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<DIV><FONT face=Arial size=2>Bob</FONT></DIV>
<DIV><FONT face=Arial size=2> Sounds like too much wing incidence. Rotate
them more toward 0 incidence,and this should solve the pitch up in both
cases .... cause you to carry less up elevator,to. This is why
it pitches. Also fine tune CG first.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Jim Ivey</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=rcaerobob@cox.net href="mailto:rcaerobob@cox.net">Bob Pastorello</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, May 22, 2006 6:53 AM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> [NSRCA-discussion] Thrust Line
Trimming</DIV>
<DIV><BR></DIV>
<DIV><FONT face=Arial size=2>Hello - I have a BME 30% Yak, (and had a
TOC/Aviation Models Yak), and both pitch to the canopy when power is reduced
in vertical climbs (also on level cruise power deceleration, too).
Elsewhere, fly well, and doesn't exhibit bizarre incidence problems,
and both needed UP elev. trim for level upright flight.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>ON the RCU threads on these two, owners report
needing to carry up elev trim, also, but haven't gotten any insights on the
engine thrust question.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>I have measured, and there is currently NO up or
down thrust in the motor referenced to centerline.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Could these planes actually need some UP
thrust??</FONT></DIV>
<DIV><FONT face=Arial size=2><BR>Bob Pastorello<BR><A
href="http://www.rcaerobats.net">www.rcaerobats.net</A><BR><A
href="mailto:rcaerobob@cox.net">rcaerobob@cox.net</A></FONT></DIV>
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