REFLECTOR:Pitch Trim Spring
Ronnie Brown
reflector@tvbf.org
Sun, 16 May 2004 20:21:44 -0400
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I have a 173 Elite RG and did not alter the trim spring. I too thought =
it seemed awfully stiff after I installed it. But once flying, it is =
fine just the way it is. Stick forces for pitch and roll are pretty =
balanced when trimmed for cruise.
You need a lot of up trim (2" for two people up front), which pretty =
much washes out by the time you are flying. The only problem I have is =
in a cruise descent and I am alone. It takes pretty good forward stick =
pressure to descend. With two people not a problem. I am planning to =
make a new front trim motor bracket to provide a little more down trim =
but it is not high on my priority list. I can relieve the forward =
pressure just by pulling back on the power some more (get the airspeed =
down to 140-150 kts in the descent instead of 165 knots). If you trim =
the spring, you will wind up having to apply much more stick forces on a =
loaded take off and in descent.
I'd suggest installing the spring per the manual. It works!
Ronnie
----- Original Message -----=20
From: Jim Sower=20
To: reflector@tvbf.org=20
Sent: Sunday, May 16, 2004 6:12 PM
Subject: Re: REFLECTOR:Pitch Trim Spring
I've been wondering the same thing. I figured I'd just trim the =
compromised part of the spring a little to reduce stick pressure and see =
what it felt like and go at it progressively. Trouble is, if I didn't =
like it, if it became too light, what would I do then? I'd have to make =
a new one and start the process over and .... Figured I'd make a new =
spring as exactly like the original as I could, and cut that one. I'd =
attach it and measure stick pressure per elevator deflection for both =
units and go to work. If I got somewhere that I didn't want to be, I =
could always re-install the original.=20
Having thought it through this far, I reminded myself that either I =
had got used to the original spring (and the relationship between pitch =
and roll stick forces) really REALLY fast, or that they were right about =
where they needed to be. Decided I did NOT need a light stick in pitch =
but a heavy one in roll. I put the whole project waaaay down toward the =
bottom of my list.=20
I suspect it will stay there .... Jim S.=20
NMFlyer1@aol.com wrote:=20
I recently rigged my elevators and attached my pitch trim. The pitch =
trim force seems quite high. I know that the trim spring can be trimmed =
to get the force that you want. What I don't know is what force would be =
comfortable in the air, and how much more stiff the system feels with an =
airload.=20
Any words of advice from those flying?=20
I have the 173 FGE.=20
Kurt Winker=20
_______________________________________________=20
To change your email address, visit =
http://www.tvbf.org/mailman/listinfo/reflector=20
Visit the gallery! www.tvbf.org/gallery=20
user:pw =3D tvbf:jamaicangoose=20
Check new archives: www.tvbf.org/pipermail=20
Check old archives: =
http://www.tvbf.org/archives/velocity/maillist.html
--=20
Jim Sower ... Destiny's Plaything=20
Crossville, TN; Chapter 5=20
Long-EZ N83RT, Velocity N4095T=20
=20
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<BODY bgColor=3D#ffffff>
<DIV><FONT size=3D2>I have a 173 Elite RG and did not alter the trim =
spring. =20
I too thought it seemed awfully stiff after I installed it. But =
once=20
flying, it is fine just the way it is. Stick forces for pitch and =
roll are=20
pretty balanced when trimmed for cruise.</FONT></DIV>
<DIV><FONT size=3D2></FONT> </DIV>
<DIV><FONT size=3D2>You need a lot of up trim (2" for two people up =
front), which=20
pretty much washes out by the time you are flying. The only =
problem I have=20
