
wingDesigner^{4} 

The wingDesigner^{4}
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: 


(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 
