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  2. Mercury Marine - Wikipedia

    en.wikipedia.org/wiki/Mercury_Marine

    Alpha Ratio (lbs) Bravo One Ratio (lbs) Bravo Two Ratio (lbs) ... 1.81, 2.00, 2.20 (1224) ... MerCruiser sterndrives and inboards range from 135 to 430 horsepower ...

  3. Euler's pump and turbine equation - Wikipedia

    en.wikipedia.org/wiki/Euler's_pump_and_turbine...

    Euler’s pump and turbine equations can be used to predict the effect that changing the impeller geometry has on the head. Qualitative estimations can be made from the impeller geometry about the performance of the turbine/pump. This equation can be written as rothalpy invariance: =

  4. Centrifugal compressor - Wikipedia

    en.wikipedia.org/wiki/Centrifugal_compressor

    The simplest inlet to a centrifugal compressor is typically a simple pipe. Depending upon its use/application inlets can be very complex. They may include other components such as an inlet throttle valve, a shrouded port, an annular duct (see Figure 1.1), a bifurcated duct, stationary guide vanes/airfoils used to straight or swirl flow (see Figure 1.1), movable guide vanes (used to vary pre ...

  5. Blade solidity - Wikipedia

    en.wikipedia.org/wiki/Blade_solidity

    If an impeller has only a few blades (i.e a large pitch), it will result in less lift force and in a similar manner for more blades (i.e. very low pitch), there will be high drag force. Blade solidity should not be confused with rotor solidity, which is the ratio of the total area of the rotor blades to the swept area of the rotor.

  6. de Havilland Goblin - Wikipedia

    en.wikipedia.org/wiki/De_Havilland_Goblin

    The de Havilland Goblin, originally designated as the Halford H-1, is an early turbojet engine designed by Frank Halford and built by de Havilland. The Goblin was the second British jet engine to fly, after Whittle's Power Jets W.1 , and the first to pass a type test and receive a type certificate issued for an aircraft propulsion turbine.

  7. Francis turbine - Wikipedia

    en.wikipedia.org/wiki/Francis_turbine

    The best performance is seen when the head height is between 100–300 metres (330–980 ft). [2] Penstock diameters are between 1 and 10 m (3.3 and 32.8 ft). The speeds of different turbine units range from 70 to 1000 rpm.

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