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The EFIS Horizon
Series I Primary Flight Display page features:
• Highway In the Sky Guidance – effortless
and intuitive 3-dimensional guidance
• Vertical Guidance – Never miss an assigned altitude,
or begin a descent too late.
• User Defined Approach – Vertical and lateral guidance
for ILS like approaches to any airport.
• Digital and graphical display of GPS data
• Unlimited Pitch and Roll – no gimbal limits!
• Slaved Directional Gyro – No manual input required!
• Airspeed, Altitude, and Vertical Speed – No delicate
mechanical movements.
• True Airspeed–
• Density Altitude–
• Outside Air Temperature --
• Wind Speed and Direction – Continuously computed.
• G-meter
• Complete engine monitoring – Graphical displays to
enhance pilot awareness of engine operation.
• Moving Map – with gyro-stabilized for smooth, no jerk
screen updates.
• Altitude Encoder with Serial and Grey Code outputs.
• High speed processor for smooth and seamless (no jerk) display.
• User-selectable and programmable screens with split screen
or full screen modes
• Alarms and Redlines user settable
Instant Start-up – 15 second gyro alignment time |
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EFIS is an acronym for "Electronic Flight
Information System". The EFIS Horizon
Series I provides primary flight
data (attitude, altitude, airspeed, vertical speed, steering), graphical
engine data, and a moving map. It is designed as a cost-effective replacement
of traditional vacuum-powered mechanical gyros. Unlike mechanical gyros,
no maintenance is required, and installation is much quicker, easier,
and lighter. Aerobatics, vibration, and temperature do not affect the
life of the EFIS, as it is completely electronic.
In addition to these benefits, the EFIS Horizon Series
I provides data not available with mechanical gyros, such a navigation
steering data integrated with the attitude display, an artificial view
of the world showing airports and obstacles just the way they appear
out the window, continuously computed winds, and much, much more.
Its easy to get excited about the functionality of the Horizon EFIS,
but it’s more than just features.
The Horizon EFIS is engineered from the ground up without compromises. Small
details, like a sunlight readable display, wide –15 to +160 deg
F operating temperature range, and an attitude/heading reference system
(AHRS) that is built to aerospace standards could easily go unnoticed…and
that is exactly the idea.
Instead, what you notice is how naturally all flight information is
communicated…how seamlessly navigation and attitude are combined
with a highway in the sky presentation, and the flexibility of the user-configurable
features.
 Even more important are the details that go unnoticed,
such as the continuous built-in test functions, the consideration for
failure modes and effects, the validation
and cross-check of flight critical data...in short the details you
would expect in avionic equipment that gives it the integrity making
it suitable for flight...details some other manufacturers are unaware
of...details that come from our extensive aviation/aerospace experience.
The Horizon EFIS goes far beyond the functions of conventional instruments.
The elimination of mechanical instrumentation provides advantages not
only in the reliability and freedom from maintenance, but also the ability
to provide data not previously available, and in a format that more naturally
communicates the state of the aircraft to the pilot. |
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Designed to Eliminate Vacuum
Systems
The
Horizon EFIS is designed from the ground up to eliminate vacuum systems.
Its low power consumption (0.5 amps), and dual isolated power inputs
(allowing it to be powered by either of 2 buses) pose little demands
on the aircraft’s electrical system
design. This allows for a simple, two bus electrical system, requiring
only a single alternator and our optional charging diode. Actual size:
6.0" D x 4.0" W x 3.375" H, 1.75 lbs
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Engine
data from a
Proven Engine Monitor
Engine data is provided to the
Horizon EFIS via the proven and well-known Engine Information System
line of automated engine monitoring. The
reliability and robustness of the EIS is well established. It has distinguished
itself for its tolerance of both physical (vibration) and electromagnetic
fields (noise from ignition systems, radios, etc.) throughout its 12
years of operational experience. All  engine parameters displayed
on the EIS can be viewed with combination analog and digital displays.
The same leaning and EGT tracking functions that have distinguished the
EIS, are also included in the Horizon EFIS. |
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Automatic Logbook and
Engine Data
Recording
It’s the end of tedious logbook entries. The Horizon EFIS
detects the beginning and end of a flight, and records the date, time, start
and end locations, and time of flight automatically. This data is recorded
in non-volatile memory, and can be reviewed on the display, or downloaded
using via a USB flashdrive.
Extensive engine and air data can also be recorded and downloaded, allowing
precise evaluation of airplane and engine performance, and provides an
outstanding aid for the troubleshooting of intermittent engine problems |
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Independent AHRS Processor
Even a momentary interruption in processing can jeopardize the integrity
of AHRS data. That is why the Horizon EFIS utilizes an processor dedicated
solely to performing AHRS sensor measurement and processing. This processor
does not have the overhead or a large operating system, nor any tasks
unrelated to the calculation of attitude, heading, and related data.
