Looking to do a significant amount of offshore racing this year and I am looking to use the Squid Sailing (https://www.squid-sailing.com/en/) software to get weather and routing information.
In order to utilize the software effectively I need to input my boat's polar information. I have some polars which I got from the ORC rating system (https://jieter.github.io/orc-data/site/) for a Jeanneau Sun Fast 37, however they are in wind speeds of 6kts, 8kts, 10kts, 12kts, 14kts, 16kts and 20kts.
The Squid Sailing polar wind speeds are in increments of 5kts ranging from 5kts to 60kts.
Is there an easy way to translate the polar information I have to the polar information required by Squid Sailing? Or could anyone provide me with Sun Fast 37 polars they have already input into Squid Sailing?
Any help would be appreciated, and again - thanks all!!
You can interpolate and extrapolate the polars to 5 knot increments. It can be done with any type of general purpose calculation tool, such as dedicated math software (Matlab, Octave, Mathcad, Mathematica etc), or spreadsheet software (Excel, Numbers), or any programming language. If you don't have the knowledge to do it yourself, maybe you have a friend or a family member who has.
Extrapolating from 20 to 60 knots requires some assumptions, for example that downwind speeds don't increase much above 20 knots, and that upwind speeds decrease above 25-30 knots.
Thanks Johannes, I was going to do a rough calculation to get to the 5kts increments. In terms of extrapolating from 20kts to 60kts Squid Sailing has that polar data for certain boats within the software already.
I was going to find a similar boat, take my data above and extrapolate to 60kts using the incremental movements from the other boats polar data.
Not the most scientific (by any means!!) but I think will serve as a decent starting point.