wingDesigner4 The wingDesigner4 of eCalc.ch visualizes your four panel wing design and evaluates the center of gravity (CG).   It has been found both experimentally and theoretically that, if the aerodynamic  force is applied at a location of 25% of the Mean Aerodynamic Cord (MAC), the magnitude of the aerodynamic moment remains nearly constant even when the angle of attack changes. This location is called the wing's Aerodynamic Centre AC. It is of crucial importance that the Flying Wing Centre of Gravity (CG) is located at the right point, so that a stable and controllable flight can be achieved.   The optimal CG must be evaluated in flight. For safety start evaluation always with a static margin of 5...15% for a good longitudinal stability and use resulting CG. Never ever exceed AC on first flight!         Units:   mm cm dm inch ft (if less than 4 panels required, define panel span = 0 starting from the far right with W4) Root chord [R]:   cm Tip chord [T1 - T2 - T3 - T4]:   - - - cm Sweep [S1 - S2- S3 - S4]:   - - - cm Panel span [W1 - W2- W3 - W4]:   - - - cm AC position:   % MAC Static margin:   % MAC     CG [●]:   8.23 cm AC [●]:   9.71 cm MAC @ Distance   14.86 cm @ 14.86 cm Wingspan:   8.23 cm Wing Area:   980 cm² Aspect Ratio   5   we reject any liability - usage on own risk Version 1.06