PART 1II-HANDLING

         (ii) Rudder trimmer.  The rudder trimmer is awkward to
              operate but is effective at high airspeeds.
    
    (c)  Airbrakes

         The airbrakes are effective and will open fully at any speed.
         They make the aircraft less pleasant to control laterally.
         At speeds above 460 knots buffeting may be severe.  When
         descending with the airbrakes out, throttles closed, the rate of
         descent is high and altimeter errors will be considerable.
         Before closing the airbrakes, the angle of dive should be
         reduced.
         
    (d)  Changes of trim

         Increase in power		Strong nose-up

         Increase in speed		Strong nose-up
         
         Operating flaps, under-	Negligible
           carriage or airbrakes
         
         WARNING.- Because of the strong nose-up change of
                   trim with increase in speed, elevator forces
                   must be trimmed out up to the maximum
                   speed attained and pull forces must be
                   applied with care.  It is possible to cause
                   excessive G loading by flying the aircraft
                   out of trim.
    
    59.  Endurance

         If it becomes necessary to fly for best endurance, the
         following broad rules should be applied:-

    (a)  If at 25,000 feet or above, maintain height.

    (b)  Below 25,000 feet, with 300 gallons or more remaining,
         climb to 25,000 feet.

    (c)  Below 25,000 feet, with less than 300 gallons, use only one
         engine and do not climb.
    
    60.  Flying at reduced speed

         Reduce speed to 170 knots.  At this speed handling is
         easier if 1/3 flap is used.

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