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21 Saulnier, Raymond
SUBJECT AREA: Aerospace[br]b. late eighteenth century Franced. mid-twentieth century[br]French designer of aircraft, associated with Louis Blériot and later the Morane- Saulnier company.[br]When Louis Blériot made his historic flight across the English Channel in 1909, the credit for the success of the flight naturally went to the pilot. Few people thought about the designer of the successful aeroplane, and those who did assumed it was Blériot himself. Blériot did design several of the aeroplanes bearing his name, but the cross- Channel No. XI was mainly designed by his friend Raymond Saulnier, a fact not; broadcast at the time.In 1911 the Morane-Saulnier company was founded in Paris by Léon (1885–1918) and Robert (1886–1968) Morane and Raymond Saulnier, who became Chief Designer. Flying a Morane-Saulnier, Roland Garros made a recordbreaking flight to a height of 5,611 m (18,405 ft) in 1912, and the following year he made the first non-stop flight across the Mediterranean. Morane-Saulnier built a series of "parasol" monoplanes which were very widely used during the early years of the First World War. With the wing placed above the fuselage, the pilot had an excellent downward view for observation purposes, but the propeller ruled out a forward-firing machine gun. During 1913–4, Raymond Saulnier was working on an idea for a synchronized machine gun to fire between the blades of the propeller. He could not overcome certain technical problems, so he devised a simple alternative: metal deflector plates were fitted to the propeller, so if a bullet hit the blade it did no harm. Roland Garros, flying a Type L Parasol, tested the device in action during April 1915 and was immediately successful. This opened the era of the true fighter aircraft. Unfortunately, Garros was shot down and the Germans discovered his secret weapon: they improved on the idea with a fully synchronized machine gun fitted to the Fokker E 1 monoplane. The Morane-Saulnier company continued in business until 1963, when it was taken over by the Potez Group.[br]Further ReadingJane's Fighting Aircraft of World War I, 1990, London: Jane's (reprint) (provides plans and details of 1914–18 Morane-Saulnier aeroplanes).JDS -
22 Wenham, Francis Herbert
SUBJECT AREA: Aerospace[br]b. 1824 London, Englandd. 11 August 1908 Folkestone, England[br]English engineer, inventor and pioneer aerodynamicist who built the first wind tunnel.[br]Wenham trained as a marine engineer and later specialized in screw propellers and high-pressure engines. He had many interests. He took his steamboat to the Nile and assisted the photographer F.Frith to photograph Egyptian tombs by devising a series of mirrors to deflect sunlight into the dark recesses. He experimented with gas engines and produced a hot-air engine. Wenham was a leading, if controversial, figure in the Microscopical Society and a member of the Royal Photographic Society; he developed an enlarger.Wenham was interested in both mechanical and lighter-than-air flight. One of his friends was James Glaisher, a well-known balloonist who made many ascents to gather scientific information. When the (Royal) Aeronautical Society of Great Britain was founded in 1866, the Rules were drawn up by Wenham, Glaisher and the Honorary Secretary, F.W.Brearey. At the first meeting of the Society, on 27 June 1866, "On aerial locomotion and the laws by which heavy bodies impelled through the air are sustained" was read by Wenham. In his paper Wenham described his experiments with a whirling arm (used earlier by Cayley) to measure lift and drag on flat surfaces inclined at various angles of incidence. His studies of birds' wings and, in particular, their wing loading, showed that they derived most of their lift from the front portion, hence a long, thin wing was better than a short, wide one. He published illustrations of his glider designs covering his experiments of c. 1858–9. One of these had five slender wings one above the other, an idea later developed by Horatio Phillips. Wenham had some success with a model, but no real success with his full-size gliders.In 1871, Wenham and John Browning constructed the first wind tunnel designed for aeronautical research. It utilized a fan driven by a steam engine to propel the air and had a working section of 18 in. (116 cm). Wenham continued to play an important role in aeronautical matters for many years, including a lengthy exchange of ideas with Octave Chanute from 1892 onwards.[br]Principal Honours and DistinctionsHonorary Member of the (Royal) Aeronautical Society.BibliographyWenham published many reports and papers. These are listed, together with a reprint of his paper "Aerial locomotion", in the Journal of the Royal Aeronautical Society (August 1958).Further ReadingTwo papers by J.Laurence Pritchard, 1957, "The dawn of aerodynamics" Journal of the Royal Aeronautical Society (March); 1958, "Francis Herbert Wenham", Journal of the Royal Aeronautical Society (August) (both papers describe Wenham and his work).J.E.Hodgson, 1924, History of Aeronautics in Great Britain, London.JDSBiographical history of technology > Wenham, Francis Herbert
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