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description/installation
h1000 pilot
Page 8
rudder reference unit
Measure the voltage difference between the green and blue wires of the rru; there should be a
minimum of 1V d.c. change from hardover to hardover.
Note: If there is less than a 1V d.c. change the pilot will not commission
.
x
After installation check full movement of the steering system ensuring that there is no fouling
between the steering gear, rru parts and drive unit.
x
Ensure that there is no backlash in the linkage between the rru and the steering gear, otherwise
incorrect operation of the autopilot will occur.
The example shown overleaf is a plan view of a typical system with a tiller arm and quadrant. When
viewed in elevation, the ram drive arm and rudder reference unit drag-link must not be more than ±9
q
from horizontal. Ideally, all components should be horizontally aligned as this prevents excessive
stress during operation.