PART III - HANDLING
    (b) On the climb                  

         (i)   High forward speeds at low altitudes may reduce
               max. r.p.m. by as much as 100.   This coupled with
               the effect at (a) (i) may cause the r.p.m. at the
               commencement of the climb to read as much as 150
               less than the static ground figure.  This condition
               will disappear as the climb progresses.
              
         (ii)  Max. r.p.m. may also be reduced if the top temp.
               controller comes into operation.  On some engines
               the temperature controller reaches the limit of its
               control at altitudes above 40,000 ft. when climbing
               at full throttle.  It therefore becomes necessary to
               close the throttle slightly to maintain j.p.t. below
               685°C.

          NOTE.- Until Mods. 372 and 438 are embodied, care
                 must be taken to ensure, by throttling back if
                 necessary, that at all altitudes the max. per-
                 missible j.p.t. is not exceeded.
                
         (iii) During a climb at full throttle r.p.m. will increase
               gradually but must not be allowed to exceed 8,100
               r.p.m.  When climbing at intermediate power it is
               necessary to close the throttle gradually as altitude
               is gained to maintain 7,800 r.p.m.
                
    (c) In flight                  

        (i)   At intermediate throttle settings differing combina-
              tions of airspeed and ambient air temp. may cause
              the selected r.p.m. to vary.  It will then be necessary
              to adjust the throttle to maintain a constant figure.
                
        (ii)  With the throttle fully closed, the idling r.p.m.
              increase with altitude and with increasing airspeed.
              
        (iii) Negative G must not be applied for more than 15
              secs.
              
        (iv)  It is recommended that movement of the throttle
              should be smooth and progressive.  However, rapid
              throttle movements can be made at any altitude if
              necessary, but the A.C.U. will automatically control
              the rate of r.p.m. acceleration.              

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