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Produced. 1928–1931. Number built. 184 [1] -254 (total for 3C3, 4C3, 5C3, BS-14 and BS-16) [note 1] Command Aire 3C3 prototype from Aero Digest, February 1928. The Command-Aire 3C3 and similar 4C3 and 5C3 are American three-seat open cockpit utility, training and touring biplanes developed by Command-Aire in the late 1920s and early 1930s.
The stepped reckoner or Leibniz calculator was a mechanical calculator invented by the German mathematician Gottfried Wilhelm Leibniz (started in 1673, when he presented a wooden model to the Royal Society of London [2] and completed in 1694). [1] The name comes from the translation of the German term for its operating mechanism, Staffelwalze ...
Command-Aire 5C3 N997E. The Command-Aire was an American aircraft manufacturer from the late 1920s and early 1930s based in Little Rock, Arkansas.
Curta. Curta Type I, on display at the Musée des Arts et Métiers, Paris. The Curta is a hand-held mechanical calculator designed by Curt Herzstark. [1] It is known for its extremely compact design: a small cylinder that fits in the palm of the hand.
Shenyang WS-10. The CFM International CFM56 (U.S. military designation F108) series is a Franco-American family of high-bypass turbofan aircraft engines made by CFM International (CFMI), with a thrust range of 18,500 to 34,000 lbf (82 to 150 kN). CFMI is a 50–50 joint-owned company of Safran Aircraft Engines (formerly known as Snecma) of ...
HP-35 calculators were carried on the Skylab 3 and Skylab 4 flights, between July 1973 and February 1974. [ 6 ] Is the first pocket calculator with a numeric range that covered 200 decades (more precise 199, ±10 ±99 ).
Pascal's calculator (also known as the arithmetic machine or Pascaline) is a mechanical calculator invented by Blaise Pascal in 1642. Pascal was led to develop a calculator by the laborious arithmetical calculations required by his father's work as the supervisor of taxes in Rouen. [2] He designed the machine to add and subtract two numbers ...
Fuller calculator, Fuller-Bakewell model of 1928. The Fuller calculator, sometimes called Fuller's cylindrical slide rule, is a cylindrical slide rule with a helical main scale taking 50 turns around the cylinder. This creates an instrument of considerable precision – it is equivalent to a traditional slide rule 25.40 metres (1,000 inches) long.
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