skywalker_2013.json

# This is an example plane coeffient file used in Ardupilot SITL.
# This allows ArduPilot developers to change SITL plane aerodynamic properties
# without having to change the hard-coded source code values directly.

# These coefficients are from last_letter skywalker_2013/aerodynamics.yaml.
# Thanks to Georacer!

{
    "s": 0.45,
    "b": 1.88,
    "c": 0.24,
    "c_lift_0": 0.56,
    "c_lift_deltae": 0,
    "c_lift_a": 6.9,
    "c_lift_q": 0,
    "mcoeff": 50,
    "oswald": 0.9,
    "alpha_stall": 0.4712,
    "c_drag_q": 0,
    "c_drag_deltae": 0.0,
    "c_drag_p": 0.1,
    "c_y_0": 0,
    "c_y_b": -0.98,
    "c_y_p": 0,
    "c_y_r": 0,
    "c_y_deltaa": 0,
    "c_y_deltar": -0.2,
    "c_l_0": 0,
    "c_l_p": -1.0,
    "c_l_b": -0.12,
    "c_l_r": 0.14,
    "c_l_deltaa": 0.25,
    "c_l_deltar": -0.037,
    "c_m_0": 0.045,
    "c_m_a": -0.7,
    "c_m_q": -20,
    "c_m_deltae": 1.0,
    "c_n_0": 0,
    "c_n_b": 0.25,
    "c_n_p": 0.022,
    "c_n_r": -1,
    "c_n_deltaa": 0.00,
    "c_n_deltar": 0.1,
    "deltaa_max": 0.3491,
    "deltae_max": 0.3491,
    "deltar_max": 0.3491,

    # The X CoG offset should be -0.02, but that makes the plane too tail heavy
    # in manual flight. Adjusted to -0.15 gives reasonable flight.
    # CGOffset is in X,Y,Z.
    "CGOffset": [
        -0.15,
        0.0,
        -0.05
    ]
}