Rotor may refer to:
A pistonless rotary engine is an internal combustion engine that does not use pistons in the way a reciprocating engine does, but instead uses one or more rotors, sometimes called rotary pistons. An example of a pistonless rotary engine is the Wankel engine.
The term rotary combustion engine has been suggested as an alternative name for these engines to distinguish them from early (generally up to the early 1920s) aircraft engines and motorcycle engines also known as rotary engines. However, both continue to be called rotary engines and only the context determines which type is meant.
The basic concept of a (pistonless) rotary engine avoids the reciprocating motion of the piston with its inherent vibration and rotational-speed-related mechanical stress. As of 2006 the Wankel engine is the only successful pistonless rotary engine, but many similar concepts have been proposed and are under various stages of development. Examples of rotary engines include:
A turbine (from the Latin turbo, a vortex, related to the Greek τύρβη, tyrbē, meaning "turbulence"), is a rotary mechanical device that extracts energy from a fluid flow and converts it into useful work. A turbine is a turbomachine with at least one moving part called a rotor assembly, which is a shaft or drum with blades attached. Moving fluid acts on the blades so that they move and impart rotational energy to the rotor. Early turbine examples are windmills and waterwheels.
Gas, steam, and water turbines have a casing around the blades that contains and controls the working fluid. Credit for invention of the steam turbine is given both to the British engineer Sir Charles Parsons (1854–1931), for invention of the reaction turbine and to Swedish engineer Gustaf de Laval (1845–1913), for invention of the impulse turbine. Modern steam turbines frequently employ both reaction and impulse in the same unit, typically varying the degree of reaction and impulse from the blade root to its periphery.
Holy rider takes to the air
Holy rider please beware
Carry the news with care
Holy rider it's time to start
Holy rider brave in the dark
Though we are just a spark
Made up of many parts
Down from the hills
Everyone race
Witness the time
Heaven will weigh the heart of stone
Heart of stone
Watch it break
Break the heart of stone
Holy rider take to the air
Holy rider please beware
Carry the news with care
Promise we'll all be there
Different in shape
Colour of face
Equally bought
But heaven will weigh the heart of stone
Heart of stone
Watch it break
Break the heart of stone
Down from the hills
Everyone race
Witness the time
Heaven will weigh
Different in shape
Colour of face
Equally bought
But heaven will weigh the heart of stone
Heart of stone
Watch it break
Break the heart of stone
Heart of stone
Watch it break