Gloster Meteor T.7 met7pic019


                           PART 1-DESCRIPTIVE

         in the system reduces the operating pressure to 220 lb/sq.
         in.  This pressure is further reduced to 120 lb/sq.in. by the
         brakes relay.

    (b)  A triple-pressure gauge (8) on the front cockpit port wall
         shows the pressure in the air storage cylinder and the
         pressure available at each brake.

    15.  Vacuum system    
    
         A vacuum pump on each engine provides suction for the
         operation of the artificial horizon, direction indicators
         (rear cockpit only post Mod. 1177) and turn and slip indi-
         cators (pre-Mod. 1228).   If one pump is not running, the
         other pump output is sufficient to serve all instruments;
         there is no changeover cock or suction gauge.

    16.  Electrical system    
    
    (a)  D.C. Supply
    
         Two 3 kw generators, one on each engine, supply the
         24-volt electrical system and charge the two 12-volt air-
         craft batteries which are connected in series.   The generator
         cut-in speed is approximately 5,000 r.p.m.   Two generator
         failure warning lights may be on the front cockpit instru-
         meant panel (post Mod. 1225).

    (b)  External battery
    
         The external battery socket is in the port wheel well, with
         the ground/flight switch beside it.   Also at this station is a
         voltmeter (or, post Mod. 1431), a voltmeter socket) to
         measure the output of the generator, aircraft batteries or
         external battery.   The ground/flight switch, when set to
         GROUND, isolates the batteries and the generators from
         all electrical services except, post Mod. 1537, the high
         energy ignition circuit (Derwent Mk.9).   On post-Mod.
         1537 aircraft, the peak starting load is taken by the internal
         batteries while, with the ground/flight switch at GROUND.
         the remainder of the load is taken by the external battery.
         
         NOTE.-If the external battery is disconnected before the
               ground/flight switch is moved to FLIGHT, the
               j.p.t. gauge may be damaged.