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Trim Tab Operation
Theory of Trim Tab Operation
Trim tabs are used to modify the running angle of the boat. The Chris-Craft is designed to plane at a
particular speed and weight distribution. As weight increases and/or speed decreases, the stern settles
creating an inefficient, untrimmed condition. In this bow-high position, visibility is limited, fuel economy is
poor and wake is large. Additionally the hull bottom may be pounded by waves. Trim tabs allows the
vessel to plane at heavier loads and slower speeds than the designed planing speed.
Increased trim may improve the ride in a head sea by allowing the bow to cleave the waves, rather than
pound over them. In a following sea, the tabs should be fully retracted for maximum steering response.
A listing condition may be corrected by applying more trim on one side. Too much trim will increase the
drag and cause the bow to “dig in” allowing wave action to veer the boat.
As the owner/operator, it is you responsibility to understand how trim tabs affect the characteristics of
the boat. The Trim Tab Owner’s Manual that accompanies this vessel provides additional operating and
safety instructions, which is not repeated here.
However at a minimum:
•
Use trim tabs only at cruising speeds.
•
Do not use more tab than is actually needed for good performance.
•
Do not reduce the running angle less than 2°.
•
Do not use the trim tabs when backing or running an inlet. Damage to the cylinders and tabs may
result.
•
Fully retract the trim tabs when trailering the boat or if leaving the boat to sit in the water for any
extended length of time.
•
Spend time getting familiar with how the trim tabs affect the vessel.
Trim Tab Electrical System
The trim tab electrical system is comprised of the following components:
•
Control switch at the helm
•
Electric Cylinders
•
Control Box
Trim Tab Control Switches
There is a trim tab switch for each trim tab and are generally located on or near the helm. When
pressed, the switch activates the pressure pump that moves the trim tab in the desired direction. Actual
location of the switches may vary from model to model. To correct for a listing condition you must lower
the trim tab on the listed (lower) side by pushing the top half of the rocker switch in a half second burst
until the boat is righted. If the stern of the boat is highly loaded, use both switches to operate both tabs,
which lowers the bow when the boat is on plane.
Improper use of the trim tabs can
cause death, an accident or injury.
CAUTION
WARNING
3-32
3-32
Systems
Summary of Contents for 2014 32 Corsair RK
Page 2: ...P 1 P 1 Preface ...
Page 21: ...Figure 1 1 Figure 1 2 General Specifications Continued 1 5 1 5 Introduction ...
Page 114: ...Systems Fireboy Installation Continued 3 52 3 52 Table 3 2 Fireboy Trouble Shooting Guide ...
Page 125: ...3 63 3 63 Figure 3 128 AC Wiring Diagram Air Conditioner Schematic Systems ...
Page 131: ...Figure 3 141 AMP Settings and Wiring Rockford Fosgate Stereo System Systems 3 69 3 69 ...
Page 169: ...B 2 B 2 Appendix B ...
Page 170: ...Appendix B B 3 B 3 ...
Page 171: ...Appendix B B 4 B 4 ...
Page 172: ...Appendix B B 5 B 5 ...
Page 173: ...B 6 B 6 Appendix B ...
Page 174: ...Appendix B B 7 B 7 ...
Page 175: ...B 8 B 8 Appendix B ...
Page 178: ...C 3 C 3 Appendix C ...
Page 182: ...Appendix E E 2 E 2 ...
Page 183: ...Appendix E E 3 E 3 ...
Page 185: ...Figure F 1 Navigational Aids Chart Appendix F F 2 F 2 Figure F 1 Navigational Aids F 2 F 2 ...
Page 186: ...Figure F 2 Lateral Aids F 3 F 3 Appendix F ...
Page 192: ...Figure G 5 Electrical Steering Volvo Installation Appendix G G 6 G 6 ...
Page 194: ...G 8 Appendix G G 8 Figure G 6 Volvo Electronic Vessel Control ...
Page 195: ...G 9 G 9 Figure G 7 Volvo Electronic Vessel Control Continued Appendix G ...
Page 196: ...Appendix G Figure G 8 Volvo Electronic Vessel Control Continued G 10 G 10 ntrol ...
Page 197: ...G 11 Appendix G G 11 Figure G 9 Volvo Electronic Vessel Control Continued ...
Page 198: ...G 12 G 12 Figure G 10 Volvo Electronic Vessel Control Continued Appendix G ...
Page 201: ...G 15 G 15 Appendix G Figure G 13 Installing Mercury Propellers ...
Page 202: ...Figure G 14 Bravo One Propeller Installations G 16 G 16 Appendix G ...
Page 203: ...G 17 G 17 Figure G 15 Bravo Two Propeller Installation Appendix G ...
Page 204: ...Figure G 16 Bravo Three Propeller Installation G 18 G 18 Appendix G ...
Page 205: ...Appendix G Figure G 17 ProNautic Battery Charger G 19 G 19 12 VOLT MODELS ...
Page 206: ...Figure G 18 AC Electrical Panel Page One US Appendix G G 20 G 20 ...
Page 208: ...Figure G 20 AC Electrical Panel Page One Euro Appendix G G 22 G 22 ...
Page 213: ...Figure G 27 RK Cabin Light Switch Wiring Appendix G G 27 G 27 ...
Page 214: ...Appendix G G 28 G 28 Figure G 28 RK Head Switch Wiring ...
Page 218: ...G 32 G 32 Figure G 36 Rockford Fosgate Stereo Connector Appendix G ...
Page 226: ...Glossary Of Boating Terminology Appendix H Appendix H H 1 H 1 ...
Page 227: ...H 2 H 2 ...
Page 228: ...H 3 H 3 ...
Page 229: ...H 4 H 4 ...
Page 230: ...H 5 H 5 ...
Page 231: ...H 6 H 6 ...
Page 232: ...H 7 H 7 ...
Page 233: ...H 8 H 8 ...
Page 234: ...H 9 H 9 ...