Pipistrel Virus SW 121, Pilot Operating Handbook

Page: 159 / 226

7-27
Virus SW 121
Pilot Operating Handbook
POH-121-00-40-001
PAGE REV. 0
PAGE
SECTION 7
AIRPLANE DESCRIPTION
APPROVED
7.14.1 ATTITUDE DIRECTION INDICATOR (ADI)
Air Data
The airspeed tape to the left of the main ADI begins indicating at 20 Knots
Indicated Airspeed (KIAS) and is color-coded to correspond with airspeeds
for V
SO
, V
FE
, V
S
, V
NO
, and V
NE
. An altitude tape is provided to the right of the
main ADI and also displays a symbol for the Altitude preselect (Altitude bug).
The Vertical Speed Indicator (VSI) is displayed to the right of the altitude
tape. The displayed scale of the VSI is +/- 2000 ft/min. An additional data
blocks are provided for display of outside air temperature (OAT), true air-
speed (TAS), and groundspeed (GS). Controls for selecting bug and baromet-
ric correction values are along the right side of the PFD.
Attitude Data
Attitude is depicted on the main ADI using an aircraft reference symbol
against a background of labeled pitch ladders and an arced scale along the
top of the ADI to indicate bank angle. A skid/slip indicator is attached to
the bottom edge of the bank angle pointer. The Flight director function inte-
grates into the ADI.
7.14.2 HORIZONTAL SITUATION INDICATOR (HSI)
Heading Data
Magnetic heading in the PFD is represented in boxed numeric form at the left
of the compass rose and the top magnetic heading strip. Heading rate (Rate
of Turn Indicator) takes the form of a purple trend vector, begins behind the
magnetic heading indicator and moves left or right accordingly. Graduations
are provided on the rate-of-turn indicator scale to indicate half and full stan-
dard-rate turns. A heading bug is also provided on the compass rose and the
heading strip above the attitude indicator.
Navigation Data
Navigation data on the PFD takes several forms. A course deviation indicator
(CDI) is always provided on the HSI and a bearing pointer can be optionally
selected for display on the HSI by the pilot. Controls for selecting the source