Table by which to find the relative state of Piston and Exhaust Example from the Table.-Suppose an engine with a stroke of six feet, or 72 inches, and the steam cut off when the piston is one-third from the end of its stroke, the cover on the exhaust side of the valve being 1-32d of its stroke, the relative positions will be the following: In a line with 1-32d and under 1-3d is 113 and 073; therefore 113 x 728.136 inches the piston is from the end of the stroke, when the exhausting-port before the piston is shut, and 073 x 72 5.256 inches the piston is from the end of the stroke, when the exhausting-port behind it is open = Table of Cylinders, with proportionate strokes for Steam-engines of nominal horse-power; the dense steam for Condensing Engines being seven pounds per square inch. STATIONARY CONDENS- MARINE CONDENSING ENGINES. HIGH-PRESSURE, OR NON-CON- Table of Nominal Velocities for the Pistons of Steam-engines, with given length of strokes. MARINE ENGINES. HIGH-PRESSURE, OR NON- Length Number Velocity in feet per in feet and in. minute. per min. Velocity in feet per min. ·625 = One foot, or 12 inches the integer. 9166 11 inches. 4166 5 inches. 0625 = of inch. |