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https://cris.vtt.fi/en/projects/ultra-high-efficiency-ship-propulsors/ Ultra-High Efficiency Ship Propulsors - VTT's Research Information Portal research information portal high efficiency ultra ship propulsors https://researchwith.stevens.edu/en/publications/effects-of-flexible-propulsors-on-hydrodynamic-forces/ Effects of Flexible Propulsors on Hydrodynamic Forces - Stevens Institute of Technology stevens institute effects flexible propulsors forces