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<DIV><FONT face=Arial size=2>I am certain I am not the only one wondering where
we are going with this trend. </FONT></DIV>
<DIV><FONT face=Arial size=2>Everything about electric turns me on except
the costs. </FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>At some point we come to the conclusion that there
is no sense in those of us with marginal skills even to try with recip engines.
When we choose to do something else, will there be enough contestants left to
have a contest? In some areas we are already struggling to break even on a
contest. </FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>It is the same question that comes up with each
major technology change. It happened with Turnaround and unlimited engine
size. So far, those changes have not destroyed the game. I have to wonder if we
will survive this one. </FONT></DIV>
<DIV> </DIV>
<DIV>John Ferrell <BR><A
href="http://DixieNC.US">http://DixieNC.US</A><BR></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=ehaury@houston.rr.com href="mailto:ehaury@houston.rr.com">Earl
Haury</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A
title=nsrca-discussion@lists.nsrca.org
href="mailto:nsrca-discussion@lists.nsrca.org">Discussion List, NSRCA</A>
</DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Saturday, January 21, 2006 12:02
PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> [NSRCA-discussion] E Stuff</DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>So - I set about trying to determine if E flies
better and why. So far the answer is yes and I'm not sure. While differences
in dynamics can be identified, it's hard to quantify the effects. For example,
the lighter / slower rotating E prop generates a lower gyroscopic precession
force during looping maneuvers than glow - this also suggests the lower
rotating mass of a geared motor might be better. The lighter motor (compared
to glow engine) up front can result in a lower pitch moment of
inertia if the tail is light enough to allow the battery mass to be close to
the CG. Airplane smoothness in rough air is markedly better with E. (I did
most of my comparisons with twin Partners - one glow and one E - at about the
same flight weight.) This may be an effect of the large diameter prop or
lack of vibration effect on the servos. As others have noted, thrust
application is very good with E as the slower prop is efficient and the motor
is instantly responsive and very linear. E can be flown slower than or as fast
as glow, the airplane is more stable with E when slow - again
probably the large prop effect. Overall, it's easier to fly well with E but E
won't fix sloppy flying.</FONT></DIV>
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