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<DIV><FONT face=Arial size=2>Bob</FONT></DIV>
<DIV><FONT face=Arial size=2>If you design for the static condition, then ,as
the roll rate increases the AOA progressively decreases at the wing tip. (
Simply add, vectorily, the rotational velocity to the airspeed
)
Nat</FONT></DIV>
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<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B>
<A title=bob@toprudder.com href="mailto:bob@toprudder.com">Bob Richards</A>
</DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A
title=nsrca-discussion@lists.nsrca.org
href="mailto:nsrca-discussion@lists.nsrca.org">NSRCA Mailing List</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Monday, September 11, 2006 8:30
AM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: [NSRCA-discussion] Aero
design question</DIV>
<DIV><BR></DIV><BR><B><I>Nat Penton <<A
href="mailto:natpenton@centurytel.net">natpenton@centurytel.net</A>></I></B>
wrote:
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<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>For ailerons, IMO, the Cl along the span should
be about constant to lower the probability of tip stall This would
be constant % chord ( Bob Richards ?).</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=Arial
size=2>
Nat</FONT><BR></DIV></BLOCKQUOTE>
<DIV> </DIV>
<DIV>Nat, I think I understand your point. In a static situation
(ailerons deflected, but not rolling) I would agree with you. However, in a
dynamic situation where the airplane IS rolling, then the angle-of-attack
at each point along the span is different (due to the rolling action) and
everything changes (back to the helical pitch analogy).</DIV>
<DIV> </DIV>
<DIV>It would be interesting to have someone try this in a wind tunnel, but
I'm not sure how you would rig the model in the tunnel. </DIV>
<DIV> </DIV>
<DIV>I think back to the Wright Flyer, did that have a tip-stall tendency?? I
don't know, I never flew one! :-) If aileron deflection would
cause a tip stall, that would be the worst case since the highest AOA is at
the tip.</DIV>
<DIV> </DIV>
<DIV>Bob R.</DIV>
<DIV> </DIV>
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