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PART I-DESCRIPTIVE

     (e)  With reheat in use, total fuel consumption at all altitudes
          is about 2½ times that of normal full throttle conditions.
          The increase in sea level static thrust is about 30%.  In
          flight the thrust increase is about 50% at sea level
          increasing to about 60% at 40,000 ft. The total effect is
          to increase specific fuel consumption by about 70%.


     11.  Reheat controls and indicators

     (a)  Controls

          These consist of:-
          
          (i)  The reheat L.P. cock (28) which controls the flow
               of fuel to the reheat pump.

         (ii)  A REHEAT EMERGENCY SHUTOFF SWITCH
               (47) which acts as a master switch and which must
               be at NORMAL at all times when reheat is in use.
               Reheat cannot be brought into use with the switch in
               the SHUT-OFF position.

               Note.-The word "EMERGENCY" is incorrectly
                     included in the labelling of this switch and
                     will be deleted by modification.

        (iii)  The throttle lever which, when moved into the
               reheat gate, closes a second switch to complete the
               reheat electrical circuit.

     (b)  Indicators
     
          These consist of:-

          (i)  A jet-pipe eyelid magnetic indicator (43) which
               shows black if the eyelids are in the correct position
               for the particular running condition selected and
               white while the eyelids are changing position, or if
               they are in the wrong position.

         (ii)  An amber warning light (48) which comes on if the
               temperature in the space between the jet pipe and
               its outer casing in zone 3 exceeds 300 ± 30°C.
               (See para. 13.)

16

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