John Whitridge Williams

John Whitridge Williams (January 26, 1866 – October 21, 1931) was a pioneering obstetrician at Johns Hopkins Hospital.

Biography

He was born in Baltimore, Maryland on January 26, 1866. He received his A.B. from the Johns Hopkins University in 1886. He received his M.D. from the University of Maryland in 1888. He then studied bacteriology and pathology at universities in Berlin and Vienna. In 1889 he returned to Baltimore to be an assistant to Howard A. Kelly at the Johns Hopkins Hospital. He died on October 21, 1931 from complications of an abdominal surgery. After serving under Dr. Howard Kelly, J. Whitridge Williams was appointed as chief of Obstetrics at the Johns Hopkins Hospital, a position he held until his untimely death in 1931. J. Whitridge Williams was the author of the first five editions of the Williams Obstetrics textbook.

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JW

JW may refer to:

People

Other uses

Kyushu J7W

The Kyūshū J7W Shinden (震電, "Magnificent Lightning") fighter was a World War II Japanese propeller-driven aircraft prototype that was built in a canard design. The wings were attached to the tail section and stabilizers were on the front. The propeller was also in the rear, in a pusher configuration.

Developed by the Imperial Japanese Navy (IJN) as a short-range, land-based interceptor, the J7W was a response to B-29 Superfortress raids on the Japanese home islands. For interception missions, the J7W was to be armed with four forward-firing 30 mm cannons in the nose.

The Shinden was expected to be a highly maneuverable interceptor, but only two prototypes were finished before the end of war. A jet engine–powered version was considered, but never even reached the drawing board.

Design and development

In the IJN designation system, "J" referred to land-based fighters and "W" to Watanabe Tekkōjo, the company that oversaw the initial design.

The idea of a canard-based design originated with Lieutenant Commander Masayoshi Tsuruno, of the technical staff of the IJN in early 1943. Tsuruno believed the design could easily be retrofitted with a turbojet, when suitable engines became available. His ideas were worked out by the First Naval Air Technical Arsenal (Dai-Ichi Kaigun Koku Gijitsusho), which designed three gliders designated Yokosuka MXY6, featuring canards. These were built by Chigasaki Seizo K. K. and one was later fitted with a 22 hp Semi 11 (Ha-90) 4-cylinder air-cooled engine.

Waco Custom Cabin series

The Waco Custom Cabins were a series of up-market single-engined four-to-five-seat cabin sesquiplanes of the late 1930s produced by the Waco Aircraft Company of the United States. "Custom Cabin" was Waco's own description of the aircraft which despite minor differences, were all fabric-covered biplanes.

Design