Crevalle Boats 33 CSF, Руководство пользователя

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Helm Control Systems
4.8 Trim Tabs
The trim tabs are mounted to the hull below the
swim platform and integrated transom engine
mounting system. A dual rocker switch is used to
control the trim tabs. The switch controls bow up
and down movements. It also controls starboard
and port up and down movements. Bow up and
bow down will control the hull planing attitude,
while port and starboard up and down provides
control for the hull listing.
An LED indicator built into the switch displays the
position of the trim tabs. When one LED is flash -
ing at the top of the display, the tabs are in the
“full-up” (bow up) position. When all LED lights
are lit from the top to the bottom of the display,
the tabs are fully extended (bow down).
The trim tabs are programmed to automatically
retract after a one minute delay when the engines
are shutdown to keep the actuators clean and set
the tabs in the full “UP” position when leaving the
dock. Refer to the trim tab operating manual for
more information on the operation and program-
ming of the trim tabs.
Before leaving the dock or lifting the boat with
a forklift, make sure that the tabs are in the full
“UP” position. If they are not, press and hold the
control in the bow up position for ten (10) seconds
to fully retract the tabs.
Always establish the intended heading and cruise
speed before attempting to adjust the hull attitude
with the trim tabs. After stabilizing speed and
direction, move the trim tabs to achieve a level
side to side running attitude being careful not to
over trim.
After depressing a trim tab switch, always wait a
few seconds for the change in the trim plane to
take effect. Avoid depressing the switch while
awaiting the trim plane reaction. By the time the
effect is noticeable the trim tab plane will have
moved too far and thus the boat will be in an
overcompensated position.
When running at a speed that will result in the
boat falling off plane, lowering the tabs slightly,
bow down, will improve the running angle and
operating efficiency. Too much bow down tabs can
reduce operating efficiency and cause substantial
steering and handling difficulties.
Trim Tab Plane & Actuator
Lenco Trim Tab Control Switch
Be extremely careful when operating in a following
sea. The effect of trim tabs is amplified under such
conditions. Steering and handling difficulties can
result from improper trim tab usage, particularly
in a following sea. Always raise the tabs to the
full bow up position in these conditions.