And you're still wrong.
Michael is completely right that the control surface volume is the design
parameter for a the control surface (apart the airfoil of course).
Yaw stability and responsivity both depend on the rudder volume, but yaw
stability is achieved with less rudder volume than reponsitivity - so the
latter is basically a design tradeoff between responsitivity and drag.
Now if you don't believe that, get a textbook.

--
Bert Willing

ASW20 "TW"


"Roy Bourgeois" a écrit dans le message de
...
I think that the difference is that my original post focused on "rudder
response" and others are focusing on "yaw stability" - which are different
and somewhat opposite. The 1-34 is quite stabile in yaw but as Doug noted
in his first post, it's response (time to desired effect) to your stepping
on the pedal is pretty bad. I flew several 1-34s about 250 hours (and
still occasionally). It doesn't have a problem with adverse yaw in a
turn. But when you step on the pedal (say, to begin a slip) - nothing
much
happens (compared to other gliders). I was suggesting to Doug (and still
believe) that the lack of rudder "response" is a function of the
extraordinary fuselage length and that he would need a much bigger rudder
to solve that problem.

Now - if somebody will show me how to make my Nimbus 3 do ANYTHING
responsively - I'll be eternally grateful

Roy