Do not forget the fuselage effect
Dear all
As far as I know the path of an object is defined by adding up all the forces at the CG. Its rotation by putting all the moments with ref to the same point, does not have to be the CG.
On the ground the reaction forces of the gear do not have a horizontal component so there is no shifting from gear towards CG as mentioned before.
When airborne there will be slip and the forces created by fuselage will play an important role.
It is therefore impossible to reason with rudder forces only when comparing VMCG and VMCA. That's what certification flights are all about. Don't worry be happy.
Last edited by Pitch Up Authority; 22nd Dec 2009 at 20:59.