Model Testing

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Tests

  • Resistance
  • Seakeeping
  • Roll decay, dynamic stability
  • LCG optimization
  • Wedge/interceptor trim optimization
  • Streamline
  • Open-water maneuvering

Towing Tank

  • Length 60 m
  • Breadth 5 m
  • Water depth 3 m
  • Linear (1st order Stokes wave) and nonlinear (Jonswap, Pierson-Moskowitz, ISSC, TMA spectra) waves
  • Wave height up to 0.35 m
  • Wave length 0.2-20 m
  • Wave frequency up to 2.8 Hz

The unmanned carriage can tow models 1-3 m in length. The maximum weight of the model is 200-250 kg and the highest speed is 5.5 m/s. The vibratory response and the deflection of the carriage at its midspan remain below 1.0 mm during test runs.

References

  • Baltic Workboats 1800 WP  ja 2200 WP patrol vessels
  • Baltic Workboats 4500 WP multifunctional vessel
  • Baltic Marine electric ferry
  • ASV NYMO
  • TalTech Centre for Biorobotics underwater robot

Prices

Model production

3000-5000 €

Model setup

Waterlines and sections markings, centre of gravity and gyration, accelerometers, towing force dynamometer, draft change gauges
150 €/h
(4000-4500 €)

Resistance tests

Measurements of towing force, dynamic trim and draft change; documentation of wave pattern and spray in photos; estimation of the wetted surface and waterline length; analyses and final report
(2 loading conditions, 12 speeds — 5000 €)
150 €/h

Seakeeping tests (head sea tests)

Measurements of added resistance, vertical motions, and accelerations at three points; analysis of wave and spray deflection
(2 loading conditions, 2 irregular wave spectrums, 3 speeds — from 8000 €)

Prices are exclusive of VAT at 20%.
150 €/h

Contact

TARMO SAHK, MSc

Experimental research
Mechanical Engineer – Doctoral student +372 5661 9989 tarmo.sahk@taltech.ee ETIS