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Day in Engineering History Archive - April 28

April 28

"Philosophiae Naturalis Principia Mathematica" -  Please click here to visit RF Cafe.Day in Engineering History April 28 Archive - RF Cafe1686: The first volume of Isaac Newton's "Philosophiae Naturalis Principia Mathematica" was presented to the Royal Society. 1774: Francis Baily, who studied the solar eclipse phenomenon of Baily's Beads, was born. 1843: Noah Webster, creator of America's first dictionary, died. 1916: Ferruccio Lamborghini, of sports car fame, was born. 1919: The first jump with the Army manually operated parachute was made. 1926: The term "wave mechanics" was coined by nuclear physicist Erwin Schrödinger in a letter addressed to Albert Einstein. 1927: The first test flight of the Spirit of St. Louis was conducted. 1928: Eugene Shoemaker, of Comet P/Shoemaker-Levy 9 fame, was born. 1930: The first motion picture of a total eclipse of the sun was taken from an airplane flying over Honey Lake, CA. 1937: Pan American Airlines made the first commercial flight across the Pacific using its infamous Clipper seaplane. 1952: The U.S. occupation of Japan ended (we've been good friends ever since). 1986: Russia announced the Chernobyl nuclear plant disaster.

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Note: These historical tidbits have been collected from various sources, mostly on the Internet. As detailed in this article, there is a lot of wrong information that is repeated hundreds of times because most websites do not validate with authoritative sources. On RF Cafe, events with hyperlinks have been verified. Many years ago, I began commemorating the birthdays of notable people and events with special RF Cafe logos. Where available, I like to use images from postage stamps from the country where the person or event occurred. Images used in the logos are often from open source websites like Wikipedia, and are specifically credited with a hyperlink back to the source where possible. Fair Use laws permit small samples of copyrighted content.

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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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