Raymarine Autohelm 100, Install Manual

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Chapter 1: System Components
15
Linear Drive
The Autohelm linear drive unit is of outstanding design which features
powerful thrust, fast hard overtimes and near silent operation. When
backdriven the movement is smooth with minimal backdriven force. Using
a high tensile belt 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.
90°
D1010-1
A
4 off fixing holes suitable
for 10mm (0.4in) bolts
79mm (3.1in)
114mm (4.5in)
197mm (7.8in)
50mm (2in)
Drive Dimension 'A'
Type 1 700mm (27.5in)
Type 2 (short) 700mm (27.5in)
Type 2 (long) 850mm (33.5in)
Hydraulic Linear
The hydraulic linear drive unit is a self contained secondary steering
cylinder (with a built-in solenoid bypass valve). The unit is driven by a
reversing hydraulic pump to provide a totally isolated autopilot steering
system.
D877-1
101.6mm (4in)
152mm (6in)
80mm
(3.15in)
457mm (18in)
A
Drive Dimension 'A'
Type 2 540mm (21.25in)
Type 3 690mm (27.15in)