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  2. Union Pacific GTELs - Wikipedia

    en.wikipedia.org/wiki/Union_Pacific_GTELs

    The sides of the locomotive had numerous air intake louvers that could be opened and closed in varying patterns. UP 50 was a carbody unit with a B+B-B+B wheel arrangement – four two-axle trucks, with pairs connected by span bolsters. The turbine produced 4,800 hp (3.6 MW), of which 4,500 hp (3.4 MW) was available for traction.

  3. Shaker scoop - Wikipedia

    en.wikipedia.org/wiki/Shaker_scoop

    A Boss 302 engine with the optional factory shaker scoop. A shaker scoop (sometimes called a shaker hood scoop or a shaker hood) is an automobile term for an air intake for combustion air that is mounted directly on top of the engine's air cleaner and protrudes through a hole in the hood. Since it is fastened directly to the engine, it moves ...

  4. Hood scoop - Wikipedia

    en.wikipedia.org/wiki/Hood_scoop

    Functional hood scoop on a Subaru Impreza WRX. A hood scoop (North American English) or bonnet scoop (Commonwealth English), sometimes called bonnet airdam and air dam, is an upraised component on the hood of a motor vehicle that either allows air to directly enter the engine compartment or appears to do so.

  5. Velocity stack - Wikipedia

    en.wikipedia.org/wiki/Velocity_stack

    Short velocity stacks on a 302 cu.in. Ford FE engine in the tight confines of a Ford GT-40. A velocity stack, trumpet, or air horn [1] is a typically flared, parallel-sided tubular device fitted individually or in groupings to the entry of an engine's air intake system to smooth high speed airflow, and allow engine intake track tuning to incorporate pressure pulses created by its internal ...

  6. Ram-air intake - Wikipedia

    en.wikipedia.org/wiki/Ram-air_intake

    Ram-air intake on a Kawasaki ZX-12R. A ram-air intake is any intake design which uses the dynamic air pressure created by vehicle motion, or ram pressure, to increase the static air pressure inside of the intake manifold on an internal combustion engine, thus allowing a greater massflow through the engine and hence increasing engine power.

  7. NACA duct - Wikipedia

    en.wikipedia.org/wiki/NACA_duct

    Three intakes (facing right) on an engine cowling When properly implemented, a NACA duct allows air to flow into an internal duct, often for cooling purposes, with a minimal disturbance to the flow. The design was originally called a submerged inlet, since it consists of a shallow ramp with curved walls recessed into the exposed surface of a ...

  8. Crossflow cylinder head - Wikipedia

    en.wikipedia.org/wiki/Crossflow_cylinder_head

    A crossflow head gives better performance than a Reverse-flow cylinder head (though not as good as a uniflow), but the popular explanation put forward for this — that the gases do not have to change direction and hence are moved into and out of the cylinder more efficiently — is a simplification since there is no continuous flow because of valve opening and closing.

  9. Crankcase ventilation system - Wikipedia

    en.wikipedia.org/wiki/Crankcase_ventilation_system

    On slow-moving delivery vehicles and boats, there was often no suitable air slipstream for the road draught tube. In these situations, the engines used positive pressure at the breather tube to push blow-by gases from the crankcase. Therefore, the breather air intake was often located in the airflow behind the engine's cooling fan. [1]