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Diagram of cylinder and piston valve. The valve is next opened by moving it to the right, allowing the clear space in the middle of the valve to align with the channel in the cylinder above it. Piston valves are one form of valve used to control the flow of steam within a steam engine or locomotive.
The steam needs to be fed into the end of the cylinder at just the right time in the cycle to push the piston in the correct direction. In the other direction, the steam needs to be allowed to escape from the cylinder. As the crankshaft rotates, the piston rod moves up and down (or side to side in the case of a vertical cylinder) as well as in ...
Over time, Mamod expanded its range to include models of road rollers, traction engines, steam wagons, steam locomotives and other steam-powered road vehicles. These models were primarily intended for the toy market and were designed to be user-friendly and operate at low boiler pressures for safety, although they were not precise scale models .
A live steam festival (often called a "Steam Fair" in the UK and a live steam "meet" in the US) is a gathering of people interested in steam engine technology. Locomotives, trains, traction engines , steam wagons , steam rollers , showman's engines and tractors , steam boats and cars , and stationary steam engines may be on display, both full ...
In small sizes (less than about 1,000 hp (750 kW)), reciprocating steam engines are much more efficient than steam turbines. White Cliffs Solar Power Station used a three-cylinder uniflow engine with " Bash "-type admission valves to generate about 25 kW electrical output.
Also, the steam passages were better streamlined for greater efficiency and, most importantly, the piston valves went up in size from 8 inches to 9.5 inches. In order to allow higher speeds, the diameter of the driving wheels was increased to 6 ft 9 in (2.06 m) (from 6 ft 6 in) and the cylinder diameters were increased by 1 ⁄ 4 in (6.4 mm). [ 9 ]
An indicator diagram is a chart used to measure the thermal, or cylinder, performance of reciprocating steam and internal combustion engines and compressors. [1] An indicator chart records the pressure in the cylinder versus the volume swept by the piston, throughout the two or four strokes of the piston which constitute the engine, or ...
GB 189718087 (A), 1897, Improvements in means for providing for the free circulation of air in steam cylinders when the pistons are running and the steam cut off; GB 189921940 (A), 1899, Improvements in feed water purifiers and heaters for steam generators; GB 189922137 (A), 1899, Improvement in rotary steam engines