Mini-X Installation, Setup & User Manual GRT Avionics
Revision A9 8
Section 1: Introduction
1.1 About the Mini-X
We designed the Mini with two main goals in mind: A small, lightweight, economical VFR EFIS
system for LSA and light kitplanes, and an affordable, high-quality backup to larger EFIS systems
for IFR operations. The Mini utilizes the same pilot interface as the popular Horizon and Sport
series; If you already use GRT avionics for your primary flight display, you will not have to remember
a different brand’s “buttonology” in an IFR emergency. The Mini has a built-in GPS for navigation,
so you will always know where you are.
In addition to the basic backup flight instruments, all models of the Mini can also serve as a serial
altitude encoder for any modern transponder, and serve as a control head for a remote Trig TT22
transponder. To top it off, the brilliant 1200-nit, high-resolution display shared by all three Mini
models ensures great visibility in all lighting conditions.
1.2 Tools & References for Installation
In addition to basic mechanical hand tools, a D-sub pin crimper is required in most installations.
A basic 4-way indent crimper is available from SteinAir for less than $35. We supply a few loose
male and female pins with your wiring harness, and we have them available for sale if you need
more.
If you are new to electrical systems and wiring, we highly recommend reading
by Bob Nuckolls. This book has been around for almost 30 years and covers everything
a homebuilder needs to know about how electrical systems work, how to design them, and how
to build them. There are also numerous online video tutorials by EAA, SteinAir and others in the
experimental aircraft community on wiring technique and electrical system design.
1.3 Mini System Requirements
The Mini utilizes the following systems for operation:
�Aircraft Power (12- or 28-volt system) - 0.25 Amp current draw at full brightness
�Pitot/static connection for flight instrumentation
�Built-in GPS with a remote “puck” antenna which must be within view of the sky at all times.
�Optional remote magnetometer is required for magnetic heading information and AHRS
independent of GPS track– see Section 1.4 for more information.
