Copyright © 2015  Grand Rapids Technologies, Inc.

Electronic Flight Instrumentation for Experimental Aircraft Since 1991

Sun ‘n Fun 2015 Specials

Mini-EFIS – All versions

Free OAT-03 Outside Air Temperature Probe

Free ground shipping to any US address


Sport SX200A

50% off Vertical Autopilot Option

25% off Angle-of-Attack Option

Free ground shipping to any US address


HX/HXr

Free Remote GSNS ( Satellite Navigation using GPS, GLONASS, and other satellite navigation constellations)  or $175 off remote RAIM GPS receiver

25% off Angle-of-Attack Option

Single HXr and AHRS - Add two M760 Com Radios and a PAC15EX audio panel for $1,750

Dual HXr and AHRS - Add two M760 Com Radios and a PAC15EX audio panel for $1,250

Free ground shipping to any US address


Dual HXr Package Special

HX/HXr Single Screen Special

Add two M760 Com Radios and a PAC15EX audio Panel for $1250.

Free ground shipping to any US address


NEW! Mini-GA Now Shipping


GRT Avionics EFIS now available as a portable electronic device for certified and experimental aircraft. Click here to read more about it.


Angle-of-Attack (AOA) Sensing/Stall Warning -- $249


Angle-of-attack sensing is now available for all current models of the GRT EFIS and as an upgrade to all versions of the Mini-EFIS,  SX200A EFIS (identifiable by their digital magnetometer), and Adaptive AHRS.  Sensing is via a two-port 45 degree pitot tube, such as those commonly available from a variety of manufacturers, or using a probe fashioned by the builder.  This method has no moving parts, and allows the use of heated pitot tubes that preserve the stall warning function even in the presence of icing.


The GRT Avionics AOA function drives on-screen AOA symbology that shows too fast/too slow/optimal approach speeds, as well as stall warning. 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 – Free!


Audio alerting is now standard on all models of the HX/HXr and Sport SX models, and is a free software upgrade to existing customers.  Audio alerts are provided for warning conditions, such as stall, overspeed,  engine conditions, etc,  and advisory messages such as way-point sequencing, altitude call-outs, etc.  The audio alerting includes factory default messages or may be user-customized.