maximum lift 
OPERATION OF HIGH LIFT DEVICES. 
The management of the high lift devices on an 
airplane is an important factor in flying opera- 
tions. The devices which are actuated auto- 
matically-such as automatic slats and slots- 
are usually of little concern and cause little 
complication since relatively small changes in 
drag and pitching moments take place. How- 
ever, the flaps must be properly managed by 
the pilot to take advantage of the capability