VERTICAL SPEED INDICATION
Vertical speed data is developed in the AZ-950 Micro Air Data Computers, which sense the rate-of-
change of altitude from inputs of the static system. The computers convert the data into digital form
and transmit it through the digital data bus system to the IC-615 Display Guidance Computers, which
forward it to the DU-1080 Primary Flight Displays where it is generated into a visual display.
The vertical speed display is a fixed-scale, meter-movement type display; a pointer rotates about a
point which is outside of the actual display. The range of the vertical speed indicator is 0 to ±6000
feet per minute. The scale is non-linear, which provides increased resolution between ±2000 feet per
minute. A digital readout of the actual vertical speed is displayed above the scale when ascending
and below the scale when descending. The digital readout has a resolution of 50 feet per minute.
The digital readout does not appear for vertical speeds of ±300 feet per minute or less, leaving only
the meter type display.
ROLL POINTER/SLIP SKID DISPLAY
The slip skid display is located at the top of the attitude display of the PFD and SFD. Coordinated
flight is depicted as an alignment of the triangle with the associated rectangular block directly under
the triangle.
MAGNETIC COMPASS
Magnetic heading is displayed on the SFD.
RAM AIR TEMPERATURE INDICATOR
Ram air temperature is displayed on the MFD and on the AMLCD.
VERTICAL SPEED DISPLAY
Figure 3-4
Cessna Citation XLS - Instrumentation & Avionics
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