Increasing plane size in Gazebo

Hi, I am using px4 autopilot with gazebo simulator. I would like to increasing advaned_plane size to more realistic which is in sitl_gazebo-classic but it has a lot of parameter depends on each other such as mass, inertia, motor, CLa,CL0,CD0,AR etc. How can I do that? Thanks.

This documentation was really good:

I’m not sure where it went now.