Copyright © 2016 Grand Rapids Technologies, Inc.
Electronic Flight Instrumentation for Experimental Aircraft Since 1991
Designed for Redundancy
The HX is a no-
No Interpretation Required
IFR and VFR flight is intuitive. While on the approach, you see the runway on the screen. You feel the cross-
Full interfacing to IFR GPS navigators, such as the G430/G650 is always available via the optional ARINC 429 interface.
Dual screens were never an after-
Below are two HXs as they are configured after initial climb-
Often the days we fly do not require constant monitoring of the airplanes attitude. Airspeed, altimeter and a map are all we need, with the PFD attitude to back us up if conditions change. We love those days and so does the HX! That is why we allow you to show airspeed and altimeter tapes on your moving map.
The greatest value of obstacle alerting occurs when you find yourself forced to fly under an overcast in less than desirable visibility. At times like this, it must be effortless to understand such threats. That is why we show your threats on the PFD and not just the map. We show you the threat in the exact place you will be looking–the PFD. They appear in the same location out the window as they appear on the screen. Simple, and potentially life saving.
The Source of the Attitude
The integrity of an EFIS is dependent on the integrity of the attitude data that drives it. GRT Avionics has always lead the way with the only AHRS in the industry that can operate without airspeed or GPS aiding. Read more about the latest generation of AHRS here.
Sectionals, Airport Diagrams, En-
…can be displayed with the airplane position geo-
Comprehensive Engine Monitoring
Having produced the EIS engine monitor for over 20 years, we’ve accumulated a great deal of personal and customer engine monitoring experience. From this came such exclusive features as the exhaust gas temperature (EGT) time history. A simple graph of the last two minutes of all EGTs, our engine monitoring system makes it effortless to distinguish between engine problems affecting one cylinder, or the entire engine. This distinction could be essential when making decisions in response to engine problems, especially at critical times such as initial climb out. We find it so useful that we never takeoff without it displayed, and we recommend you don’t either.
CHT time history also proves useful by making the trend obvious. This is especially useful in high-
Finally, we love the specific fuel consumption display. Its measure of engine efficiency that confirms when you have leaned properly, and tells you when you need to lean again.
Dual rotary knobs and 5 lighted softkeys make up the pilot interface. All are high tactile force, which is optimal for operation in turbulence. The bezel includes a hand rest that further enhances ease of use when things get rough. Primary knob functions are heading selection and baroset. Pressing any softkey brings up secondary knob functions and softkey labels. Simple, effective and efficient.
When on the ground or in calm air, practically any pilot interface will work. Introduce turbulence and the story changes. To operate an EFIS in such conditions, the pilot must be able to position his fingers on the control (knob or button) without activating it. Activation of the control can then take place with assurance the intended operation will be performed. This is why the HXr does not have a joystick type control. It has high-
Generous Connectivity Options
The HX includes 8 serial ports in and out (one configurable as RS422), dual ARINC 429 in, ARINC 429 out (optional), and dual USB ports. Multiple display units are coupled via Ethernet. Analog interfaces include 8 analog inputs and 8 discrete outputs. We have the interfaces for your needs now and into the future.
Redundancy will not be compromised in panel designed around the HX. The extensive interfacing and processing power of the HX allows dual inputs for attitude/air data, while still accommodating dual GPS and nav/com into every display unit. Automatic cross-
The HX includes full autopilot functionality. Just add GRT servos and you are on your way to a fully automated cockpit. Like all GRT EFIS systems, it can also control an external stand-
Already own an autopilot? Just wire it to the HX, and the system will couple it to all your navigation sources.
PFD Video with Overlay
The HX supports forward looking low-
Engine Data with a Bonus
Engine data is provided to the HX via the Engine Information System (EIS). The EIS is a complete instrument with a display and user-
The GRT Avionics AOA function drives on-
In addition, an audio output is provided on the SX200A, HX, and HXr display units. This audio provides an approaching stall warning annunciation (a pulsating tone that varies with proximity to the stall warning angle) and a solid tone indicating stall is imminent.
Audio Alerting System
Voice alerts are provided for critical engine and flight conditions, as well as altitude call outs. System changes, such as autopilot disconnect and way-
Control Radios and Flight Plans with Your Android Phone or Tablet…
Install an optional Bluetooth dongle and connect with your Android phone or tablet using our GRT REMOTE App for Android. Fully control your connected radios, create & edit active flight plans, and view the flight instruments all on your Android tablet or phone–perfect for the backseat co-
Free Database and Software Updates
Navigation database updates are provided free for all US territory. Software updates are also free. All GRT equipment includes bootloaders, allowing them to be updated via the HX without removing them from the airplane.
We support that!
We have always supported the spirit of experimental aircraft by providing the builder with as many options as possible. This is why we provide free HX software support for the following equipment:
(If there is a device that you do not see on this list and you would like the HX to interface with it, drop us a line! We are always willing to consider new devices, and thanks to the extensive interfacing and powerful processor within the HX, future growth is built-
Chose your screen size
The HX is available in 6.4” and 8.5” screens, with the 8.5” being the most popular. Both feature the sunlight-
Easy Upgrade Path from Older Horizon Systems
The HX shares the same wiring as our Horizon HXr systems, and is 100% compatible with the Horizon HS and WS systems. User settings can be backed up and transferred from legacy equipment into a new HX, making upgrading even easier. Click here for upgrade price list.
Even in this small panel, two HX screens fit nicely. The airplane is on the ground, and in the PFD runways are visible. One of the six engine pages has been set up to show dial type displays of EGT, turbine RPM, and fuel flow. In addition to the ability to monitor turbine and turboprop engines, the precision of the AHRS allows it to provide accurate attitude data in high-
“When I evaluated electronic flight instrumentation systems for my FLS Microjet, GRT was the clear winner. The mix of high-
Precision radar targeting system test pilot
Builder/pilot of Lewis & Clark’s FLS Microjet
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