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<DIV><FONT face=Arial size=2>Jim,</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>You reminded me--you know you're doing a lot of
building when you start recognizing the characteristics of each of your T
pins.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Richard</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=Jim_Woodward@beaerospace.com
href="mailto:Jim_Woodward@beaerospace.com">Jim_Woodward@beaerospace.com</A>
</DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A title=derekkoopowitz@earthlink.net
href="mailto:derekkoopowitz@earthlink.net">Derek Koopowitz</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Cc:</B> <A title=discussion@nsrca.org
href="mailto:discussion@nsrca.org">discussion@nsrca.org</A> ; <A
title=discussion-request@nsrca.org
href="mailto:discussion-request@nsrca.org">discussion-request@nsrca.org</A>
</DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Wednesday, March 30, 2005 3:52
PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: Composite-ARF IMPACT
question</DIV>
<DIV><BR></DIV><BR><FONT face=sans-serif size=2>Hi Guys,</FONT> <BR><BR><FONT
face=sans-serif size=2>Just been through the alignment process of the Impact.
Although many are using 'zero-engine downthrust, zero stab, 0.25 wing, I
decided to jig the fuse such that the nose gave 1 degree downthrust. Then
measured for a zero stab and 0.25 wing. At the top of the rudder, just
measure the width and split it with a small hole for a T-pin. I then
temporarily insert a small section of balsa for the bottom of the T pin to
stick in. I then used some extra control line wire looped around the T
pin, to take measurement to the wing tips and stab tips.</FONT> <BR><BR><FONT
face=sans-serif size=2>Thanks,</FONT> <BR><FONT face=sans-serif
size=2>Jim</FONT> <BR><FONT face=sans-serif size=2><BR></FONT><BR><BR><BR>
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<TD width="40%"><FONT face=sans-serif size=1><B>Derek Koopowitz
<derekkoopowitz@earthlink.net></B> </FONT><BR><FONT
face=sans-serif size=1>Sent by: discussion-request@nsrca.org</FONT>
<P><FONT face=sans-serif size=1>03/30/2005 04:33 PM</FONT>
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<DIV align=center><FONT face=sans-serif size=1>Please respond
to<BR>Derek Koopowitz
<derekkoopowitz@earthlink.net></FONT></DIV></TR></TBODY></TABLE><BR></P>
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<DIV align=right><FONT face=sans-serif size=1>To</FONT></DIV>
<TD><FONT face=sans-serif size=1>discussion@nsrca.org,
discussion@nsrca.org</FONT>
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<TD>
<DIV align=right><FONT face=sans-serif size=1>cc</FONT></DIV>
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<DIV align=right><FONT face=sans-serif size=1>Subject</FONT></DIV>
<TD><FONT face=sans-serif size=1>Re: Composite-ARF IMPACT
question</FONT></TR></TBODY></TABLE><BR>
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<TD></TR></TBODY></TABLE><BR></TR></TBODY></TABLE><BR><BR><BR><FONT
size=2><TT>Jim,<BR><BR>Based on the discussions I've read on RCU... don't rely
on the seams to provide you with a measuring point for the stab or wings.
I've read that these can be off as much as 3mm. I would take some
other measurements - perhaps from the bottom of the rudder post to the
trailing edge of the wingtip, for instance.<BR><BR>-----Original
Message-----<BR>From: "J.Oddino" <joddino@socal.rr.com><BR>Sent: Mar 30,
2005 1:03 PM<BR>To: discussion@nsrca.org<BR>Subject: Re: Composite-ARF IMPACT
question<BR><BR>Lance, I hope you are right. I've spent days trying to
determine where the<BR>centerline (top view) of the fuse is. Then I read
where Erik said his was<BR>set up per the instructions so that is what I did.
