Carl McHenry on Morning Star sent along the KP44 Polar Diagrams, and US Sailing, which generated the diagrams, was kind enough to allow us to show them here. I will try to put an explanation of what a polar diagram is and how to use it in this spot, but meanwhile the following two links have some good information on them:
C34 FAQ: Polar Diagrams
Basic Downwind Performance Part 2 (Sailnet)
Polar Diagrams are © Copyright 2002, US Sailing. Reproduced by permission of US Sailing.
Download images:KP44 Polars (Adobe PDF File, 694.9 KB)