Rob at Paramount Skates has offered some useful tools and some insight to help explain what exactly the radius of the blade means and it’s function. Check it out:
Click on image to enlarge
The figure skater spins and jumps on the small curve in front. Please look at the enclosed drawing.
The 7 or 8 foot curve is used to stroke and glide.
The skater only skates on small sections of the blade. I think everyone has watched the video and saw the bumps and flat spots in the 7 or 8 foot curves. Some sections are 22 feet some only 6 feet,