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JSBSim Aerodynamics: Difference between revisions
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→Frames: Fixed definition of Wind frame.
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Jonsberndt (talk | contribs) (→Frames: Fixed definition of Wind frame.) |
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* '''Body XYZ''' The body frame uses the X axis for forward and aft, with + to the front. The Y axis is side to side with + to the right. The Z axis is up and down, with + being up. The origin of this frame is the Center of Gravity (CG), about which the aircraft forces and moments are summed and the resulting accelerations are integrated to get velocities. | * '''Body XYZ''' The body frame uses the X axis for forward and aft, with + to the front. The Y axis is side to side with + to the right. The Z axis is up and down, with + being up. The origin of this frame is the Center of Gravity (CG), about which the aircraft forces and moments are summed and the resulting accelerations are integrated to get velocities. | ||
* '''Wind XYZ''' The wind frame X-axis points directly into the relative wind. The | * '''Wind XYZ''' The wind frame X-axis points directly into the relative wind. The Z-axis is perpendicular to the X-axis, and remains within the aircraft body axis XZ plane (also called the reference plane). The Y-axis completes a right hand coordinate system. The origin of this frame is the AeroRP. | ||
* '''Wind UVW''' This isn't really a frame, but it is the components of the wind velocity vector. The relative wind is imposed on the body frame using variables U,V, and W. U to represent the velocity of the wind flowing past the aircraft. U represents the wind blowing down the X or longitudinal axis of the aircraft. V represents the wind blowing down the body frame Y axis, that is, wind in your ear. W represents wind blowing down the body frame Z axis, or wind from above. | * '''Wind UVW''' This isn't really a frame, but it is the components of the wind velocity vector. The relative wind is imposed on the body frame using variables U,V, and W. U to represent the velocity of the wind flowing past the aircraft. U represents the wind blowing down the X or longitudinal axis of the aircraft. V represents the wind blowing down the body frame Y axis, that is, wind in your ear. W represents wind blowing down the body frame Z axis, or wind from above. | ||