def motor_resistance_from_no_load_current(
        no_load_current
):
    """
    Estimates the internal resistance of a motor from its no_load_current. Gates quotes R^2=0.93 for this model.
    Source: Gates, et. al., "Combined Trajectory, Propulsion, and Battery Mass Optimization for Solar-Regen..."
        https://scholarsarchive.byu.edu/cgi/viewcontent.cgi?article=3932&context=facpub
    :param no_load_current: No-load current [amps]
    :return: motor internal resistance [ohms]
    """
    return 0.0467 * no_load_current ** -1.892