Bertram 540 - Handle Block

540
CONTROL STATION
Studio ti 03312 540-04usa
100
6
6.3 HANDLE BLOCK
The heads block is a system designed to control through electric signal
the revolutions of the engines and the gearbox speeds. The system may
consist of a single block carrying the heads and the selector switches or
of two separate heads, each one installed at the side of the drive wheel,
and of a separate panel.
In both cases the heads can be moved to three detents:
1. Neutral: in this position, the gearbox is disengaged and the
propulsion engines turn at idle speed (visual signal “N” lit);
2. Ahead/astern: in this position the gearbox is engaged to “ahead” or
“astern” gear and the engines turn at idle speed (visual lights “F” or
“R” lit);
3. Maximum revs: indicates the maximum speed detent for ahead and
astern gear.
The system between the positions (2) and (3) changes the engine
revolutions continuously.
The operation principle is different for the two modes: standard and
trolling.
S
CAUTION
In “trolling” mode (optional) the function of the heads block changes with
respect to the standard mode.
B00255
Standard mode diagram
infinitely variable speed
adjustment
full speed (full
speed astern)
ahead detent
full speed (full
speed ahead)
neutral detent
astern detent
infinitely variable speed
adjustment
backward
thrust range
thrust range
forward
B00255
Trolling mode diagram (optional)
infinitely variable slip
adjustment and speed
increase regulation
Clutch: 0% slip (grip) and max.
speed when trolling
gear box: clutch backward 100%
slip (lock)
neutral detent
infinitely variable slip
adjustment and speed
increase regulation
backward
thrust range
thrust range
forward
Clutch: 0% slip (grip) and max.
speed when trolling
gear box: clutch backward
100% slip (lock)