Screw Propellers and Marine Propulsion

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J. Wiley & sons, 1895 - Propellers - 230 pages
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Page 92 - ... stream relatively to the ship in knots; the real slip, or part of that speed which is impressed on that stream by the propeller, also in knots ; and the constant 5-66/or sea-water, or 5-5 for fresh water.
Page 132 - The area of the circle described by the tips of the blades of a rotorcraft; similarly applied to propellers.
Page 95 - Fig. 2, and if we were to draw a line through the intersection parallel to the base, the height which would be thus cut off from the thrust ordinates would represent the deduction to be made from them in respect of constant or initial friction, and the remainders of the ordinates between this new base and the curve, would, as has been explained, be approximately proportional to the ship's true resistance.
Page 192 - ... is the product of the following factors : — I. The area of the portion of the ship's skin in question. II. The cube of the ratio which the velocity of gliding of the particles of water over that area bears to the speed of the ship ; being a quantity depending on the figure of the ship and the position of the part of her skin under consideration. III. The height due to the ship's speed; that is, (speed in feet per second)2 ei^ (speed in knots)2 or, 22-6 IV.

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