The Towing Tanks

Towing tanks shematic

Towing Tanks I and III:

Dynamometers for ship model testing

  1. All dynamometers compatible with computerized data collection and reduction.
  2. Strain gauge based dynamometers for:
    • Towing force
    • Open water tests
    • Propulsion tests
  3. Test equipment for fixed and floating structures measuring:
    • Pressure
    • Forces and moments in six degrees of freedom
    • Displacement in six degrees of freedom
  4. Modular force gauges give flexibility for special instrumentation requirements.
  5. 3 dimensional wake measurements by use of 5-holes pitot tubes.
  6. Strain gauges and inductive propeller nozzle dynamometers.
  7. Selspot opto-electronic system for motion measurements in six degrees of freedom.

Towing tank II

The small towing tank is primarily intended for student use. It is equipped with a wave maker and a towing carriage. [ More about the student tank ]

Tank data

 

Tank I

Tank II

Tank III

Tank I + III*

Length:

175 metres

25 metres

85 metres

260 metres

Width:

10.5 metres

2.8 metres

10.5 metres

10.5 metres

Depth:

5.6 metres

1.0 metres

10 metres

5.6/10.0 metres

Total weight carriage:

20 tons

0.2 ton

4 tons

20/4 tons

Carriage type:

Tubular member truss

Open bay

Closed beam

Tubular member truss

Wheelbase:

11.04 metres

3 metres

11.04 metres

11.04 metres

Speed range:

0.02-8 m/sec.

0.05-1.75 m/sec.

0-0.5 m/sec.

0.02-12 m/sec.

Maximum acceleration:

1 m/sec2

1 m/sec2

1 m/sec2

1 m/sec2

Driving motors:

4 DC shunt motors in series

1 DC shunt motorwith gear and remotely controlled variator. Wire traction.

2 DC shunt motors

4 DC shunt motors

Power system:

Thyristor controlled

Thyristor controlled

Thyristor controlled

Thyristor controlled

Model size range:

8 metres

1 metre

-

8 metres

Wavemaker:

.

Plunger type Regular and irregular waves

Double flap Regular and irregular waves

Double flapRegular andirregular waves

Maximum wave height:

.

0.3 metre

0.9 metre

0.9 metre

Wave period range:

.

0.25-3 sec.

0.8-5 sec.

0.8-5 sec.

Maximum wave steepness:

.

1:8

1:10

1:10

Wave spectra:

Computer generated, based on 4000 sine components

* Tank I and III can be used simultaneously and also as one long tank (Tank I + III) by removing the gate (12) and wave absorber (15). In tank I + III either of the two carriages can be used.