Mailport July 2011 Issue

Mailport: July 2011

More Math Fun

I’m sure others have pointed this out, but ex-professors can’t let such things pass. Reader Tom Nies (Mailport, June 2011) is correct in his “You Do the Math” letter: The area of a circle is usually expressed as Pi times Radius squared (Pi x R2), and varies as the square of the radius. But if you substitute the diameter measurement, which is twice the radius (R=D/2) in the equation, you get Area=Pi/4 x D2, so your original statement that the area varies as the square of the diameter was also correct. Now you see why ex-math professors don’t get invited to many parties.

Tom John
Pandora’s Boat, New Horizon 25
Hudson, Fla.

Next: Rope Cleaning

Comments (1)

Hey. This letter is two jammed together with some text missing.

Regarding the epoxy testing, please also consider testing products from Progressive Epoxies (epoxyproducts.com). The proprietor, Paul Orman, has a rather cacophonic website, but he seems to have a very good product line at practical prices. I'm doing a huge hull blister re-lamination using their "Premium No Blush" cycloaliphatic epoxy, and I'd love to know how that stacks up to West. I've never had trouble with West, but I want the best epoxy on my bottom & blush is just more work. Are non-blushing epoxies really a free lunch? I considered Raka, East, System 3, and MAS before settling. Initial results are good, but I cannot test like PS can! Thansk!

Posted by: PAUL S | September 1, 2011 1:12 PM    Report this comment

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