The Towing Tanks
Towing Tanks I and III:
Dynamometers for ship model testing
- All dynamometers compatible with computerized data collection and reduction.
- Strain gauge based dynamometers for:
- Towing force
- Open water tests
- Propulsion tests
- Test equipment for fixed and floating structures measuring:
- Pressure
- Forces and moments in six degrees of freedom
- Displacement in six degrees of freedom
- Modular force gauges give flexibility for special instrumentation requirements.
- 3 dimensional wake measurements by use of 5-holes pitot tubes.
- Strain gauges and inductive propeller nozzle dynamometers.
- 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 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.
