>If you raise your rear centre spar above the lower longerons by about 5/8" and leave the main centre spar sitting on the longerons you can obtain the following advantages: >The Martindale Family ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
This 5/8" measurement could be a "shot in the dark" as each KR might be different. The rib drawings in the plans have the spars and cord line drawn with the cord line intersecting the spars at a 3 1/2 degree angle. If one redraws the the spars on the ribs to have the cord line intersect the spar at the angle of their choosing, and then use the ribs to set the rear spar, it should take all the guesswork out of the proceedure. Note that the front spar is plumb when the firewall is plumb. Using the firewall as a reference allows the builder to set the wing properly without the top longerons even entering the picture. Also note that the horz stab is "level" when the firewall is plumb. Assuming that is the correct angle for good handling, it allows the builder to set the horz. stab with a level also. It worked for me and eliminated the guesswork of how much to raise the forward spar on the horz stab and eliminated any reference to the "banana boat" top longerons. I'm not sure why builders want to complicate it beyond that with using complicated math and measurements. As I stated many times before, I was able set my wing to within 1/10th of a degree using just two bubble levels. I can't imagine it getting any easier than that. Larry Flesner Carterville, Illinois
