float get_length() const { return length; }
float get_width() const { return width; }
float get_height() const { return height; }
const AxleArray &get_axles() const { return axles; }
const Axle &get_axle(unsigned) const;
float get_length() const { return length; }
float get_width() const { return width; }
float get_height() const { return height; }
const AxleArray &get_axles() const { return axles; }
const Axle &get_axle(unsigned) const;