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
|