text: limitatiar of the pmpcllcr are 
  those of the Rower- 
  closely associated with 
  plant. Overspeed conditions are critical be- 
  cause of the large centrifugal loads and blade 
  twisting moments produced by an excessive 
  In addition, the propeller 
  rotative speed. 
  blades will have various vibratory modes and 
  certain operating limitations may hc necessary 
  to prevent exciting resonant conditions. 