7
3006
2
2019
-
Stern Installation
MC_0142
HYD Stern Thruster Measurements
EN
Measurement
code
Measurement description
mm inch mm inch mm inch mm inch mm inch mm inch mm inch
A
Length inside hull
172
6.77
172
6.77
91
3.58
195
7.68
305
12.01
257
10.12
257
10.12
B
Length of external tunnel
256
10.08
300
11.81
340
13.39
420
16.54
422
16.61
540
21.26
540
21.26
C
Minimum depth center of tunnel to waterline
150
5.91
215
8.46
250
9.84
300
11.81
300
11.81
380
14.96
380
14.96
D
Maximum allowed Hull thickness
35
1.38
54
2.13
60
2.36
60
2.36
60
2.36
54
2.13
54
2.13
*
Tunnel Length
337
13.27
330
12.99
350
13.78
456
17.95
456
17.95
550
21.65
550
21.65
Measurement
code
Measurement description
mm inch mm inch mm inch
A
Length inside hull
400
15.75
405
7.28
470
18.50
B
Length of external tunnel
535
21.06
705
0.24
820
32.28
C
Minimum depth center of tunnel to waterline
620
24.41
770
30.31
915
36.02
D
Maximum allowed Hull thickness
140
5.51
120
4.72
145
5.71
*
Tunnel Length
700
27.56
850
33.46
860
33.86
* 100
* 700
* 160
* 1000
* 240
* 1400
* 320
* 400
* 420
* 550
MG_0160
Waterline
max
A
B
D
max
C
MC_0036
Positioning the stern truster
EN
Install the thruster as deep as possible on the vessel’s transom (Fig. 1).
The tunnel should be installed as deep under the waterline as possible for two reasons:
1. So that it does not suck air down from the surface which will reduce performance and increase noise levels.
2. To get as much water pressure as possible to receive maximum effi ciency from the thruster.
Generally, the top of the tunnel should be a minimum of 1/2 x the tunnel diameter below the waterline. For best performance, the distance should be 1/1
x tunnel diameter below the waterline.
Stern thruster installation for shallow vessels (Fig. 2).
When installing in shallow hull vessels, add stern cowls to the installation process.
See next page
MG_0018
1/
1
Ø
1/
1
Ø
standard stern thruster tunnel installation
Stern thruster and cowl installation for shallow vessels