I set the wing<BR>perpendicular by measuring from the top center of the
vertical fin to the<BR>wing tip trailing edges and from the fin to the corner
of the ailerons.<BR>Then I set the stab perpendicular by measuring from the
seam at the spinner<BR>ring to the stab tips at the trailing edge. The
distance from wing tips to<BR>stab tips is the same on both sides but I can
measure some other stuff that<BR>says something is wrong. If it tracks okay I
won't care because I can't see<BR>a problem without all my jigs and
tools.<BR>The bottom line is if you don't like spending a lot of time to get
it<BR>perfect buy an ARF. Having said that, I have never checked any of
my ARFs<BR>to see how good they are in the plan view. If it was easy we
wouldn't be<BR>doing it.<BR>Jim O<BR>----- Original Message ----- <BR>From:
"Lance Van Nostrand" <patterndude@comcast.net><BR>To:
<discussion@nsrca.org><BR>Sent: Monday, March 28, 2005 7:51
PM<BR>Subject: Re: Composite-ARF IMPACT question<BR><BR><BR>> Eric,<BR>>
Glad the plane is a winner. I'm curious about something.<BR>><BR>>
A while back there was a thread on this plane that discussed a bit of
a<BR>> bannana bow in the fuse. I assume yours has this, like the
others, and it<BR>> is inconsquential. right?<BR>><BR>> My
curiosity on this stems from an even earlier thread about how flat a<BR>>
table you need to make wings and how much wing bow is too much. From
what<BR>I<BR>> remember, the conclusion was that if you can't use your wing
trailing edge<BR>> as a reference line for laser optics than you are doing
something wrong.<BR>><BR>> This struck me as funny since I've flown some
excellent planes that had<BR>some<BR>> wing warp and am of the radical
opinion that there is a true error band<BR>> where a little wing bow (I'm
talking maybe 1/8" over 32") is unnoticeable.<BR>> Yes, it is measureable
but if no one can tell the difference than No<BR>flatter<BR>> is not
inherently better. There's always a point on the way to
perfection<BR>> that we consider as good enough and another point where we
say that our<BR>> tools will not allow us to measure any smaller
deviations. They are not<BR>> necessarily the same
point!<BR>><BR>> I've never done an engineering study but I would love
to know when the<BR>> wing/fuse is straight enough, so that after that
point I am only pursuing<BR>> the perfection of the craft, or to impress my
friends, or to see if I can,<BR>> or whatever.<BR>><BR>>
--Lance<BR>><BR>> ----- Original Message ----- <BR>> From: "Grow
Pattern" <pattern4u@comcast.net><BR>> To:
<discussion@nsrca.org><BR>> Sent: Sunday, March 27, 2005 5:46
PM<BR>> Subject: Composite-ARF IMPACT<BR>><BR>><BR>> >
Yesterday was good enough for testing pattern planes in southern NJ.<BR>>
><BR>> > I am pleased to report that if you have not yet flown your
new IMPACT<BR>you<BR>> > should be pleasantly surprised.<BR>>
><BR>> > I was delighted with mine from the moment it left the
ground. It took a<BR>> > while to program the OS mixture carb due to the
cooler temperatures and<BR>a<BR>> > new liner and piston/ring.<BR>>
><BR>> > After the first flight the only mix that I could see that
will be needed<BR>> > will be a tiny bit of roll correction in one
direction. After a<BR>> > length-of-the-field knife-edge KE test you
could get about 1/4 of a roll<BR>> > in the opposite direction to the
right rudder input. There was no<BR>elevator<BR>> > trim required at
all.<BR>> ><BR>> > Thanks to a first class incidence-setting job
by George Asteris the<BR>plane<BR>> > flew great from the outset. Some
planes just feel right as they leave<BR>the<BR>> > ground. This is one
of them. Thanks to all of the throw-setting advice<BR>in<BR>> > the
thread there was no real need to change anything. Spins were solid<BR>>
> with rudder and elevator only, The 2-turn reverse was as good as
the<BR>> > pilot's timing.<BR>> ><BR>> > Because it is an
IMPACT with top ailerons it has the signature<BR>Pterodactyl<BR>> >
"screech!" when you snap. You just add your own "whooping!"....<BR>>
><BR>> > Regards,<BR>> ><BR>> > Eric.<BR>>
><BR>> ><BR>> >
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