Its designed purely to provide high integrity, high reliability, flight-critical
data. |
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Mode S Traffic Display
TIS based traffic via the Garmin
GTX330 transponder
is available using our optional ARINC
429 interface adapter. The mode S featureavailable at no charge
(the optional Arinc 429 Interface adapter is required however),and
eliminates the need topurchase
a Garmin 430/530 to display traffic provided by the transponder. Our
experience with the traffic provided by the GTX330 has been very positive,
providing much more benefit than simply collision avoidance.
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GPS-Independent AHRS
For obvious reasons of safety, the pitch, roll and gyro-stabilized heading
sensed by the attitude/heading reference system (AHRs) must be of high
integrity. That is why our AHRs is based on high quality sensors, proven
mathematical algorithms, and is not dependent on outside sources, such
as GPS.
Some AHRs are dependent on GPS data for proper operation. Introducing
GPS into the attitude calculations has many
drawbacks. Loss of GPS data can mean unexpected loss of attitude data. Degradation
of the GPS data, such as can occur with various atmospheric or satellite
constellation configurations, due to the re-activation of selective availability,
airframe icing of the GPS antenna, interference from radar, etc., can
have unexpected effects on attitude data which relay upon it. Redundancy
is meaningless in aircraft that use 2 AHRs systems which are both GPS
dependent. In short, attitude data should not be dependent
on GPS, or any other sensor source whose integrity or availability
cannot be assured.
Magnetometers (flux gates) provide the heading reference source needed
to allow independence from GPS data. This is the reason a magnetometer
for sensing magnetic heading is a standard with the Horizon EFIS. Our
attitude data is based on its own sensors, including a 3-axis
flux gate sensor, and 3-axis accelerometers, and 3-axix angular rate
gyros, and is not dependent any external signals, such as
GPS. Loss of GPS data will not result is loss of attitude data
with the Horizon EFIS. It is perfectly acceptable to operate the
Horizon EFIS without any GPS data.
For fully independent AHRS, such as the Horizon EFIS, GPS data can aid
in the self-testing of the AHRS system. In effect, the addition
of GPS data, along with the fully independent AHRS set of electronic
gyros, magnetometers, and accelerometers, provides more data than is
required for the calculation of attitude and heading. The Horizon
EFIS takes advantage of this data redundancy by using sophisticated mathematical
algorithms that are able to provide self-testing of the AHRS system whenever
GPS data is available…even
when taxiing. |
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Moving Map
The EFIS Horizon moving map is intended to provide
the data necessary for VFR flight. Free database updates are available
from our website. Database regions and detail levels can be selected
by the user to provide the area of coverage vs. detail desired. Databases
are available for all U.S. airports, obstructions, all
airports worldwide over 3000 feet, as well as worldwide data for navaids, airspace,
and minimum sector altitudes. The moving map will also display any
user-created waypoint selected on your GPS as the current goto. This
provides an excellent improvement over the limited display used on
many hand held or panel mount GPS receivers. It also adds top-of-climb
and top-of-descent indicators, winds, and waypoint data. An
optional internal WAAS GPS from Garmin is also available.
Two other moving map modes are also provide, both
which show the aircraft position in the middle of the screen, and a
360 degree compass rose around the airplane. The first of these two
screens allows you to see airports and navaids that are behind, as
well as in front of the airplane. When the aircraft is not moving,
the magnetic heading up mode (instead of the usual ground track up)
is used to show runway orientation based on the direction the airplane
is currently pointing. This can be quite helpful when taxing to runways
at unfamiliar airports.
The third moving map mode is the equivalent of an
HSI function, with moving map features also displayed. The HSI
provides 2 VOR bearing pointers, GPS course, and localizer/glideslope
displays.
Navigation inputs are provided for two navigation radios (VOR/ILS),
and two GPS inputs. The navigation modes are easily selected from the
softkeys. The ability to select the navigation mode from the EFIS allows
consistent navigation data, steering, and auto-pilot coupling. |
Specifications:
Max Angular
Rate: 200 degrees/second, all axis simultaneously.
Pitch and Roll Angles Range : Unlimited
Operating Temperature Range: -15 to +160 deg F ( -25 to +70 deg
C)
Storage Temperature Range: -25 to +185 deg F (-30 to + 85 deg C)
Maximum rate of change of temperature: Unlimited
Long Term Reference : Accelerometer and Magnetometer (not GPS dependent
- functions without aiding of any type)
Display: Direct sunlight readable, backlit, wide temperature range,
transflective display (not dependent on high power backlights for sunlight
readability) Min Backlight intensity : 3 nits.
Airspeed Ranges : Low speed version is 35-290 mph indicated, and the
high speed version is 50-600 mph indicated.
Altimeter: -1000 to +35,000 feet. Meets IFR accuracy requirements.
Magnetic Heading : <5 degrees error – gyro-stabilized
MFD Physical Dimensions:
Overall Size of Faceplate : 7.25" wide
x 4.75" high
Size of opening required in instrument panel : 6.25" wide
x 4.65" high.
Maximum Depth 3.0"
Weight: 2.25 lbs
Electrical Requirements:
12V Version : 9-20 Vdc 1.5 amp
28V Version : 18-36V 1.0 amp
Isolated, triple power inputs are provided. |
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Avionics - Flight Data Computers
