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Loading the updated J111 class polar file:
It only keeps TWS 4 6 10 14 30...
Is this expected?
In my own exploration I discoved the TWS curves all need to have the same number of points with no duplicates...
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The text file has issues with the line ends. Microsoft expects line ends to be \r\n and some of these are just \r.
I see the sail chart from that site has the same issue.
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Thanks Nick --- Cleaning the files fixed the issues.