Mr. Konrad Lorentz 2 Report post Posted June 10, 2013 Sailing is fun! More and more gadgets are used to make sailing on yachts more "efficient". I will sail longer distances and will take part in an offshore race. Polar diagrams will help me to find out the boat speed on the predicted wind conditions. But I hadn't the correct format of the polar information to use it in my programs. I want to use QTVlm and iRegatta. I decided to remodel my curves in the FRIENDSHIP-Framework (CAESES will also work) using interpolation curves. I created a GLPictureframe. loaded the polar plot image found in the web as png. I switched to the grid view and added some points on the curve (windspeed curve). Put them into a scope, used these points to create an interpolation curve. The curves are there! The next step is to define a functionality to get the boat speed using the TWA (TrueWindAngle) and the TWS (TrueWindSpeed). Now I created a loop around it, to call the function with different curves (windspeeds) and different attack angles. "Playing" around: (press the Run button on the feature) Next step: Put the console output into a text file, load it in your app and have fun. QtVlm's folder for polar plots is: C:\Program Files\qtVlm\polariRegatta can import it out of DropBox with the "Open in iRegatta" Option.polar.fdb Share this post Link to post Share on other sites
