Safety Comes First - 2009/02

Clocking the speed of propeller tips
HAVE YOU EVER wondered exactly how fast the tips of our
propellers go? I lurked through an Internet discussion on this subject,
and, sure enough, somebody did the math and shared the answer. The
formula is not difficult, if you passed geometry and algebra. Hank
Sperzel must have gotten an A in both classes, because he showed and
explained the math.

Safety Comes First

I LOVE ATTENDING the AMA
Convention at Ontario, California! Besides
seeing old friends and new and all that
modeling stuff, I can gather enough
column material to last me several months.
First, the photos.

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