text: NAVWEPS 00-8OT-80 
  AIRPLANE PERFORMANCE 
  
  the 
  important-if 
  not more important-as 
  increased stall speed in turning flight. 
  It is 
  important also that any turn be well coordi- 
  nated to prevent the increased drag attendant 
  to a sideslip. 
  
  TURNING PERFORMANCE. The hori- 
  zontal component of lift will equal the centrif- 
  ugal force of steady, turning flight. This fact 
  allows development of the following relation- 
  ships of turning performance: 
  
  turn radius 
  P 
  
  r= 11.26 tan 6 
  
  where 
  
  r= turn radius, ft. 
  I’= velocity, knots (TAX) 
  ti = bank angle, degrees 
  
  ttrrn rate 
  
  ROT= 1,091 tan rb 
  V 
  
  where 
  
  ROT=rate of turn, degrees per sec. 
  
  $= bank angle, degrees 
  knots, TAS 
  v=velocity, 
  
  These relationships define the turn radius, I, 
  and rate of turn, ROT, as functions of the two 
  principal variables: bank angle, +, and velocity, 
  (TAX). Thus, when the airplane is flown 
  I’ 
  the steady, coordinated turn at specific 
  in 
  values of bank angle and velocity, 
  the turn 
  rate and turn radius are fixed and independent 
  of the airplane type. As an example, an air- 
  plane in a steady, coordinated turn at a bank 
  angle of 45’ and a velocity of 250 knots (TAS) 
  would have the following  turn performance: 