The idea for tunnel thrusters came up in the 70´s and wasnt worked over since…concept is outdated ! EXTURN has been invented by an experienced group of.

The idea for tunnel thrusters came up in the 70´s and wasn’t worked over since…concept is outdated !

EXTURN has been invented by an experienced group of sailors and designed by highly qualified engineers in 2003/2004. After extensive tests of the entire system and all components in a sophisticated test channel and on test boats, EXTURN has been released for sale in 2007.Marinno is the only thruster company with in-house testing environment.

Constructional Benefits: sealed unit, fully protected drive components great installation/operation convenience no explosion risk maintenance-free

Benchmarking results

Benchmarking results

Best performance – ideal leverage, no cavitations

Lowest electricity consumption – approx. 50%

Shortest and easiest installation – no hull destruction

No waiting and drying time – mountable during season

Least interior space requirements

Longest run-time – motor cooled by seawater

Min. 80 % less noise emission

Competitive system costs – lowest installation/running costs

Completely maintenance-free – no anode and spare part changes

EXTURN

tunnel

pivot point

Performance Benefits

Most forward to the bow, better leverage

Short transverse channel

Deeper under the water line

No ventilation of the propeller

Minimum 40 % more efficiency as comparable tunnel-systems

Considerable shorter reaction time

EXTURN

tunnel

pivot point

Hydrodynamic Design

The hydrodynamic shape of EXTURN results in minimal drag, it is comparable with a folding propeller! Experienced regatta sailors couldn’t measure speed loss using GPS. Mathematically EXTURN results in a maximum speed loss of 0.2 knots at 10 knots cruising speed.

EXTURN creates less drag then tunnel thrusters – Why?The flow speed at the tunnel´s position isMinimum twice as fast as at the bottom ofthe hull with EXTURN (see cross sectionof hull). This results in at least the fourfoldretention force for a tunnel thruster whichslows down the boat significantly.

System components

Relays

E-BOX

Batteries EXTURN

Joystick

Joystick

Remote control & Receiver

Installation Scheme 12 V

The Innovation with quality

Components from and assembling in Germany,Switzerland and Austria.

Endurance approved formore then 200 hours……20 years – lifetime.

Maintenance-free !

EXTURN housingExtreme robust, special coatedAluminium housing.Seawater-resistant and redox-free.

3-Blade-Vector-Propellerpurpose-designed by Marinnoto ensure highest efficiency.

AdapterMade of hard rubber, optimizing the flow characteristics and ensuring tightand simple mounting.

Electric motorMarinno-designed and specialbuilt motors guarantee out-standing performance. Up to 5 minutes nonstop operating time.

Hollow shaft with cable routingmade of steel with neopren and rubberfittings to seal connection and performas suspension.

E-BOX

EXTURN is only system which comes with an E-BOX at no extra charge :

Operation of up to 3 controls

Easy Plug & Play connections

Automatic command among different controls

Automatic shut down of the controls in case of inactivity (10 min.)

Temperature monitoring of motor (flashing LED on control panel)

Gear protection – delay of redirecting (left / right)

Compatible to non-EXTURN control panels

Relays

Even with the relays EXTURN relies on quality :

Waterproof capsuled special relays (IP 65)

Maximum function warranty (200 A continuous current)

No malfunctioning – installation in any position possible

Design prevents sticking of contacts even at continous use

Extreme high durability

Electricity Consumption & Supply

Lower power consumption (- 50 %) at higher performance

Longer operating time with less battery capacity

Minimum self-discharging even after long breaks

DC/DC-Converter for simple charging of 24-V-batterybanks

Unique battery protection system prevents discharging of batteries

Compact battery dimensions – easy transportation

24-V-Batterybank

Controls

Joystick with safety button

On/Off switch to prevent unintentional operation

Overheating indication by flashing LED

No viscous shifter mechanism

Child-proof lock

Safety class IP 67

Controls

Remote Control & Receiver

On/Off switch to prevent unintentional operation

Waterproof and Floatable

Within a short time connectable (Plug & Play)

Integrated bracket

No interaction with other RC equipment

Automatic switch off for battery protection (after 90 sec.)

Maintenance & Operation

EXTURN tunnel-system

Propeller after breakage Propeller after breakage

Circuit breaker after overload Circuit breaker after overload

Anodes

Carbon brushes (motor)

Various gaskets

Installations on Sailing Boats

EXTURN as bow thruster for sailing boats

EXTURN as stern thruster for sailing boats

With regard to the hull shape and materials, there are no restrictions with EXTURN!

Installations on Power Boats

EXTURN „integral“ as bow thruster for power boats

EXTURN „vertical“ as stern thruster for power boats

EXTURN „extension“ and „hut“ as stern thruster for power boats

With regard to the hull shape and materials, there are no restrictions with EXTURN!

Product information - SIMPLEX

Length: 550 mm

Weight: 19,5 kg

Lateral cut: 165 mm

Product information - DUPLEX

Length: 980 mm

Weight: 35 kg

Lateral cut: 165 mm

Product information - COMPACT

Length: 440 mm

Weight: 12 kg

Lateral cut: 165 mm