Page 14 - ULTRAFLEX Katalog 2021
P. 14

SUGGESTIONS          Selection of the appropriate mechanical steering system is an important factor for the
            AND                  safety and functionality of your boat.
                                 The combination of engine power, hull type and boat speed influence the correct
            WARNINGS             selection of the steering system.
            WHEN                 The load on the steering system increases with the boat speed and engine power; the
            SELECTING A          torque generated by the propeller rotation in high power outboard applications can make
                                 it hard to steer.
            MECHANICAL
            STEERING             Big boats with displacement hulls and inboard or non power assisted stern drive engines,
            SYSTEM               can generate high rudder loads: in these cases a mechanical steering system will be
                                 inadequate and we suggest the use of an Ultraflex hydraulic steering system.
    12                           We always recommend consulting qualified personnel when selecting, installing and


                                 maintaining a steering system for your boat.


            ADVANTAGES
            OF A                                                                        1
            PLANETARY
            GEAR DESIGN




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                                                                                           2






                                   Ultraflex mechanical steering helms T71FC, T73NRFC, T91, T93ZT as well as dual
                                   cable versions and tilt wheel versions use a Planetary Gear Design. A Planetary Gear
                                   Design has three satellite gears that rotate on their axis and at the same time rotate
                                   around the central helm axis. This allows for equal distribution of engine torque over
        MECHANICAL STEERING SYSTEMS
                                   three points of the central gear, dividing and balancing the system loads. The benefits
                                   of this special design are increased system longevity, increased efficiency and less
                                   engine feedback compared to single pinion gear helms.






            EFFICIENCY
            COMPARISON
            TESTS

            Test configuration:
            3 bends at 90°; 1000N   Efficiency
            load


            NOTE: indicated figures
            have been obtained
            after 500 cycles of
            running from samples                 Tension             Compression               Average
            bought from after-        T71FC  Planetary gear design steering with M66 (Ultraflex)  Direct transmission steering of well known competitor brand (D)
            market sources
                                      T85 Direct transmission steering with M66 (Ultraflex)
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