On Thu, 02 Oct 2003 02:03:42 +0000, Dave Hyde wrote:

BD5ER wrote:

And you might need a bit more than normal dihedral..............

Oooohhh, good point. Anybody ever flown an airplane with 'unstable'
dihedral effect? i.e. Step on the left pedal and the airplane rolls
right (but still yaws left)? It's a very strange feeling.


The Alpha Jet's dihedral effect goes unstable at high Mach - above about
M0.86 IIRC. I agree that the "wrong" roll due to yaw would get your
attention if you ever had cause to use the rudder. The dutch roll was
absolutely bizarre too, as the roll rate at each point in the cycle was
very different than a normal dutch roll.

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