> > > How close a fit should they be to the spar? If it's a tight fit > then changing the incidence changes the angle of the spars to each > other. If it's a looser fit then the wing can be tipped forward > without changing the angle of the spars to each other. I >Russ Kendall +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
The spar(s) will always remain at 90 degrees to the longerons. The incidence is determined by how the ribs are cut. The incidence angle is determined by the cord line on the rib and the angle it goes through the spar on the drawing. If you want to change the angle, re-draw the spar on the rib to the angle you want, then cut and place components accordingly. Look closely at the rib drawing and you'll get the picture. Larry 'Flesner
