<HTML><BODY STYLE="font:10pt verdana; border:none;"><DIV>Ted</DIV> <DIV>Most of those style planes are flat across the top of the wing. I built my extra with wing on table upside down and flat. This gives a effective dihedral due to the thinner tips. I don't believe you would go wrong here to do it that way.</DIV> <DIV> </DIV> <DIV>Jim Ivey</DIV> <DIV> </DIV> <DIV> </DIV> <BLOCKQUOTE style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px"> <DIV style="FONT: 10pt Arial">----- Original Message -----</DIV> <DIV style="BACKGROUND: #e4e4e4; FONT: 10pt Arial; COLOR: black"><B>From:</B> george kennie</DIV> <DIV style="FONT: 10pt Arial"><B>Sent:</B> Saturday, May 10, 2003 10:34 PM</DIV> <DIV style="FONT: 10pt Arial"><B>To:</B> discussion@nsrca.org</DIV> <DIV style="FONT: 10pt Arial"><B>Subject:</B> Re: Design: Dihedral Recommendation</DIV> <DIV> </DIV>Put in 7/32" dihedral, and move the stab down an additional 1/2". Of course we<BR>don't know what the engine offsets are( I think I would try 2&1/2 right and<BR>1&1/2 down).<BR>Does that thing have a balanced rudder? If it does, you'll have adverse couple<BR>with what the manual calls for.<BR>Good luck.<BR>G.<BR><BR>Ted Sander wrote:<BR><BR>> It's flying season, and for all sorts of poor reasons, I'm just now getting<BR>> to boring holes for my wing tubes in my scratch built Edge 540. While not<BR>> pure pattern, I hope to get it to come in "pattern legal", so I can use it<BR>> as a dual purpose intermediate plane for our few local pattern and IMAC<BR>> contests. Wing is 1 3/4 " below thrust line, stab 1" below. Standard<BR>> straight leading edge (what makes it an "Edge"). Original plan was no<BR>> dihedral at all (centerline of tips on same plane as the root). Now I'm<BR>> starting to question myself. Realizing that there are lots of things that<BR>> contribute to roll coupling I haven't included here, anybody have rough<BR>> guidelines on a starting place for the dihedral angle to build in, if any?<BR>> Plane will have most of the provisions for getting it dialed in - wing/stab<BR>> adjusters, even a way for moving stab up or down, if needed. Dihedral will<BR>> have to be built in. If the rest of the plane proves itself out, I have no<BR>> issue fine tuning the design in the future by cutting new wings - but would<BR>> like to at least get it sort of close for this first attack. How much<BR>> dihedral does a Focus have, for example? Any words of wisdom if I should<BR>> increase or decrease it due to the effective forward taper of the wing?<BR>> Thanks in advance for any advice.<BR>><BR>> =====================================<BR>> # To be removed from this list, send a message to<BR>> # discussion-request@nsrca.org<BR>> # and put leave discussion on the first line of the body.<BR>> #<BR><BR>Ted Sander wrote:<BR><BR>> It's flying season, and for all sorts of poor reasons, I'm just now getting<BR>> to boring holes for my wing tubes in my scratch built Edge 540. While not<BR>> pure pattern, I hope to get it to come in "pattern legal", so I can use it<BR>> as a dual purpose intermediate plane for our few local pattern and IMAC<BR>> contests. Wing is 1 3/4 " below thrust line, stab 1" below. Standard<BR>> straight leading edge (what makes it an "Edge"). Original plan was no<BR>> dihedral at all (centerline of tips on same plane as the root). Now I'm<BR>> starting to question myself. Realizing that there are lots of things that<BR>> contribute to roll coupling I haven't included here, anybody have rough<BR>> guidelines on a starting place for the dihedral angle to build in, if any?<BR>> Plane will have most of the provisions for getting it dialed in - wing/stab<BR>> adjusters, even a way for moving stab up or down, if needed. Dihedral will<BR>> have to be built in. If the rest of the plane proves itself out, I have no<BR>> issue fine tuning the design in the future by cutting new wings - but would<BR>> like to at least get it sort of close for this first attack. How much<BR>> dihedral does a Focus have, for example? Any words of wisdom if I should<BR>> increase or decrease it due to the effective forward taper of the wing?<BR>> Thanks in advance for any advice.<BR>><BR>> =====================================<BR>> # To be removed from this list, send a message to<BR>> # discussion-request@nsrca.org<BR>> # and put leave discussion on the first line of the body.<BR>> #<BR><BR>=====================================<BR># To be removed from this list, send a message to <BR># discussion-request@nsrca.org<BR># and put leave discussion on the first line of the body.<BR>#<BR><BR></BLOCKQUOTE></BODY></HTML>