Ask yourself how you can have symmetric airfow around the fuselage when there is rudder applied.
By having the forces cancel out anyway. Equilibrium
is equilibrium regardless of how it is created. A horizontal component of lift to cancel the force contribution of the deflected rudder (which exists - see below). Thrust asymmetry to cancel the moment contribution.
That's the equilibrium situation I described above. Can you tell me why you consider it impossible?
No problems with lateral CoP or knife-edge flight. However, I
do have a problem with:
No force without sideslip. Rudder force not considered seperately as it is included in total side force.
That is only valid as long as the rudder is not deflected. Once the rudder
is deflected, the crude airfoil made up of the fuselage/fin (as viewed from above) will go from a symmetric one to a cambered one. While the above quote holds true for a symmetric airfoil, it does not for the cambered case when there
will be a force generated without any angle of attack (beta).
Heh, a thought goes out to newcrew who’s probably asking himself how he could create this monster through a simple question about a piece of yarn!
Regards,
Fred