text: where 
  
  v,+= stall speed at some bank angle + 
  
  V,= stall speed for wing level, lift-equal- 
  
  weight flight 
  
  n=load  factor corresponding to  the 
  
  bank angle 
  
  The percent increase in stall speed in a turn is 
  Since this chart is predi- 
  shown on figure l.i6. 
  cated on a steady turn and constant CL,, 
  the 
  figures a!e valid for any airplane. The chart 
  shows that no appreciable change in load fac- 
  tor or stall speed occurs at bank angles less than 
  30“. Above 4S” of bank the increase in load 
  factor and stall speed is quite rapid. This fact 
  emphasizes the need for avoiding steep turns at 
  low airspeeds-a flight condition common to 
  stall-spin accidents. 
  
  37 