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Day in Engineering History Archive - July 7

| Jan | Feb | Mar | Apr | May | Jun |
| Jul | Aug | Sep | Oct | Nov | Dec |

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.
Please submit significant historical events and dates for inclusion in these lists. I will be glad to include your name and birthday. Please do not submit your death date ;-) A couple 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.

July 7

Solar Challenger Crosses the English Channel. - Please click here to visit RF Cafe.

1668: Sir Isaac Newton received his M.A. from Trinity College in Cambridge. 1802: The first comic book "The Wasp," was published. 1816: Astronomer Rudolf Wolf, who discovered the 11-year sunspot cycle, was born. 1914: Robert Goddard received a patent for his two-stage solid fuel rocket. 1930: Construction began on Boulder Dam (later renamed Hoover Dam). 1930: Sir Arthur Conan Doyle, of Sherlock Holmes fame, died. 1936: Several U.S. patents were issued for the Phillips-head screw and screwdriver to its inventor, Henry Phillips. 1950: The first Farnborough Air Show was held. 1952: The last London tram, No. 1951, ceased operation. 1981: Solar Challenger, the first solar-powered aircraft, crossed the English Channel. 1986: IBM-PC DOS Version 3.2 (updated) was released. 1997: The temperature dipped to 24 °F in Tower, MN. 2005: Muslim extremists attacked the London transport system, killing 37 people.


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