Cub Driver wrote:

Unnamed Quoted person:
The
Garmin 1000 gets pitch information by detecting changes in the vertical
component of the Earth's magnetic field and by cross referencing that
with
information from the GPS. It does the same with roll information. It
sounds
complicated, but it really is just a fancy compass.

It sounds like an upgrade of the Garmin 196!

Except that the quoted paragraph is incorrect. While the 1000 does use the
GPS and a magnetometer to stabilize the AHRS and to allow for "flying
reboots", it does use a standard AHRS (solid state gyros) for attitude
reference. From the Garmin documentation:

"Advanced AHRS architecture
For reliable output and referencing of aircraft position, rate, vector and
acceleration data, the G1000 uses Garmin's innovative GRS77 Attitude and
Heading Reference System (AHRS). Able to properly reference itself even
while the aircraft is moving, the Garmin AHRS offers all the standard
elements of traditional strap-down AHRS - at a fraction of the cost. What's
more, it uses additional comparative inputs from GPS, magnetometer and air
data computer information to achieve new levels of integrity, reliability
and precision."

Notice the "additional comparative inputs".

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Marc J. Zeitlin email: |
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