Charles Renard (1847-1905), French military engineer, started to work after the Franco-Prussian War of 1870/71 on the design of air ships at the French army aeronautical department. Together with his brother Paul and Arthur C. Krebs, he constructed in 1884 the dirigible war balloon "La France", which had its maiden flight on 1884-08-09 and was presented at the Paris Exposition Universelle (1889). 1847 was a common year starting on Friday (see link for calendar). ... 1905 was a common year starting on Sunday (see link for calendar). ... The Franco-Prussian War (July 19, 1870 – May 10, 1871) was fought between France and Prussia (backed by the North German Confederation) allied with the south German states of Baden, Bavaria and Württemberg. ... 1884 is a leap year starting on Tuesday (click on link to calendar). ... Balloons are a type of lighter than air aircraft that remain aloft due to their buoyancy. ... The Maiden flight of an aircraft is the first occasion on which an aircraft leaves the ground of its own accord. ... 1884 is a leap year starting on Tuesday (click on link to calendar). ... August 9 is the 221st day of the year in the Gregorian Calendar (222nd in leap years), with 144 days remaining. ... The Exposition Universelle of 1889 was a Worlds Fair held in Paris, France from May 5, to October 31, 1889. ...
He also proposed a now widely used system of preferred numbers that was later named after him and became international standardISO 3. It helped the French army to reduce the number of different balloon ropes kept on inventory from 425 to 17. When developing a product, designers must choose numerous lengths, distances, diameters, volumes, and other characteristic quantities. ... Standards are produced by many organizations, some for internal usage only, others for use by a groups of people, groups of companies, or a subsection of an industry. ... Logo of the International Organization for Standardization The International Organization for Standardization (ISO or iso) is an international standard-setting body made up of representatives from national standards bodies. ... Coils of rope used for long-line fishing A rope is a length of fibers, twisted or braided together to improve strength, for pulling and connecting. ... In business management, inventory consists of a list of goods and materials held available in stock. ...
The French army engineer Col. CharlesRenard proposed in the 1870s a set of preferred numbers for use with the metric system.
The factor between two consecutive numbers in a Renard series is constant (before rounding), namely the 5th, 10th, 20th, or 40th root of 10 (1.58, 1.26, 1.12, and 1.06, respectively), which leads to a geometric sequence.
As the Renard numbers repeat after every 10-fold change of the scale, they are particularly well-suited for use with SI units.
Charles Hubert Renard (my Grandfather 1880 -1958) - Composer - Appeared as the conductor in the original 1935 film 'The 39 Steps' (with Robert Donat), composed music for the coronation of Queen Elizabeth II.
Simon Renard (16th century) - the Holy Roman Emperor's Ambassador to the court of King Philip II of Spain in 1554.
CharlesRenard (not a known relation) - a 19th Century French inventor.
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