Towing tank services

• Resistance test
• Seakeeping test
• Roll decay test, dynamic stability test
• LCG optimization tests
• Wedge/interceptor trim optimization test
• Streamline test

Towing tank characteristics

• Total length of the basin 60 m
• Measurement distance 46 m
• Breadth 5 m
• Water depth 3 m
• Distance between the carriage and the water surface 0.75 m

Wave generator

6 FLAP

• linear (1st order Stokes wave) and nonlinear (Jonswap, Pierson-Moskowitz, ISSC, TMA spectra) waves
• wave heights range of 0-0.35 m
• wave lengths range of 0.2-20 m
• wave frequencies range up to 2.8 Hz

Carriage

UNMANNED

• The carriage structure enables variable connections between the model and the carriage
• Possibility to connect one model of up to 3 m with towing point
• The towing point is adjustable height- and lengthwise
• The maximum weight of a model is up to 200-250 kg
• The vibratory response and the deflection of the carriage at its midspan is below 1.0 mm during the test run.
• The maximum speed of a model is 5.5 m/s
• The minimum acceleration and deceleration distance is 6 m.
• Model speed accuracy at the required speed level is 0.01 m/s.
• The accuracy tolerance of the carriage trajectory is 0.1 mm/m in relation to water surface.
• Carriages absolute position with respect to the basin is determinable at accuracy level of 20
  mm at any given moment.
• Carriage speed with respect to the basin is determinable and recordable at accuracy level of
  0.01 m/s.
• Carriage speed is controllable and adjustable within 0.01m/s.
• The acceleration and retardation are adjustable within steps of up to 0.01m/s

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Model workshop

• Model workshop: 5-axis milling machine 3×2,5x1m
• Model design: NX, SolidWorks, Rhino etc
• SCC model requirements
  

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References

• 22m Wave Piercing Patrol Boat

(Picture of patrol boat in real size)

• 45m Multi-functional patrol vessel
  

(3D picture)

• 18m Wave Piercing Patrol Boat

(3D picture)

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Ongoing tests

• 18m Wave Piercing Patrol Boat

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Price list of services

MODEL TESTS	Producing a model	3 000 – 5 000 €
	Model setup  (4 000-4 500) Marking the water lines and sections; determination of centre of gravity and gyration; equipping the model with accelerometers, towing force dynamometer and draft change gauges.	150 €/h
	Resistance tests (at 2 loading conditions 12 speeds about 5000 €) Measurements of towing force, dynamic trim and draft change; documentation of wave pattern and spray by photos; estimation of the wetted surface and waterline length; analyses and report.	150 €/h
	Seakeeping capabilities tests(Head sea tests)(at 2 loading conditions 2 irregular wave spectrums and 3 speeds from 8000 €) Measurements of added resistance, vertical motions, and accelerations at three points. Analyse of wave and spray deflection.	150  €/h

 

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