What does it mean to be financially responsible? It's a complex question with a complex answer, but at its core is a simple truth: To be financially responsible, you need to live within your means. And to live within your means, you must spend less than you make.
longitudinal axis. A straight line running fore and aft through the center of gravity. It is horizontal when the airplane is in the rigging position. The aircraft rolls about this axis. See axes.
Definition of Axis. An Axis is a line about which a figure is drawn, measured, rotated, etc. The horizontal line and the vertical line on a coordinate plane are known as the X-axis and the Y-axis respectively.