Raymarine Autohelm 100, Install Manual

Page: 54 / 109

Chapter 2: Installation 53
Type 2 Drive Unit (24V)
Cable Length (Drive Unit
to Course Computer)
Cable Gauge Copper Area
Up to 3m (10ft) 12 AWG 2.5 mm
Up to 5m (16ft) 10 AWG 4 mm
Up to 7m (23ft) 8 AWG 6 mm
Up to 10m (32ft) 6 AWG 10 mm
Up to 16m (52ft) 4 AWG 16 mm
81004-05
Linear Drive Unit
The linear drive unit connects directly on to the rudder stock at the tiller
arm radius (shown below).
Drive Unit Tiller Radius (B)
Type 1 250mm (10in)
Type 2S 250mm (10in)
Type 2L 360mm (14in)
81004-09
It is preferable to couple the linear drive unit to the rudder stock via an
independent tiller arm (Edson and Whitlock offer a standard fitting). In
certain cases, however, it may be possible to couple the pushrod to the
same tiller arm, or rudder quadrant employed, by the main steering
linkage.
Mid Stroke
'B'
90°
D760-1
Caution: The linear drive system can exert a thrust of over 1000Ib.
(450Kg). The steering gear manufacturer must be consulted if any doubt
exists about the strength of the existing tiller arm or rudder quadrant.