BRAKING  PERFORMANCE. .........................................  Friction cbaracte~istics  Braking technique  Typical errors of braking technique  REFCTSAL  SPEEDS  ,  LINE  SPEEDS, AND  CRITICAL  FIELD  LENGTH.  .............................................................  Refusal speed  Line speeds  Critical field length, multi-engine operation  SONIC BOOMS.  .......................................................  Shock waves and audible sound  Precautions  HELICOPTER PROBLEMS.  ...........................................  Rotoraerodynamics .....................................................  Retreating blade stall ...................................................  Compressjbility effects  ..................................................  Autorotatton charactertsttcs  .............................................  Powersettling .........................................................  THE FLIGHT  HANDBOOK.  ........................................  SELECTED  REFERENCES.  .....................................  Iklr\C”  ,,“YL)\ .......................................................  Pam  387  391  396  399  400  402  404  405  408  411  413  414  NAVWEPS 00-BOT-BO  TABLE OF CONTENTS  xvi 