Danny, sorry - I misread your question. I thought you were asking as to how
to remember whether it is more up or down aileron...
Anyway, to answer you question better. For aileron differential, you want
more up aileron than down aileron. The reason why is that with DOWN
aileron, you INCREASE the wing's (or airfoil) camber. With an increase in
caber, you increase the cl. Opposite is true for the other side. When you
RAISE the aileron on the other side, you decrease with wing's camber in that
region. With decreased camber you decrease the operating cl. More lift on
one side of the wing (more camber, thus more cl) increases the [vortex]
induced drag. More drag has the effect of "pulling back" on that wing, and
thus making it slower than the other side -- resulting in adverse yaw. This
effect is mainly predominant at low speeds.
Wing you increase the camber of an airfoil, in some cases, you may also get
an increase in profile drag (due to the larger "frontal shape" of the
wing/airfoil.
I hope this explanation was more clear.
Cameron Ninham
----- Original Message -----
From: "daniel gaudenti" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Friday, September 01, 2000 3:22 PM
Subject: [RCSE] aileron differential, which way?
> Should there be more up or down throw, and why?
>
> From what I remember, more up is required. And the reason is to prevent
> adverse yaw. More throw on the up aileron causes more drag and helps the
> plane yaw in the same direction of the turn. Am I remembering correctly?
>
> TIA,
>
> Danny
>
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