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2. Uniflow steam engine - Wikipedia

   en.wikipedia.org/wiki/Uniflow_steam_engine

   The Casablanca-class escort carrier, the most prolific aircraft carrier design in history, used two 5-cylinder Skinner Unaflow engines, but these were not steeple compounds. A non-compound Skinner Uniflow remained in service until 2013 in the Great Lakes cement carrier SS St. Marys Challenger, installed when the vessel was re-powered in 1950 ...

3. Uniflow engine - Wikipedia

   en.wikipedia.org/wiki/Uniflow_engine

   A uniflow engine is a piston engine where gas flow through the cylinder proceeds in a single unidirectional flow, without reversals between strokes. This gives thermodynamic advantages as each group of ports can stabilise at an equilibrium temperature , rather than being alternately heated and cooled.

4. Camless piston engine - Wikipedia

   en.wikipedia.org/wiki/Camless_piston_engine

   A camless or free-valve piston engine is an engine that has poppet valves operated by means of electromagnetic, hydraulic, or pneumatic [1] actuators instead of conventional cams. Actuators can be used to both open and close valves, or to open valves closed by springs or other means.

5. Piston valve (steam engine) - Wikipedia

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

   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 .

6. Engine configuration - Wikipedia

   en.wikipedia.org/wiki/Engine_configuration

   Similar to U engines, H engines consist of two separate flat engines joined by gears or chains. H engines have been produced with between 4 and 24 cylinders. An opposed-piston engine is similar to a flat engine in that pairs of pistons are co-axial but rather than sharing a crankshaft, instead share a single combustion chamber per pair of ...

7. Valvetrain - Wikipedia

   en.wikipedia.org/wiki/Valvetrain

   The common valvetrain configurations for piston engines, in order from oldest to newest, are: Flathead engine: The camshaft and the valves are located in the engine block below the combustion chamber. Overhead valve engine: The camshaft remains in the block, however the valves are located in the cylinder head above the combustion chamber.

8. Opposed-piston engine - Wikipedia

   en.wikipedia.org/wiki/Opposed-piston_engine

   A variation of the opposed-piston design is the free-piston engine, which was first patented in 1934. Free piston engines have no crankshaft, and the pistons are returned after each firing stroke by compression and expansion of air in a separate cylinder. Early applications were for use as an air compressor or as a gas generator for a gas turbine.

9. Stationary steam engine - Wikipedia

   en.wikipedia.org/wiki/Stationary_steam_engine

   Uniflow engines have admission valves at the cylinder heads and exhaust ports at the midpoint. When stationary engines had multiple cylinders, they could be classified as: Simple engines, with multiple identical cylinders operating on a common crankshaft. Compound engines which use the exhaust from high-pressure cylinders to power low-pressure ...