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<DIV><FONT face=Arial size=2>Troy let me get this straight in my mind, You
said</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>"The reason is the servo wheel is round and its Y
axis distance changes for each degree of travel as the servo rotates around the
back side."</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Now It took me a few readings and some pondering to
understand what you said. It doesn't matter what type arm you use,correct so
far? What I take this to mean is as the servo arm moves the point at which the
servo is connected to the driving rod and the center arm screw is at it's
farthest point at 90 degrees to the servo case (assuming the servo case is 90
degrees to the hinge line) as it moves forward or backwards the
distance between the pivot points decreases with each degree of rotation.
Correct?</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=troy_newman@msn.com href="mailto:troy_newman@msn.com">Troy A.
Newman</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A title=discussion@nsrca.org
href="mailto:discussion@nsrca.org">discussion@nsrca.org</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Friday, February 11, 2005 11:05
PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> [SPAM] Re: Notes to Self 3</DIV>
<DIV><BR></DIV>
<DIV><FONT face=Arial size=2>8103, 9303 and 10X expo are the same Positive is
softer and Negative is harder feel. I'm writing an article for the KF right
now that talks about Expo and how to use it. When to use it. And the effects
of it. Sometimes a reverse expo (faster response) at center can be of benefit.
We have played with this in snaps and found that it has some promise...Lots of
regular expo on the ailerons and rudder and reverse expo on the elevator...The
result is the model will pitch harder on entry before the
rotations.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Another thing depending on the radio it takes
20-30% expo just to get the output to be linear. The reason is the servo wheel
is round and its Y axis distance changes for each degree of travel as the
servo rotates around the back side.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>This is March KF stuff so I won't elaborate here
but I have some data to back up my words. </FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Troy</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2></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=tncbrown@charter.net href="mailto:tncbrown@charter.net">T&C
Brown</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A title=discussion@nsrca.org
href="mailto:discussion@nsrca.org">discussion@nsrca.org</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Wednesday, February 09, 2005 8:42
PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: Notes to Self 3</DIV>
<DIV><BR></DIV>
<DIV><FONT size=2>That is odd Tim. I wonder why JR decided after all
these years to change from a pos. setting to a neg. for a "softer
feel". I'm a firm believer in "If it ain't broke, don't fix
it" </FONT></DIV>
<DIV><FONT size=2>I made the same mistake a few years back when I switched
from a Futaba 7UAP to a JR 8103 and inadvertently put neg. expo in the
8103. Talk about pucker factor for a few minutes.</FONT><FONT
size=2> </FONT></DIV>
<DIV><FONT size=2>Maybe Fu-tuh-boo-boo is rubbing off on JR!
(BG)</FONT></DIV>
<DIV><FONT size=2></FONT> </DIV>
<DIV><FONT size=2>T-Bone</FONT></DIV>
<DIV><FONT size=2></FONT> </DIV>
<BLOCKQUOTE dir=ltr
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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=twtaylor@ftc-i.net href="mailto:twtaylor@ftc-i.net">Tim
Taylor</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A title=discussion@nsrca.org
href="mailto:discussion@nsrca.org">discussion@nsrca.org</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Wednesday, February 09, 2005
12:18 PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: Notes to Self 3</DIV>
<DIV><BR></DIV>
<DIV><FONT face=Arial size=2>That's the whole point in the story Ron, I
ASSUMED I was right and didn't NEED to RTFB and could have screwed up big
time. I've been flying JR radios for years but always a PCM10 of some
sort, this 9303 is a new radio for me. What I did was get in a hurry,
I wanted to fly and trim this airplane and didn't do what I should have
done first. I hope my not so comical errors will help someone else from
making the same mistake I did.</FONT></DIV>
<BLOCKQUOTE
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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=vanputte@cox.net href="mailto:vanputte@cox.net">Ron Van
Putte</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A title=discussion@nsrca.org
href="mailto:discussion@nsrca.org">discussion@nsrca.org</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Wednesday, February 09, 2005
12:01 PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: Notes to Self 3</DIV>
<DIV><BR></DIV><BR>On Feb 9, 2005, at 8:28 AM, Tim Taylor wrote:<BR><BR>
<BLOCKQUOTE><?fontfamily><?param Arial><?smaller>As our Continuing
story unfolds........<?/smaller><?/fontfamily><BR> <BR><?fontfamily><?param Arial><?smaller>Timmy
T is looking out of the shop door and sees that the weather is just
perfect for some trim flights<?/smaller><?/fontfamily><BR> <BR><?fontfamily><?param Arial><?smaller>So
we pack up the trailer and go for some trim flights. Recalling
the last flights all control throws too sensitive so
I dial in less rates on low and put high rates to what low was
before. Ok time to dial in some Expo on all surfaces, pop up the
screen on the 9303 and dial in 30%. Ok time to fly. Airplane seems
pretty stable now but the controls feel a bit "Twitchy" hmmm no
problem continue the flight land and have a look. Ok maybe I didn't
get enough expo dialed in so add some more. Next flight about the same
but the controls seem a bit more "twicthy" hmmm something's not right
here. Ok times up for flying for today pack up and head home. On the
way home I get to thinking about the last flight and how the airplane
changed the "feel" after I added the expo. Ok I get to wondering where
the heck did I put the book for this new radio, Ok lets review the
book on page A20 is the expo directions, it states "NOTE: Use only
positive percentages unless there is a distinct need to do otherwise".
Hmmmmmm that don't sound right! Turn the transmitter on and look at
the expo I've got dialed into the radio,
*&%^$*&#)(#&%^%)@(_*&_(^# Everything is done to
the NEGATIVE !!!!!! No damn wonder! So "Note to self" today's lesson
is READ THE FRIGGIN BOOK
!!!!!!!!!<?/smaller><?/fontfamily><BR> <BR><?fontfamily><?param Arial><?smaller>Ok
while I'm at it lets program a little down elevator trim at low
idle, I wonder what page that is on in the book..................
"Fade to Black as Timmy T reaches for the book."<?/smaller><?/fontfamily><BR></BLOCKQUOTE><BR>My guess is that
he's using a JR radio, because negative exponential is what you want on
a Futaba transmitter to soften the control response. That's why
well-meaning people at the field need to find out what brand of
transmitter the guy being counseled has before telling him how to change
the expo. <BR><BR>I had a similar situation when I was helping a novice
trim out his airplane. After I flew a trim flight for him, I told him he
needed 50 - 60% exponential on elevator and aileron. I asked him if he
knew how to do that and he said that he did. The airplane was a handful
on the subsequent flight, because he put in the wrong expo!<BR><BR>Ron
Van Putte<BR></BLOCKQUOTE></BLOCKQUOTE></BLOCKQUOTE></BLOCKQUOTE></BODY></HTML>