- MODEL TESTING -

In April 2005 Craig Loomes Design Group conducted a scientific tow testing programme,  using a 2.6m scale model to verify the practicality of the Powersail 15m’s hull shape, its patented twin rudder stern squat prevention system and determine the horsepower required to power  the vessel under motor at 18 knots.

A computer on board the towing vessel simultaneously recorded both the electronic signals of the model towing speed and the tow line tension, obtained from a transmitting GPS and a precision load cell.  The data collected from the extensive testing was then used in an internationally accepted formula for tank testing scale models to arrive at a conclusion.

Observation of the tests clearly demonstrated that the vertical forces generated by the toed out twin rudders were more than adequate to control the trim of the vessel enabling it to motor well above its hull speed.   Secondly, the calculated test results showed the vessel would require 460hp to motor at 18 knots.

Click on the image above to download a copy of the tow test video - the file size is 1.9Mb, so depending on your internet connection speed it may take a while to download. The video clearly shows the amazingly clean wake achieved by the Powersail 15m, with its  hydro-dynamically efficient hull shape, when trimmed correctly.  This is in stark contrast to the wake generated by an equivalent displacement, inefficient flat bottomed power boat at the same speed.