what is the difference between center of mass and center of gravity, aircraft wise.?

Question

this in relation to physics or aerodynamics because i am working on a water bottle rocket project.

Answer 1

Because gravitational force is proportional to mass (provided you aircraft is small compared to the earth), the center of mass and the center of gravity are one and the same.

Answer 2

They're the same.

The only conceivable difference is that, generally in aeronautics, because the aircraft is symmetric, any lateral displacement of the center of gravity from the axis of symmetry is very small, and thus usually ignored. So often in beginner/intermediate aerodynamics books, you will see "center of gravity" defined only in terms of its longitudinal position, even though it probably has some small nonzero lateral position as well.

Answer 3

They are the same.