text: moment about the lateral axis is studied in 
  the coefficient form. 
  
  M = C,qS(MAC) 
  
  or 
  
  M 
  
  &= qS(MAC) 
  
  where 
  
  M=pitching moment about the c.g., ft.- 
  lbs., positive if in a nose-up direction 
  
  q= dynamic pressure, psf 
  S= wing area, sq. ft. 
  MAC=mean aerodynamic chord, ft. 
  C,= pitching moment coefficient 