SailNet Community - View Single Post - Velocity Predictions Polar Diagram
View Single Post
post #7 of Old 07-15-2011
Senior Member
pdqaltair's Avatar
Join Date: Nov 2008
Location: Deale, MD
Posts: 2,994
Thanks: 1
Thanked 90 Times in 89 Posts
Rep Power: 9
They are not too difficult to create, but it does take time.

Simply take many data points and plot with Excel as a circle plot.

Sail Delmarva: Speed Polars

You have to play some games with interpolation and smothing, since wave conditions and load will vary over time. In someways the targets of others are better (depending on how they were developed) and in some ways your own are more valid.

I found I mostly worked on this during long, dull watches.

Writing full-time since 2014

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

"Keeping a Cruising Boat for Peanuts"
"Faster Cruising for the Coastal Sailor"
"Singlehanded Sailing for the Coastal Sailor"
pdqaltair is offline  
Quote Share with Facebook
For the best viewing experience please update your browser to Google Chrome