Originally Posted by
t1callahan
To clarify further, what you're saying is that If I'm targeting a CG that is 4.5" back from LE (near fuselage), I should not be concerned with the fact that at the point where the landing gear are, the CG is no longer at 4.5" back? Just measure near fuselage?
the line where the main gear crosses the fuse is a reference point and doesn't really matter how far out on the wings the gear are. So lets say the main gear is sitting on the center line for the main gear and for numbers sake it is 6 inches from the leading edge of the wing at the fuse. The 6 is just to give a perspective of where the main gear crosses the center of the fuse. The cg you say is 4.5 inches from the LE. The distance when you measure from the cg to the main gear line should be 1.5 and you would enter 1.5 as that distance between the main gear and the cg. the cg is 4.5 but the system only needs to know the distance between the gear and cg point. I always level the plane first before taking any measurements.