text: low aspect ratio, sweepback, and high wing 
  loading. Since these airplane characteristics 
  also produce marginal flare capability in power- 
  off flight, great care should be taken to follow 
  the procedure recommended for the specific 
  airplane. 
  
  As an example of the power-off glide per- 
  formance of an airplane with low aspect ratio, 
  loading, a best 
  sweepback, and high wing 
  glide speed of 220 knots and a glide ratio of 6 
  may be typical. 
  In such a case, the rate of 
  descent during the glide at low altitude would 
  be on the order of 3,700 FPM. Any deviations 
  from the recommended landing technique can- 
  not be tolerated because of the possibility of an 
  excessive rate of descent. Either premature 
  flare or delayed flare may allow the airplane to 
  touch down at a rate of descent which would 
  cause structural failure. Because of the mar- 
  ginal flare characteristics in power-off flight, 
  the best glide speed recommended for the land- 
  ing configuration may be well above the speed 
  corresponding to the exact maximum lift-drag 
  ratio. The greater speed reduces induced drag 
  and provides a greater margin for a successful 
  power-off landing flare. 