Aspen Avionics Evolution Backup Display EFD1000 - Page 79

CHAPTER 4 REFERENCE GUIDE
Page 4-10
091-00027-001 REV A Evolution Backup Display Pilot’s Guide
Page 4-11
091-00027-001 REV A
Indicated airspeed is displayed in knots, miles per hour or Mach number, set at
installation, with tick marks rendered on the Airspeed tape every ten (10) units. Speed
Bands and Speed Markers are congured during installation and cannot be changed or
removed by the pilot. The textual Vspeeds are pilot-congurable and are discussed in
Chapter5,CustomizingtheEBD.
The numerical airspeed value is displayed in a rolling drum format in the center of the
airspeed tape with numbers moving downward as speed increases, and upward as
speed decreases. The display range of the indicated airspeed is 20–450 (knots or miles
per hour). The numerical airspeed value is displayed in red when Vne is exceeded or
when the airspeed drops below Vs0 during stalls or landing roll-outs (Figure 4-7).
Figure 4-7
Actual Airspeed Greater Than the Vne
Figure 4-8
Pitot Obstruction Monitoring
Airspeed <30kts, Ground Speed >50kts
Annunciation
NOTE
When airspeed is less than 30 knots but ground GPS speed is greater than 50 knots, a
red X and annunciation of CHECK PITOT HEAT is displayed on the Attitude Indicator
(Figure 4-8).
091-00027-001 Rev A EBD Pilots Guide V&H .indb 11 8/27/14 8:51 AM