how to calculate specific thrust - Search
  1. Glenn Research Center | NASA
    https://www1.grc.nasa.gov/beginners-guide-to-aeronautics/thrust-force

    Thrust Equation | Glenn Research Center | NASA

    • We can further simplify by absorbing the engine airflow dependence into a more useful parameter called the specific thrust Fs. Specific thrust only depends on the velocity change across the engine. Fs = F /(m do… See more

    How Is Thrust generated?

    Thrust is a mechanical force which is generated through the reaction of accelerating a mass of gas, as explained by Newton’s third law of motion. A gas or working f… See more

    Glenn Research Center | NASA
    Momentum

    From Newton’s second law of motion, we can define a force F to be the change in momentum of an object with a change in time. Momentum is the object’s mass m tim… See more

    Glenn Research Center | NASA
    Mass Flow Rate

    If we are dealing with a solid, keeping track of the mass is relatively easy; the molecules of a solid are closely bound to each other and a solid retains its shape. But if we ar… See more

    Glenn Research Center | NASA
    Pressure

    This is the dimension of a force. There is an additional effect which we must account for if the exit pressure p is different from the free stream pressure. The fluid pressure is related to t… See more

    Glenn Research Center | NASA
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    Table of Contents
    How Is Thrust generated?
    Momentum
    Mass Flow Rate
    Pressure
    Why is specific thrust important?
     

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  2. To calculate specific thrust, you can use the following formula1234:
    • Specific thrust (Fs) = Net thrust (F) divided by mass flow rate (m).
    • Net thrust (F) is the difference between gross thrust and ram drag.
    • Mass flow rate (m) is the total intake airflow.
    • Specific thrust is useful for analyzing engine performance and efficiency.
    Learn more:
    The specific thrust is calculated by dividing the thrust created by the engine by the mass flow rate of the air (meaning how much air is flowing through the engine in a given amount of time). If one were to compare just the thrust of two different jet engines, most likely, the bigger engine would create more thrust.

    | How Things Fly - Smithsonian Institution

    howthingsfly.si.edu/ask-an-explainer/how-specific-t…
    Specific thrust is the thrust per unit air mass flowrate of a jet engine (e.g. turbojet, turbofan, etc.) and can be calculated by the ratio of net thrust/total intake airflow. [1] Low specific thrust engines tend to be more efficient of propellant (at subsonic speeds), but also have a lower effective exhaust velocity and lower maximum airspeed.

    Specific thrust - Wikipedia

    en.wikipedia.org/wiki/Specific_thrust
    Using the fuel to air mass flow ratio f, we obtain: mdot e = (1 + f) * mdot 0 Now using a little algebra, we can define a new variable called the specific thrust Fs which depends only on the velocity difference produced by the engine: F / mdot 0 = Fs = (1 + f) * Ve - V0 A "specific" property does not depend on the mass of that property.

    Specific Thrust - NASA

    www.grc.nasa.gov/www/k-12/airplane/specth.html
    The general thrust equation is given just below the graphic in the specific thrust form. Fs = F / m = (1 + mf) * Ve - V0 where Fs is the specific thrust, F is the net thrust, m is the air flow rate through the engine, mf is the fuel-air ratio, Ve is the nozzle exit velocity, and V0 is the free stream velocity.

    Engine Thrust Equations - NASA

    www.grc.nasa.gov/WWW/k-12/airplane/thsum.html
     
  3. People also ask
    How do you calculate specific thrust in a jet engine?
    The specific thrust is calculated by dividing the thrust created by the engine by the mass flow rate of the air (meaning how much air is flowing through the engine in a given amount of time). If one were to compare just the thrust of two different jet engines, most likely, the bigger engine would create more thrust.

    | How Things Fly - Smithsonian Institution

    howthingsfly.si.edu
    What is the general thrust equation?
    The general thrust equation is given just below the graphic in the specific thrust form. where Fs is the specific thrust, F is the net thrust, m is the air flow rate through the engine, mf is the fuel-air ratio, Ve is the nozzle exit velocity, and V0 is the free stream velocity.

    Engine Thrust Equations - NASA

    grc.nasa.gov
    Why is specific thrust important?
    But by comparing the specific thrust of two engines, one can determine which one is more efficient, even if one engine is much larger than the other engine. Specific thrust is a way to determine the efficiency of a jet engine regardless of the size of the engine.

    | How Things Fly - Smithsonian Institution

    howthingsfly.si.edu
    How does specific thrust affect engine performance?
    Dividing the thrust required by the specific impulse will tell us how much weight flow of propellants our engine must produce. This information determines the physical size of the engine. There is a similar efficiency parameter called the specific thrust which is used to characterize turbine engine performance.

