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<DIV><FONT color=#000000 size=2>jezz Matt... the last time I used a transit was
25 yrs ago when I was pouring foundations for a house. I'll
stand over here with the transit and then I'll have my wife hold the witching
wand(transit rod) and see which one gets level first. The airplane or my
wife. With my luck she probably walk over to me and smack me level to the
ground.</FONT></DIV>
<DIV><FONT color=#000000 size=2></FONT><FONT size=2>heh! heh!</FONT></DIV>
<DIV><FONT color=#000000 size=2></FONT> </DIV>
<DIV><FONT size=2>WG</FONT></DIV>
<BLOCKQUOTE
style="BORDER-LEFT: #000000 solid 2px; MARGIN-LEFT: 5px; PADDING-LEFT: 5px">
<DIV><FONT face=Arial size=2><B>-----Original Message-----</B><BR><B>From:
</B><A href="mailto:Rcmaster199@aol.com">Rcmaster199@aol.com</A> <<A
href="mailto:Rcmaster199@aol.com">Rcmaster199@aol.com</A>><BR><B>To:
</B><A href="mailto:discussion@nsrca.org">discussion@nsrca.org</A> <<A
href="mailto:discussion@nsrca.org">discussion@nsrca.org</A>><BR><B>Date:
</B>Wednesday, May 21, 2003 7:15 PM<BR><B>Subject: </B>Re: Incidence
meters<BR><BR></DIV></FONT><FONT face=arial,helvetica><FONT face=Arial
lang=0 size=2 FAMILY = SANSSERIF>A couple of thoughts on this
thread:<BR><BR>First, for a model that has progressed enough to have all the
pieces built-- the easiest way to get the various angles needed is with a
transit. There are alot of benefits, the most important of which is this:
the model doesn't need any fancy surface tables or any lazer beams to get it
level, because it really does not need to be level. All measurements are
made relative to the transit's plane of rotation, so the model's attitude
only needs to be adjusted to be parallel to this plane. And if you want to
be absolutely dead certain that stab and wing are parallel, well that's
straight forward also<BR><BR>Transits can be expensive devices but eBay may
have something for cheap. Learning to use one is not that tough really, and
shouldn't pose a problem for most any pattern flier.<BR><BR>The easiest way
I have found to determine the zero thrust line on a glass fuse, is with
sewing thread. The center at the nose is fairly easy to get exact, so I tie
a length of thread from the nose center to the tail post, at the appropriate
height on the post so the fuse sets properly. Scribe lines are then
transcribed to the outside of the fuse.<BR><BR>My penny's worth
FWIW<BR><BR>Matt Kebabjian<BR><BR><BR>
<BLOCKQUOTE
style="BORDER-LEFT: #0000ff solid 2px; MARGIN-LEFT: 5px; MARGIN-RIGHT: 0px; PADDING-LEFT: 5px"
TYPE = CITE>Subj:<B>Re: Incidence meters </B><BR>Date:5/21/2003 5:41:30
PM Eastern Daylight Time<BR>From:<A
href="mailto:ojfrets@earthlink.net">ojfrets@earthlink.net</A><BR>Reply-to:<A
href="mailto:discussion@nsrca.org">discussion@nsrca.org</A><BR>To:<A
href="mailto:discussion@nsrca.org">discussion@nsrca.org</A><BR><I>Sent
from the Internet </I><BR><BR><BR><BR>I guess I'll keep doing the way I
always do it. I was looking for an easier<BR>way to do the incidence. I
do a bit scratch building, during the building<BR>process, lines
reference lines are drawn on the wood surfaces. I generally<BR>level the
plane to the work surface using the stab or the reference<BR>markings as
a reference point. Then mark a line that is parallel to the<BR>work
surface and measure from that line and/or the work surface.<BR>I
use a string and line level for leveling for the setup. Works pretty
well<BR>but is time consuming. Also pretty accurate.<BR>Thanks to all
who replied. This list is pretty
good!!!!!!!!!!!!!!<BR><BR>Orlando<BR><BR><BR>> [Original
Message]<BR>> From: Kenneth Blackwell
<kblackw@snowhill.com><BR>> To:
<discussion@nsrca.org><BR>> Date: 5/21/2003 9:28:41 AM<BR>>
Subject: Re: Incidence meters<BR>><BR>> Paul,<BR>><BR>> The
line that you mentioned is the "zero thrust line" and it is
determined<BR>> by the designer when the airplane is laid out. If you
are starting with a<BR>> kit, the kit manufacturer should provide
information that will allow you<BR>to<BR>> set up the incidences
corectly. Sometimes this is accomplished by<BR>specifying<BR>> how to
set the fuselage up on a flat surface, by blocking up the tail a<BR>>
specified amount. Then, you can measure up from that flat surface to
the<BR>LE<BR>> and TE....and calculate the incidence angle with
trig....etc. etc. Another<BR>> way that manufacturers specify the
incidences is by scribe lines or mold<BR>> lines on the sides of the
fuselage.<BR>><BR>> In the end, the most accurate way to determine
incidences is by measuring<BR>> LE/TE from a good flat surface....as
Jerry Budd has already stated<BR>earlier.<BR>> We need to be able to
set incidences to an accuracy of about 0.1 deg and<BR>> this just
isn't possible with any of the devices mentioned...so
far.<BR>><BR>> Cheers,<BR>><BR>> Ken
Blackwell<BR>><BR>> ----- Original Message -----<BR>> From:
"Paul Lawrence" <pwl45@yahoo.com><BR>> To:
<discussion@nsrca.org><BR>> Sent: Wednesday, May 21, 2003 7:56
AM<BR>> Subject: Re: Incidence meters<BR>><BR>><BR>> >
Speaking of incidence, what is the best way to find the thrust line
for<BR>> > measuring the
incidence?</BLOCKQUOTE><BR><BR></FONT></FONT></BLOCKQUOTE></BODY></HTML>