Linear Drive - Raymarine Autohelm ST7000 Installation Instructions Manual

1.2.2 Linear Drive Units
The Autohelm Linear Drive Units are of
outstanding design which features powerful thrust,
fast hard overtimes and near silent operation.
When backdriven the movement is smooth with
minimal backdrive force. Using a high tensile belt
Supply Voltage
Peak Thrust
Maximum Stroke Speed
Maximum Stroke
Overall length at Mid
Stroke 'A'
Tiller Arm Length 'B'
(+35deg Rudder)
Maximum Rudder Torque
Power Consumption
(typical average)
Suitable for vessels up to
Maximum displacement
Type 1
12 volts
295Kg(650lb)
28mm/sec(1.1
in/sec)
300mm(12in)
700mm(27.5in)
250mm(10in)
735Nm(6500lb in)
1.5 - 3 amps
14m(45ft) LOA
11800Kg(26000lbs)
drive and epicyclic reduction gearbox the powerful
electric motor is controlled by an electronic fail-
safe clutch.
The design is highly efficient and provides high
performance for minimum current consumption.
A tiller arm of adequate strength must be used to
transfer drive from the drive unit to the rudder
shaft. Both Edson and Whitlock Marine provide
suitable standard tillers.
Type 2S
12 volts(24V optional)
480Kg(1050lb)
28mm/sec(1.1 in/sec)
300mm(12in)
700mm(27.5in)
250mm(10in)
1190Nm(10,500lb in)
2.75 - 6 amps
17m(55ft)LOA
20000Kg(44000lbs)
Type 2L
12 volts(24V optional)
480Kg(1050lb)
28mm/sec(1.1 in/sec
400mm(16in)
850mm(33.5in)
350mm(14in)
1660Nm(14,700lb in)
2.75 - 6 amps
18m(60ft)LOA
25000Kg(55000lbs)