    Specific Impulse - NASA

    grc.nasa.gov
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  4. nasa.gov
    https://www.grc.nasa.gov/www/k-12/air…

    Specific Thrust - NASA

    WEBMay 13, 2021 · Dividing the thrust required by the specific thrust tells us how much airflow our engine must produce and this determines the physical size of the engine. There is a similar efficiency parameter called the …

     
  5. Omni Calculator
    https://www.omnicalculator.com/physic…

    Specific Impulse Calculator

    WEBEstimate how efficiently an engine generates thrust using the specific impulse calculator.

  6. nasa.gov
    https://www.grc.nasa.gov/WWW/k-12/a…

    Specific Impulse - NASA

    WEBMay 13, 2021 · Why are we interested in specific impulse? First, it gives us a quick way to determine the thrust of a rocket, if we know the weight flow rate through the nozzle. Second, it is an indication of engine efficiency. …

  7. Glenn Research Center | NASA
    https://www1.grc.nasa.gov/.../thrust-equations-summary

    Thrust Equations Summary | Glenn Research Center | NASA

  9. nasa.gov
    https://www.grc.nasa.gov/WWW/k-12/a…

    Engine Thrust Equations - NASA

    WEBMay 13, 2021 · On this slide we have gathered together all of the equations necessary to compute the theoretical thrust for a turbojet engine. The general thrust equation is given just below the graphic in the specific …

  10. MIT OpenCourseWare
    https://ocw.mit.edu/ans7870/16/16.unifi…

    UNIFIED PROPULSION 3 - MIT OpenCourseWare

    WEBSometimes the overall efficiency of aircraft engines is expressed in alternative parameters: specific impulse, I, and thrust specific fuel consumption, TSFC or just SFC. Both of these parameters have …

  11. Wikipedia
    https://en.wikipedia.org/wiki/Specific_thrust

    Specific thrust - Wikipedia

  12. Glenn Research Center | NASA
    https://www1.grc.nasa.gov/.../specific-i…

    Specific Impulse | Glenn Research Center | NASA

    WEBJun 24, 2024 · The result of our thermodynamic analysis is a certain value of specific impulse. The rocket weight will define the required value of thrust. Dividing the thrust required by the specific impulse will tell us …

  13. MIT - Massachusetts Institute of Technology
    https://web.mit.edu/16.unified/www/SP…

    UNIFIED PROPULSION LECTURE #1 - MIT

    WEBIn the first lecture we arrived at general expressions that related the thrust of a propulsion system to the net changes in momentum, pressure forces, etc. Now we will look at how efficiently the propulsion system converts …

  14. stanford.edu
    https://web.stanford.edu/~cantwell/AA284A_Course...
    [PDF]

    Lecture 2 Thrust Equation, Nozzles and Definitions - Stanford …

  15. nasa.gov
    https://www.grc.nasa.gov/WWW/k-12/airplane/rktthsum.html

    Rocket Thrust Equations - NASA

  16. Wikipedia
    https://en.wikipedia.org/wiki/Specific_impulse

    Specific impulse - Wikipedia

  17. How Things Fly
    https://howthingsfly.si.edu/ask-an-explainer/how...

    | How Things Fly - Smithsonian Institution

  18. MIT - Massachusetts Institute of Technology
    https://web.mit.edu/16.unified/www/SPRING/...

    14 . 1 Thrust and Specific Impulse for Rockets - MIT

  19. Qualitative Reasoning Group
    https://www.qrg.northwestern.edu/projects/vss/docs/...

    How do you calculate specific impulse? - Qualitative Reasoning …

  20. nasa.gov
    https://www.grc.nasa.gov/WWW/k-12/VirtualAero/...

    Specific Thrust - NASA

  21. nasa.gov
    https://www.grc.nasa.gov/WWW/k-12/airplane/turbth.html

    Turbojet Thrust - NASA

  22. Calculator Academy
    https://calculator.academy/thrust-calculator

    Thrust Calculator - Calculator Academy

  23. nasa.gov
    https://www.grc.nasa.gov/WWW/k-12/airplane/sfc.html

    Specific Fuel Consumption - NASA