Reference and Specification
6 - 6
K114 Issue No. 9
RATE
In aeronautical units (kts, km/h), this key selects a rate of change of airspeed (Rate CAS)
display.
In pressure units (mbar, inHg etc.), this key selects a rate of change of pressure (Rate
Qc, Rate Pt or Rate EPR) display. The actual display depends on the parameter selected
before pressing RATE.
The following rates are available in aeronautical units:
* Rate CAS is displayed with the airspeed in either CAS or TAS.
The following rates are available in pressure units:
If set-up mode is not switched off, SETUP, [UNITS] can be used to change the units of
display.
A new rate aim can be entered using the numeric keys, if the unit is in Control Mode
(Aim displayed). Use LEAK MEASURE/CONTROL to change between Control and Leak
Measure mode.
If the automatic airspeed rate is selected (using SETUP, RATE) the airspeed rate is
automatically adjusted to simultaneously achieve both altitude and airspeed aim
values. This adjustment normally requires a reduction in the rate from the aim value;
the rate does not exceed the aim value. When airspeed (not Qc) is automatically
reduced, the display shows (A) after RATE CAS.
LEAK MEASURE/CONTROL
This key switches between Control and Leak Measure mode.
Note: The pneumatic supply pumps must be switched on before going to CONTROL mode.
Key-press sequence Rate of change display
Qc, RATE Rate Qc
Pt, RATE Rate Pt
EPR, RATE Rate EPR
Key-press sequence Rate of change display
SPEED, RATE Rate CAS *
MACH, RATE Rate MACH
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