<HTML><FONT FACE=arial,helvetica><HTML><FONT SIZE=2 PTSIZE=10 FAMILY="SANSSERIF" FACE="Arial" LANG="0">Along Kenny's line of thinking, a height gauge is the device of choice for vertical measurements. I have written about that before but it's worth repeating. It's a device that has a vertically moving pointer/slider, which moves on a graduated rule which is itself mounted on a base. Practically all the measurement device manufacturers (micrometers and such, Mitotuyo, Browne and Sharpe, etc) make these. Either the digital readout type or mechanical analog type is fine, but I prefer the analog type; they are very inexpensive on the order of 30-50$ or so for the analog. The new Chinese offerings are even less than that. Harbor Freight Tools is a good source for the Chinese height gauges<BR>
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The carbide scribe pointer can be used to good advantage to actually scribe markings on the fuse sides. The markings will be as accurate as your surface table.<BR>
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BTW wing accuracy is simple to check with such a device. <BR>
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"If you can't measure it, you don't know when you have it made"<BR>
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Matt K<BR>
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<BLOCKQUOTE TYPE=CITE style="BORDER-LEFT: #0000ff 2px solid; MARGIN-LEFT: 5px; MARGIN-RIGHT: 0px; PADDING-LEFT: 5px">Subj:<B>Re: Urgent ! Incidence Meter Question </B><BR>
Date:1/25/2004 7:51:08 AM Eastern Standard Time<BR>
From:<A HREF="mailto:blackwellk@snowhill.com">blackwellk@snowhill.com</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>
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Scott,</FONT><FONT COLOR="#000000" BACK="#ffffff" style="BACKGROUND-COLOR: #ffffff" SIZE=3 PTSIZE=12 FAMILY="SANSSERIF" FACE="Arial" LANG="0"><BR>
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</FONT><FONT COLOR="#000000" BACK="#ffffff" style="BACKGROUND-COLOR: #ffffff" SIZE=2 PTSIZE=10 FAMILY="SANSSERIF" FACE="Arial" LANG="0">Incidence meters of all types are generally not accurate enough for pattern use. You need an accuracy of 0.1 deg. I have an electronic digital level that will read to 0.1 deg and I only use it for cross checks. Although the readout is good to 0.1 deg, the overall accuracy isn't that good. If you have a good flat table...the very <B>best way</B> is to set the fuse on the table and measure up to the centers of wing/stab LE/TE then with trig calculate the incidence angle. To do this you need an accurate vertical measurementwith an accuracy of 1/64" or better. On the Focus I and II the bottom of the fuselage is zero incidence. Both wing and stab should be set to specifications provided by Piedmont from this reference.</FONT><FONT COLOR="#000000" BACK="#ffffff" style="BACKGROUND-COLOR: #ffffff" SIZE=3 PTSIZE=12 FAMILY="SANSSERIF" FACE="Arial" LANG="0"><BR>
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</FONT><FONT COLOR="#000000" BACK="#ffffff" style="BACKGROUND-COLOR: #ffffff" SIZE=2 PTSIZE=10 FAMILY="SANSSERIF" FACE="Arial" LANG="0">Cheers,</FONT><FONT COLOR="#000000" BACK="#ffffff" style="BACKGROUND-COLOR: #ffffff" SIZE=3 PTSIZE=12 FAMILY="SANSSERIF" FACE="Arial" LANG="0"><BR>
