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Kirt Blattenberger - RF Cafe WebmasterCopyright
1996 - 2016
Webmaster:
Kirt Blattenberger,
 BSEE - KB3UON

RF Cafe began life in 1996 as "RF Tools" in an AOL screen name web space totaling 2 MB. Its primary purpose was to provide me with ready access to commonly needed formulas and reference material while performing my work as an RF system and circuit design engineer. The Internet was still largely an unknown entity at the time and not much was available in the form of WYSIWYG ...

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The NUMB3RS Behind Rock Skipping
Kirt's Cogitations™ #104

These original Kirt's Cogitations™ may be reproduced (no more than 5, please) provided proper credit is given to me, Kirt Blattenberger.

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   Cog·i·ta·tion [koj-i-tey'-shun] – noun: Concerted thought or reflection; meditation; contemplation.
   Kirt [kert] – proper noun: RF Cafe webmaster.

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The NUMB3RS Behind Rock Skipping

Skiffing, smutting, ricochet, "ducks and drakes." Those are all names for the art of rock skipping. It is now as much of a science as an art, thanks to physicist Lyderic Bocquet and his young son. Mr. Bocquet formulated equations of motion for stones, modeling them as a thin, flat object bouncing off a uniform surface. He discovered that the stones initial rate of speed and spin rate were the biggest factors in the stone's ability to skip multiple times. A high rate of spin generates a gyroscopic effect that prevents the stone from tumbling and diving into the water. Per his equations, the world record of 38 skips corresponds to a stone flying 12 meters while spinning at a rate of 14 revolutions/second.