@brodiej I am getting some odd results plotting an upwind course. I have a polar that starts at 35 degrees TWA and its routing me as close as 16 degrees TWA at 8kts of wind. It looks like its interpolating the data between 0 and 35 degrees but in such light winds, I expect the best VMG would be around 40-45 degrees TWA.

I tried the Bavaria 46 polar and my own polar, both give these types of TWA's of between 15 and 25 degrees.

@brodiej I am getting some odd results plotting an upwind course. I have a polar that starts at 35 degrees TWA and its routing me as close as 16 degrees TWA at 8kts of wind. It looks like its interpolating the data between 0 and 35 degrees but in such light winds, I expect the best VMG would be around 40-45 degrees TWA.

I tried the Bavaria 46 polar and my own polar, both give these types of TWA's of between 15 and 25 degrees.