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</FONT><FONT COLOR="#000000" BACK="#ffffff" style="BACKGROUND-COLOR: #ffffff" SIZE=2 PTSIZE=10 FAMILY="SANSSERIF" FACE="Arial" LANG="0">Ken Blackwell</FONT><FONT COLOR="#000000" BACK="#ffffff" style="BACKGROUND-COLOR: #ffffff" SIZE=3 PTSIZE=12 FAMILY="SANSSERIF" FACE="Arial" LANG="0"><BR>
</FONT><FONT COLOR="#000000" BACK="#ffffff" style="BACKGROUND-COLOR: #ffffff" SIZE=2 PTSIZE=10 FAMILY="SANSSERIF" FACE="Arial" LANG="0">Precision Model Design</FONT><FONT COLOR="#000000" BACK="#ffffff" style="BACKGROUND-COLOR: #ffffff" SIZE=3 PTSIZE=12 FAMILY="SANSSERIF" FACE="Arial" LANG="0"><BR>
</FONT><FONT COLOR="#0000ff" BACK="#ffffff" style="BACKGROUND-COLOR: #ffffff" SIZE=2 PTSIZE=10 FAMILY="SANSSERIF" FACE="Arial" LANG="0"><A HREF="mailto:blackwellk@snowhill.com">blackwellk@snowhill.com</A></FONT><FONT COLOR="#000000" BACK="#ffffff" style="BACKGROUND-COLOR: #ffffff" SIZE=3 PTSIZE=12 FAMILY="SANSSERIF" FACE="Arial" LANG="0"><BR>
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<BLOCKQUOTE TYPE=CITE style="BORDER-LEFT: #0000ff 2px solid; MARGIN-LEFT: 5px; MARGIN-RIGHT: 0px; PADDING-LEFT: 5px">----- Original Message ----- <BR>
<B>From:</B> <A HREF="mailto:F3AFlyer7@comcast.net">Scott Pavlock</A> <BR>
<B>To:</B> <A HREF="mailto:discussion@nsrca.org">NSRCA Discussion Page</A> <BR>
<B>Sent:</B> Saturday, January 24, 2004 7:20 PM<BR>
<B>Subject:</B> Urgent ! Incidence Meter Question<BR>
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<BLOCKQUOTE TYPE=CITE style="BORDER-LEFT: #0000ff 2px solid; MARGIN-LEFT: 5px; MARGIN-RIGHT: 0px; PADDING-LEFT: 5px">I am currently installing my wing adusters on my Focus 2 and I am trying to calibrate my Great Planes Incidence Meter. I placed the meter on a perfectly level table and set it for Zero Degrees. I decided to rotate the device 180 to see if it would still be level (the laser was roughly facing north and now is facing south). The degrees changed positive 1/2 degree. I thought I might have moved the placement of the laser so I secured everything possible with tape and rotated it again. Same thing. Does anyone know what might be the problem???</FONT><FONT COLOR="#000000" BACK="#ffffff" style="BACKGROUND-COLOR: #ffffff" SIZE=3 PTSIZE=12 FAMILY="SANSSERIF" FACE="Arial" LANG="0"><BR>
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</FONT><FONT COLOR="#000000" BACK="#ffffff" style="BACKGROUND-COLOR: #ffffff" SIZE=2 PTSIZE=10 FAMILY="SANSSERIF" FACE="Arial" LANG="0">Thanks in advance!</FONT><FONT COLOR="#000000" BACK="#ffffff" style="BACKGROUND-COLOR: #ffffff" SIZE=3 PTSIZE=12 FAMILY="SANSSERIF" FACE="Arial" LANG="0"><BR>
</FONT><FONT COLOR="#000000" BACK="#ffffff" style="BACKGROUND-COLOR: #ffffff" SIZE=2 PTSIZE=10 FAMILY="SANSSERIF" FACE="Arial" LANG="0">_______________________________________________________________<BR>
Scott Pavlock</FONT><FONT COLOR="#000000" BACK="#ffffff" style="BACKGROUND-COLOR: #ffffff" SIZE=3 PTSIZE=12 FAMILY="SANSSERIF" FACE="Arial" LANG="0"><BR>
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</FONT><FONT COLOR="#000000" BACK="#ffffff" style="BACKGROUND-COLOR: #ffffff" SIZE=2 PTSIZE=10 FAMILY="SANSSERIF" FACE="Arial" LANG="0">photos.yahoo.com/f3aflyer7</FONT><FONT COLOR="#000000" BACK="#ffffff" style="BACKGROUND-COLOR: #ffffff" SIZE=3 PTSIZE=12 FAMILY="SANSSERIF" FACE="Arial" LANG="0"><BR>
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