is in a cruise descent and I am alone. It takes pretty good =
forward stick=20
pressure to descend. With two people not a problem. I am =
planning to=20
make a new front trim motor bracket to provide a little more down =
trim but=20
it is not high on my priority list. I can relieve the forward =
pressure=20
just by pulling back on the power some more (get the airspeed down to =
140-150=20
kts in the descent instead of 165 knots). If you trim the spring, =
you will=20
wind up having to apply much more stick forces on a loaded take off and =
in=20
descent.</FONT></DIV>
<DIV><FONT size=3D2></FONT> </DIV>
<DIV><FONT size=3D2>I'd suggest installing the spring per the =
manual. It=20
works!</FONT></DIV>
<DIV><FONT size=3D2></FONT> </DIV>
<DIV><FONT size=3D2>Ronnie</FONT></DIV>
<BLOCKQUOTE dir=3Dltr=20
style=3D"PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; =
BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
<DIV style=3D"FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV=20
style=3D"BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: =
black"><B>From:</B>=20
<A title=3Dcanarder@frontiernet.net =
href=3D"mailto:canarder@frontiernet.net">Jim=20
Sower</A> </DIV>
<DIV style=3D"FONT: 10pt arial"><B>To:</B> <A =
title=3Dreflector@tvbf.org=20
href=3D"mailto:reflector@tvbf.org">reflector@tvbf.org</A> </DIV>
<DIV style=3D"FONT: 10pt arial"><B>Sent:</B> Sunday, May 16, 2004 6:12 =
PM</DIV>
<DIV style=3D"FONT: 10pt arial"><B>Subject:</B> Re: REFLECTOR:Pitch =
Trim=20
Spring</DIV>
<DIV><BR></DIV>I've been wondering the same thing. I figured I'd =
just=20
trim the compromised part of the spring a little to reduce stick =
pressure and=20
see what it felt like and go at it progressively. Trouble is, if =
I=20
didn't like it, if it became <I>too</I> light, what would I do =
then? I'd=20
have to make a new one and start the process over and .... =
Figured I'd=20
make a new spring as exactly like the original as I could, and cut =
<I>that</I>=20
one. I'd attach it and measure stick pressure per elevator =
deflection=20
for both units and go to work. If I got somewhere that I didn't =
want to=20
be, I could always re-install the original.=20
<P>Having thought it through this far, I reminded myself that either I =
had got=20
used to the original spring (and the relationship between pitch and =
roll stick=20
forces) really REALLY fast, or that they were right about where they =
needed to=20
be. Decided I did NOT need a light stick in pitch but a heavy =
one in=20
roll. I put the whole project waaaay down toward the bottom of =
my list.=20
<P>I suspect it will stay there .... Jim S.=20
<P>NMFlyer1@aol.com wrote:=20
<BLOCKQUOTE TYPE=3D"CITE">I recently rigged my elevators and attached =
my pitch=20
trim. The pitch trim force seems quite high. I know that the trim =
spring can=20
be trimmed to get the force that you want. What I don't know is what =
force=20
would be comfortable in the air, and how much more stiff the system =
feels=20
with an airload.=20
<P>Any words of advice from those flying? <BR>I have the 173 FGE.=20
<P>Kurt Winker <BR>_______________________________________________ =
<BR>To=20
change your email address, visit <A=20
=
href=3D"http://www.tvbf.org/mailman/listinfo/reflector">http://www.tvbf.o=
rg/mailman/listinfo/reflector</A>=20
<P>Visit the gallery! www.tvbf.org/gallery <BR>user:pw =3D=20
tvbf:jamaicangoose <BR>Check new archives: www.tvbf.org/pipermail =
<BR>Check=20
old archives: <A=20
=
href=3D"http://www.tvbf.org/archives/velocity/maillist.html">http://www.t=
vbf.org/archives/velocity/maillist.html</A></P></BLOCKQUOTE>
<P>-- <BR>Jim Sower ... Destiny's Plaything <BR>Crossville, TN; =
Chapter 5=20
<BR>Long-EZ N83RT, Velocity N4095T <BR> =
</P></BLOCKQUOTE></BODY></HTML>
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