LamaLo Technology Inc.

Powering & Torque Requirements

On British Columbia Ferries

British Columbia Ferry Services operate over 35 vessels at 47 ports of call along the coast of British Columbia, Canada. These vessels have unique operational profiles that are very demanding on the propulsion machinery. Up to 30 dockings a day are conducted, in confined waters with significant wind and tides. Each route/vessel has a specific propulsion powering and shaft torque requirement. To assist in defining the ship specific power and torque requirements for upgrades to the propulsion machinery, propulsion shaft torque (mean and dynamic) measurements were conducted. Measurements were taken throughout the operational profile, including transit, docking, accelerations, turning, crash stop, and speed power tests. Ship specific power and torque requirements were determined and provided to the owner as specifications for the new engines. Using the results of the measurement report the main engines and propellers were replaced on the MV Klitsa in 2002 (View Paper – pdf file). The vessel service speed increased which enabled it to maintain its schedule for the first time, and the fuel consumption dropped by about 10%. Results of MV Klitsa work were presented at the October 2003 meeting of the Canadian Institute of Marine Engineers, Vancouver, British Columbia, Canada.

MV Klitsa MV Kahloke

MV Quinsam Original 3 Bladed Propeller

MV Howe Sound Queen MV North Island Princess

MV Quadra Queen II MV Queen of Coquitlam

Example of Shaft Power vs Engine Speed

Note: Propeller-Engine Not Matched at Rated Speed of 1800 RPM

Unfiltered

10 Hz Low Pass Digital Filter

Example of Shaft Torque Measurement During Acceleration Test

Project Descriptions