HYDRAULIC CYLINDERS FOR INBOARD ENGINES
-
page 9
of 23
Installation and Maintenance Manual
B
B
A
C
1.5 Cylinder choice
This paragraph shows some examples of application for the correct choice of the cylinder and of its arm
(
A
). The table below shows the arms for each cylinder with four different sizes (two in inches and two in
millimetres) to approach as much as possible the desired configuration. The necessary torque can be
defined according to the steering half angle (
B
). The data given are only exemplifying and so they are not
binding.
The maximum torque is not the normally used torque but it is the maximum torque allowed calculated with a maximum
thrust, shown in the table on the next page, applied to the corresponding helm arm.
WARNING
Make sure that the cylinder and not the helm reaches the end of stroke.
DANGER
A
B
C
Helm arm
Steering half
angle
Installation height
at the end of
stroke
150 mm
30°
130 mm [5.12"]
420 Nm
210 Nm
6"
30°
133 mm [5.22"]
429 Nm
215 Nm
130 mm
35°
106 mm [4.18"]
343 Nm
172 Nm
5"
36°
102 mm [4.03"]
331 Nm
166 Nm
180 mm
30°
156 mm [6.14"]
1068 Nm
356 Nm
7"
30°
154 mm [6.06"]
1053 Nm
351 Nm
150 mm
36°
121 mm [4.76"]
825 Nm
275 Nm
6"
36°
124 mm [4.87"]
844 Nm
282 Nm
180 mm
30°
156 mm [6.14"]
1546 Nm
516 Nm
7"
30°
154 mm [6.06"]
1524 Nm
508 Nm
150 mm
36°
121 mm [4.76"]
1194 Nm
398 Nm
6"
36°
124 mm [4.87"]
1221 Nm
407 Nm
230 mm
30°
200 mm [7.87"]
1977 Nm
659 Nm
9"
30°
198 mm [7.80"]
1962 Nm
654 Nm
200 mm
35°
164 mm [6.46"]
1626 Nm
542 Nm
8"
34°
168 mm [6.61"]
1665 Nm
555 Nm
180 mm
30°
156 mm [6.14"]
2709 Nm
903 Nm
7"
30°
154 mm [6.06"]
2668 Nm
890 Nm
150 mm
36°
121 mm [4.76"]
2089 Nm
697 Nm
6"
36°
123 mm [4.84"]
2136 Nm
712 Nm
Maximum torque*
Maximum torque
normally used to
choose the
cylinder**
** The maxium torque usually used is the maximum torque that is not generally exceeded at cruising speed.
UC 293-I
* concerning the maximum helm ngle position allowable and with reference to the arm chosen.
UC 69-I
UC 116-I
UC 168-I
UC 215-I
