| Hi and thanks for any input... After polling some of my local building soaring heros, and receiving different answers, I have decided to poll the message board. My question, I read and re-read Dave Thornburg's book "Old buzzard's soaring book". I can't seem to find the answer to my question. I am designing a scratch plane, I have all of my numbers that I have gathered from the design chapters of Thornburg's book. He references the airfoil angle as "Angle of attack-(summarized) the wing roots of any pre-molded fuselage are usually around 4-6 degrees positive to the center line, fuselages of course cannot hold the wing at this angle, that is the job of the stabilizer..." ? Decalage, how do you plan it into the plane? If the answer is determined by the airfoil let's use the s3021, with an aspect ratio of 10%. What's the answer to the angles, for airfoil to datum line, and stab to datum line, for optimum duration? (As always, all responses will recieve the respectful thanks that they deserve.) Paul Cox Louisville, KY LSF1/LASS -in regards to soaring-"The truth will set you free!...or get you committed ..." |
