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2. Steeple compound engine - Wikipedia

   en.wikipedia.org/wiki/Steeple_compound_engine

   Three cylinder engines also had an intermediate-pressure or IP cylinder, but these were less common than two cylinder engines. [i] In the tandem compound the cylinders are arranged end to end on a common axis (in this case, vertical) with both pistons mounted on the same rod and moving together. Each cylinder has independent valves and valve gear.

3. Uniflow steam engine - Wikipedia

   en.wikipedia.org/wiki/Uniflow_steam_engine

   The poppet valves are controlled by the rotating camshaft at the top. High pressure steam enters, red, and exhausts, yellow. The uniflow type of steam engine uses steam that flows in one direction only in each half of the cylinder. Thermal efficiency is increased by having a temperature gradient along the cylinder. Steam always enters at the ...

4. Compound steam engine - Wikipedia

   en.wikipedia.org/wiki/Compound_steam_engine

   There are many compound systems and configurations, but there are two basic types, according to how HP and LP piston strokes are phased and hence whether the HP exhaust is able to pass directly from HP to LP (Woolf compounds) or whether pressure fluctuation necessitates an intermediate "buffer" space in the form of a steam chest or pipe known as a receiver (receiver compounds).

5. Cylinder (locomotive) - Wikipedia

   en.wikipedia.org/wiki/Cylinder_(locomotive)

   The cylinder is made pressure-tight with end covers and a piston; a valve distributes the steam to the ends of the cylinder. Cylinders were initially cast iron, but later made of steel. The cylinder casting includes other features such as (in the case of Stephenson's Rocket) valve ports and mounting feet. [1]

6. Valve timing - Wikipedia

   en.wikipedia.org/wiki/Valve_timing

   With traditional fixed valve timing, an engine will have a period of "valve overlap" at the end of the exhaust stroke, when both the intake and exhaust valves are open. The intake valve is opened before the exhaust gases have completely left the cylinder, and their considerable velocity assists in drawing in the fresh charge. Engine designers ...

7. Poppet valve - Wikipedia

   en.wikipedia.org/wiki/Poppet_valve

   The word poppet shares etymology with "puppet": it is from the Middle English popet ("youth" or "doll"), from Middle French poupette, which is a diminutive of poupée.The use of the word poppet to describe a valve comes from the same word applied to marionettes, which, like the poppet valve, move bodily in response to remote motion transmitted linearly.

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   mail.aol.com/?rp=webmail-std/en-us/basic

   Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!

9. Piston valve (steam engine) - Wikipedia

   en.wikipedia.org/wiki/Piston_valve_(steam_engine)

   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.