SAILTEC's Max Power Katalog 2016 - page 6

4
As far forward as possible
Ideal immersion depth
=
1 x Tunnel diameter
Necessary
immersion depth
Water line
Level effects increased
As far forward as possible
Ideal immersion depth
=
1 x Tunnel diameter
Necessary
immersion depth
Water line
Level effects increased
Tunnel thrusters
Retractable thrusters
Select the right thruster
Positioning thrusters is often as important as
choosing the right thrust output when seeking a
suitable thruster for your yacht.
The thruster’s turbine needs to be placed one full
propeller diameter under the water line to achieve
optimal thrust. The thruster must also be positioned
as far forward in the bow or as far back in the
Retractable thrusters are easily installed far
forward in the bow whilst still achieving the required
immersion depths. This results in a thruster that
has a good turning effect on the yacht, often
allowing a unit with a lower thrust rating than its
tunnel equivalent to be used with excellent results.
stern as possible. A thruster stepped back from the
bow (or stern) would need to be more powerful than
one mounted further forward (or aft), to achieve the
same turning effect on the yacht.
With this in mind, tunnel thrusters offer an ideal so-
lution for motor yachts and even deep-footed sailing
yachts when sailing performance is not paramount.
When retracted these units have no effect on the
yacht’s drag and do not reduce sailing performance
in light winds.
Most modern sailing yachts are better suited to
retractable thrusters.
1,2,3,4,5 7,8,9,10,11,12,13,14,15,16,...44
Powered by FlippingBook