Originally Posted by wonwinglo

The latest test paper issued by the civil aviation authority has some devious questions,this one caught my eye,I even queried it with them only to be told that it was written by a 20,000 hour pilot,the question is very relevant to large scale models,look at all of the options carefully before making your own decision-

Q3
Why is it that, when an aircraft is flown with an aft C of G
position, it is appreciably less stable in both pitch and yaw?
a. the C of G and C of P are too close together
b. the moment arm of the empennage is reduced
c. C of G makes no difference to stability
d. an aft C of G involves a higher angle of incidence and more
downwash over the tailplane