in thesame direction. Blade Interference.—B> this is meant the effect produced by oneblade on another blade acting on the water in such a manner as tobreak up the surface, and thus cut out or rob the next blade of its
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Keywords: ., bookcentury1900, bookdecade1910, bookidverbalnotess, bookyear1917
