On Mar 16, 1:47 pm, Andrew Sarangan wrote:
On Mar 16, 3:41 pm, wrote:
On Mar 15, 10:57 pm, wrote:
I think the more bottom rudder you give in a turn, the more the nose
will appear to move lower against a given horizon. All the rudder does
is pull the plane around an axis from ear-to-ear.
The rudder is intended to control adverse yaw, not to turn the
airplane. Banking the airplane turns it. Some airplanes, the "idiot-
proof" ones, sometimes need no rudder at all in a turn.
Dan
Actually, I beg to differ. Banking rotates the airplane about its
longitudinal axis. Yawing rotates about its vertical axis. Neither of
these causes the airplane to change heading. It is the aerodynamic
forces that streamlines the airplane with the relative wind is what
makes it turn (ie weather vaning).
For comparison, think of the space shuttle banking or yawing in orbit.
This does not change its heading because there is no streamlining
effect.
http://www.av8n.com/how/htm/4forces.html#note64 Section 4.3
http://www.av8n.com/how/htm/yaw.html#sec-yaw-stability Section 8.2
The bank moves the airplane sideways. The fin, moved sideways,
points the airplane in the new direction. The rudder controls adverse
yaw, which tends to drag the nose away from the turn.
Dan