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                           PART 1II-HANDLING

    (d)  High-speed, low-level flying

         During high-speed runs near the ground, if the aircraft is
         out of trim (nose-up) and a heavy pull-force is applied for
         the pull-out, excessive G may be induced, resulting in
         structural damage.  For this reason, stick forces must be
         trimmed out up to the maximum speed attained and great
         care exercised when applying pull-forces.  If the angle of
         dive near the ground is greater than 10°, the maximum
         permissible speed is 400 knots.  The angle of dive in ground
         attack must not exceed 45°.

    65.  Aerobatics

         Until experience is gained, the following speeds in knots
         are recommended:-

             Roll	..	..	..	..	260-280
             Loop	..	..	..	..	370-380
             Roll off the top	..	..	..	380-400
             Climbing roll	..	..	..	390 plus
             Stall turn	..	..	..	..	280-300

         In manoeuvres in the looping plane, much height may be
         gained or lost and an ample margin must always be
         allowed for regaining normal flight.  With experience, the
         above speeds can be reduced considerably.
         
         NOTE:-The negative G traps in the main tanks ensure a
               supply of fuel for 45 seconds inverted flight; this
               must not be exceeded owing to the possibility of
               oil starvation.  If a ventral drop tank is fitted,
               aerobatics must not be carried out unless it is
               empty.  If wing drop tanks are fitted, aerobatics
               are prohibited.
               
    66.  Descent

    (a)  Gliding

         Glide at 170 knots at all heights for maximum range.  The
         distance covered in the glide will be approximately 2 miles
         per 1,000 feet of height loss.
         
    (b)  Fast rate

         Set 11,000 r.p.m. (12,500 asymmetric), airbrakes out, and
         maintain 250 knots.  The rate of descent will be 4,500-
         5,000 ft. per minute.

49

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