text: specified as certain necessary values of the roll 1 
  
  helix angle, &I$ However, in certain condi- 
  
  it may be more appropriate to 
  tions of flight, 
  specify minimum 
  the airplane to 
  times for 
  accelerate through a given angle of roll. 
  
  Usually, the maximum value of 2% should be 
  
  on the order of 0.10. Of course, fighters and 
  attack airplanes have a more specific require- 
  ment for high rolling performance and 0.09 
  Pb 
  may be considered a minimum necessary 2v. 
  
  Patrol, transport, and bomberairplaneshaveless 
  requirement for high rolling performance and a 
  Pb 2-V of 0.07 may be adequate for these types. 
  
  The ailerons or spoilers must be powerful 
  
  Pb 
  enough to provide the required rV’ While 
  
  the size and effectiveness of the lateral control 
  devices is important, consideration must be 