How is the power of jet engines determined and how does it compare to the horsepower in piston engines?

Is there a formula to convert jet power to horsepower as we know it?

3 Responses to “How is the power of jet engines determined and how does it compare to the horsepower in piston engines?”

  1. VIRDS  on August 28th, 2013

    its all in bhp

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  2. ag_iitkgp  on August 28th, 2013

    Jet engines are tested in windtunnels.

    Horsepower is an unit of power and jet engines can also be rated in terms of it. Jet engines are much more powerful than piston ones.

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  3. navyhm1983  on August 28th, 2013

    Horse power can be used for both it is a value given to the amount of energy needed to perform (x) amount of work per second.
    I believe you are more interested in thrust, which is the forward propulsion of the jet engine.
    That would go more towards ft/lbs.

    One extra little known tid bit. The super jet engines like on the C-5 military transport uses some water injection on take off. This is what causes the dark exhaust you see.

    If I remember correctly when water flashes to steam it has a 1:26 pressure expasion rate.
    As you can see this has a significant impact on the amount of thrust for the engine as well as a cooling effect.

    And of course the lift is all by design of the wing. If you took the wings off of a plane it would never get off the ground…

    But it would make one fast car !!!

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