#motor  machine that converts other forms of energy into mechanical energy and so imparts motion
  supertype:  #machine  any mechanical or electrical device that transmits or modifies energy to perform or assist in the performance of human tasks
  subtype:  #electric_motor  a motor that converts electricity to mechanical work
     subtype:  #starter_motor__startermotor__starter__startingmotor  an electric motor for starting an engine
        subtype:  #kick_starter__kick_start  a starter (as on a motorcycle) that is activated with the foot and the weight of the body
        subtype:  #self-starter  an electric starting motor that automatically starts an internal-combustion engine
     subtype:  #synchronous_motor__synchronousmotor  electric motor in which the speed of rotation is proportional to the frequency of the A.C. power
     subtype:  #wiper_motor__wipermotor  electric motor that moves the windshield wiper
  subtype:  #engine  motor that converts thermal energy to mechanical work
     subtype:  #aircraft_engine  the engine that powers and aircraft
     subtype:  #automobile_engine  the engine that propels an automobile
     subtype:  #auxiliary_engine__auxiliaryengine__donkey_engine  a small engine (as one used on board ships to operate a windlass)
     subtype:  #generator  engine that converts mechanical energy into electrical energy by electromagnetic induction
        subtype:  #alternator  an old term for an electric generator that produces alternating current (especially in automobiles)
        subtype:  #dynamo  generator consisting of a coil (the armature) that rotates between the poles of an electromagnet (the field magnet) causing a current to flow in the armature
        subtype:  #magneto__magnetoelectric_machine__magnetoelectricmachine  a small dynamo with a secondary winding that produces a high voltage enabling a spark to jump between the poles of a spark plug in a gasoline engine
        subtype:  #turbogenerator  generator consisting of a steam turbine coupled to an electric generator for the production of electric power
        subtype:  #aerogenerator__windmill__wind_generator  generator that extracts usable energy from winds
     subtype:  #heat_engine  any engine that makes use of heat to do work
        subtype:  #external-combustion_engine  a heat engine in which ignition occurs outside the chamber (cylinder or turbine) in which heat is converted to mechanical energy
           subtype:  #steam_engine__steamengine  external-combustion engine in which heat is used to raise steam which either turns a turbine or forces a piston to move up and down in a cylinder
        subtype:  #internal-combustion_engine__ICE  a heat engine in which combustion occurs inside the engine rather than in a separate furnace; heat expands a gas that either moves a piston or turns a gas turbine
           subtype:  #diesel_engine__diesel__diesel_motor  an internal-combustion engine that burns heavy oil
           subtype:  #four-stroke_engine__four-stroke_internal-combustion_engine  an internal-combustion engine in which an explosive mixture is drawn into the cylinder on the first stroke and is compressed and ignited on the second stroke; work is done on the third stroke and the products of combustion are exhausted on the fourth stroke
           subtype:  #gas_engine__gasengine  an internal-combustion engine similar to a gasoline engine but using natural gas instead of gasoline vapor
           subtype:  #gasoline_engine  an internal-combustion engine that burns gasoline; most automobiles are driven by gasoline engines
              subtype:  #put-put__putput  (informal) a small gasoline engine (as on motor boat)
           subtype:  #outboard_motor__outboard  internal-combustion engine that mounts at stern of small boat
           subtype:  #radial_engine__rotary_engine  an internal-combustion engine having cylinders arranged radially around a central crankcase
           subtype:  #reciprocating_engine__reciprocatingengine  an internal-combustion engine in which the crankshaft is turned by pistons moving up and down in cylinders
           subtype:  #rotary_engine  an internal-combustion engine in which power is transmitted directly to rotating components
              subtype:  #turbine  rotary engine in which the kinetic energy of a moving fluid is converted into mechanical energy by causing a bladed rotor to rotate
                 subtype:  #gas_turbine__gasturbine  turbine that converts the chemical energy of a liquid fuel into mechanical energy by internal combustion; gaseous products of the fuel (which is burned in compressed air) are expanded through a turbine
                 subtype:  #hydroelectric_turbine__hydroelectricturbine  turbine consisting of a large and efficient version of a water wheel used to drive an electric generator
                    subtype:  #Francis_turbine  a type of hydroelectric turbine
                 subtype:  #impulse_turbine__impulseturbine  a turbine that is driven by jets direct against the blades
                 subtype:  #reaction_turbine  a turbine with blades arranged to develop torque from gradual decrease of steam pressure from inlet to exhaust
                 subtype:  #steam_turbine__steamturbine  turbine in which steam strikes blades and makes them turn
              subtype:  #Wankel_engine__Wankel_rotary_engine__epitrochoidal_engine__epitrochoidalengine  a rotary engine that is a four-stroke internal-combustion engine without reciprocating parts
           subtype:  #valve-in-head_engine  internal-combustion engine having both inlet and exhaust valves located in the cylinder head
     subtype:  #reaction-propulsion_engine__reaction_engine  a jet or rocket engine based on a form of aerodynamic propulsion in which the vehicle emits a high-speed stream
        subtype:  #ion_engine__ionengine  a type of reaction-propulsion engine to propel rockets in space; a stream of positive ions is accelerated to a high velocity by an electric field
        subtype:  #jet_engine__jetengine  a gas turbine produces a stream of hot gas that propels a jet plane by reaction propulsion
           subtype:  #ramjet_engine__ramjet__atherodyde__athodyd__flying_drainpipe  a simple type of jet engine; must be launched at high speed
           subtype:  #rocket_engine__rocket  a jet engine containing its own propellant and driven by reaction propulsion
              subtype:  #takeoff_booster__takeoffbooster__booster__booster_rocket__boosterrocket__booster_unit__boosterunit__multistage_rocket__takeoff_rocket__takeoffrocket  the first stage of a multistage rocket
              subtype:  #nuclear_rocket__nuclearrocket  a rocket engine in which a nuclear reactor is used to heat a propellant
              subtype:  #retrorocket  a small rocket engine on a larger rocket or spacecraft that is fired to slow or alter its course
              subtype:  #space_rocket__spacerocket  a rocket powerful enough to travel into outer space
              subtype:  #thruster  a small rocket engine that provides the thrust needed to maneuver a spacecraft
           subtype:  #turbojet_engine__turbojet__turbofan__turbofan_engine  jet engine in which a turbine drives air to the burner

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