Grid Bars In The Tunnel Openings - Vetus RimDrive RD125 Instructions D'installation

Instead of a scallop and 'eyebrow' bump fair-
ing can be placed just in front of the tunnel
opening.
If the connection of the thrust tunnel and the
ship's hull is to be made with a sloped side, it
should be executed in accordance with the
drawing.
Make the sloped side (C) with a length of
0.1 to 0.15 x D and make sure that the angle
between the tunnel and the sloped side will
be identical to the angle between the sloped
side and the ship's hull.
6

Grid bars in the tunnel openings

Although the thrust force will be adversely af-
fected, grid bars may be placed into the tun-
nel openings, for protection of the thruster.
The bars must have a rectangular cross-sec-
tion.
Do not fit round bars.
Do not fit more bars per opening than is indi-
cated in the drawing.
The bars must overlap a certain amount.
The bars must be installed so that they stand
perpendicular to the expected wave form.
vetus® Installation instructions thruster RIM DRIVE 250 mm
β
γ
C
γ
Sharp
Thruster
'RD . . . . .'
RD125 RD160
In order to limit the negative effect of this
on the thrust and on hull resistance during
normal operation as much as possible, the
following must be taken into account:
4 x 4 x
250 mm (10")
C
β
C = 0.1 x D ... 0.15 x D
D
[mm] (inches)
13 / ")
250 (9
16
ca. 0.7 x 0.7 mm
( 1 / " x 1 / ")
32 32
min. 20 mm ( 3 / ")
4
1
max. 40 mm (1 / ")
2
3 mm ( 1 / ")
8
=
α
ENGLISH
β = β
γ = γ
C
[mm] (inches)
25 ... 38 (1 ... 1 1 / ")
2
ø ...
Overlapping
α : min.
0º
max. 15º
25
020574.03