A Wing Design Method for Aerospace Students and Home Builders: Strength, Weight, Flutter, Divergence, Buckling, Deflection, and Twist
Marty Ferman has developed a wing design method for use by Aerospace students in their senior design classes, and for the Home Builders of aircraft. The method allows for rapid determination of strength, weight, flutter, divergence, buckling, deflection, and twist. The method allows for preliminary design phase for a basic sizing, and then the interim and final phases follow to fill out the structure to a fabrication level. The flutter and divergence aspects are rarely covered in most design books, so there can be enhanced safety. The method presents a unique representation for the preliminary design phase where the wing skin thickness is a key factor readily found and used for the stiffness and weight calculations. Here the user can see what is needed. The method uses many closed-form expressions for the straight, unswept cantilevered wing of constant spanwise properties, with suggested forms for the non-uniform wing. This method was evolved by Ferman during his fifty-six years in Aerospace Industry and Academia.
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Aerodynamic Center Aerospace Students aircraft bending and torsion bending deflection bending stress body write Buckling due buckling load deflection and twist distributed divergence calculations divergence speed edge loads elastic axis equation equivalent Ferman fixed edges flutter and divergence flutter calculation flutter frequency flutter solution flutter speed Fraction of Chord Giromill Home Builders idealization in-lb inboard lb/in leading edge lift Likewise Louis University main body mode shape models Modulus of Rigidity needed Note Number NYY)CR outboard outer edge panel Parks College pinned and fixed rad/sec Ratio refined rib spacing root stresses shear Shear Modulus sign convention skin thickness span wise spars tapers Theodorsen correction tip twist torque torsion frequencies torsional stress upper skins VF/VD weight factor weight prediction Wind Tunnel Wing Design Method wing twist wing weight