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  2. Normal shock tables - Wikipedia

    en.wikipedia.org/wiki/Normal_shock_tables

    In aerodynamics, the normal shock tables are a series of tabulated data listing the various properties before and after the occurrence of a normal shock wave. [1] With a given upstream Mach number, the post-shock Mach number can be calculated along with the pressure, density, temperature, and stagnation pressure ratios.

  3. Aerodynamic center - Wikipedia

    en.wikipedia.org/wiki/Aerodynamic_center

    The Static Margin can then be used to quantify the AC: = where: C n = yawing moment coefficient; C m = pitching moment coefficient; C l = rolling moment coefficient; C x = X-force ≈ Drag; C y = Y-force ≈ Side Force; C z = Z-force ≈ Lift; ref = reference point (about which moments were taken) c = reference length

  4. Stability derivatives - Wikipedia

    en.wikipedia.org/wiki/Stability_derivatives

    The stiffness does not only depend on the static stability term , it also contains a term which effectively determines the angle of attack due to the body rotation. The distance of the center of lift, including this term, ahead of the centre of gravity is called the maneuver margin. It must be negative for stability.

  5. Longitudinal stability - Wikipedia

    en.wikipedia.org/wiki/Longitudinal_stability

    [5] [4] The distance between the center of gravity and the neutral point is defined as "static margin". It is usually given as a percentage of the mean aerodynamic chord. [6]: 92 If the center of gravity is forward of the neutral point, the static margin is positive.

  6. Aircraft flight dynamics - Wikipedia

    en.wikipedia.org/wiki/Aircraft_flight_dynamics

    The expression to calculate the aerodynamic force is: = ... Difference between static pressure and free current pressure ... Static margin; Weathervane effect;

  7. Factor of safety - Wikipedia

    en.wikipedia.org/wiki/Factor_of_safety

    In engineering, a factor of safety (FoS) or safety factor (SF) expresses how much stronger a system is than it needs to be for an intended load.Safety factors are often calculated using detailed analysis because comprehensive testing is impractical on many projects, such as bridges and buildings, but the structure's ability to carry a load must be determined to a reasonable accuracy.

  8. Compositional data - Wikipedia

    en.wikipedia.org/wiki/Compositional_data

    The isometric log ratio (ilr) transform is both an isomorphism and an isometry where : ⁡ = ...

  9. Balancing of rotating masses - Wikipedia

    en.wikipedia.org/wiki/Balancing_of_rotating_masses

    Static balance occurs when the centre of gravity of an object is on the axis of rotation. [1] The object can therefore remain stationary, with the axis horizontal, without the application of any braking force. It has no tendency to rotate due to the force of gravity.

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