I have been trying to model the pitching dynamics of a General Aircraft (Nelson : Flight Stability and Control) but during the modelling, I find that I need to use the Zδe which uses CZδe parameter, in the control matrix B but no where in Nelson a method has been provided to find it. Your help will be appreciated as I need to complete my work on an urgent basis. I am attaching a picture of the state space equations for your reference. Thank You![State Space Equations[![][1]]1]2


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The variation of Z-force with elevator deflection is simply the component in Z-direction of the lift force developed by the elevator. It is a function of:

  • Local Angle of Attack.
  • Elevator deflection angle.
  • Trim tab or stabiliser deflection.
  • Elevator surface area.
  • Local dynamic pressure at the elevator.

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