ORIGINAL: pimmnz
Having both wings at the same rigged angle will not affect the model. It is the difference between the tail plane and the wing that will, in effect, set the cruise speed. The rigged angle of all these wings to the fuselage datum will determine what angle the fuselage appears to fly at. And that depends on the completed models weight. Simple, eh! Hmm...
Evan, WB #12.
Not true I have built and flown at least 7 Aeromasters, three Lazy Aces (one large and two 40 size), several Moths plus many more. All my bipes flew best when the upper wing was at about 1.5 degrees less angle of attack than the lower one. I did many tests on the Aeromasters and found this to be true on all of them. Things got especially bad when the upper wing had a higher angle of attack than the lower one, on some you could not fly level as the plane would oscillate like it was searching for a neutral position. If you have the time, do a little experimenting, you will find that there is a sweet spot for your type of flying.