Dynon Avionics EFIS-D100 Pilots Users Guide - Manual (Page 54)

HSI Operation
externally using the knob that is on the SL-30 when in VOR mode. When in ILS mode, the SL-30 disables th
OBS knob, and thus you must use the soft keys below the HSI in order to set the course. e
When using the HS34 you can set the OBS using the COURSE knob. When properly configured, the HS34
ng an SL-30, the
rm
ll
s the
, then that is a "to" indication. If it is pointing the opposite direction of
degrees
lid as defined
sends course information to the NAV radio, just like a mechanical HSI or CDI does. When usi
HS34’s knob must be used to set the OBS; the SL30’s OBS is overridden by the course info
the HS34.
3. Course Deviation Indicator (CDI). When tuned to a VOR, the CDI indicates how far to the
left or right of your selected radial you are. Full scale deviation indicates ten degrees of
deviation from the radial that has been chosen as the course. When tuned to a localizer, fu
scale represents 2.5 degrees of deviation. When on course, the course indicator and the CDI
ation sent out by
make a solid line, making it easy to see when there is little error in your aircraft's position.
Unlike a CDI indicator found in basic aircraft, the CDI needle on an HSI rotates with the
DG and course indicator. By turning the aircraft towards the CDI needle you reduce your deviation.
4. To/From indicator. Because an HSI rotates the course line on top of the DG, the to/from indicator
always points TO the physical VOR or localizer transmitter. If it is pointing the same direction a
arrow at the end of course line
the arrow at the end of the course line, then that is a "from" indication. This data comes from the
to/from flag indicator provided by your Nav radio. In the image above, the to/from indicator is
showing a “from” indication.
5. Glideslope Indicator. This appears only when tuned to an ILS. It displays deviation as 0.5
when deflected full scale. This does not have an indicator on it unless the glideslope is va
by the glideslope flag.
EFIS-D100 Pilot’s User Guide 6-5