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
3
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)