Curtiss's

Curtiss, Glenn Hammond Curtiss.

SUBJECT AREA: Aerospace

[br]

[br]

[br]

Curtiss started his career in the bicycle business, then became a designer of motor-cycle engines, and in 1904 he designed and built an airship engine. The success of his engine led to him joining the Aerial Experimental Association (AEA), founded by the inventor Alexander Graham Bell. Working with the AEA, Curtiss built several engines and designed a biplane, June Bug, in which he won a prize for the first recorded flight of over 1 km (1,100yd) in the USA. In 1909 Curtiss joined forces with Augustus M.Herring, who had earlier flown Octave Chanute's gliders, to form the Herring-Curtiss Company. Their Gold Bug was a success and led to the Golden Flyer, in which Glenn Curtiss won the Gordon Bennett Cup at Rheims in France with a speed of 75.7 km/h (47 mph). At this time the Wright brothers accused Curtiss and the new Curtiss Aeroplane Company of infringing their patent rights, and a bitter lawsuit ensued. The acrimony subsided during the First World War and in 1929 the two companies merged to form the Curtiss-Wright Corporation.

Curtiss had started experimenting with water-based aircraft in 1908, but it was not until 1911 that he managed to produce a successful float-plane. He then co-operated with the US Navy in developing catapults to launch aircraft from ships at sea. During the First World War, Curtiss produced the JN-4 Jenny trainer, which became probably his best-known design. This sturdy bi-plane continued in service long after the war and was extensively used by "barnstorming" pilots at air shows and for early mail flights. In 1919 a Navy-Curtiss NC-4 flying boat achieved the first flight across the Atlantic, having made the crossing in stages, refuelling en route. Curtiss himself, however, had little interest in aviation in his later years and turned his attention to real-estate development in Florida.

[br]

см United States v. Curtiss-Wright Export Corporation

Glenn Curtiss, Glenn Hammond Curtiss.

Curtiss, Bird and Hassager theory — теория Куртиса, Берда, Хассагера

SUBJECT AREA: Aerospace

[br]

[br]

[br]

After obtaining a degree in engineering, Fabre specialized in hydrodynamics. Around 1904 he developed an interest in flying and followed the progress of early French aviators such as Archdeacon, Voisin and Blériot who were experimenting with float-gliders. Fabre carried out many experiments during the following years, including airflow tests on various surfaces and hydrodynamic tests on different designs for floats. He also built a propeller-driven motor car to develop the most efficient design for a propeller. In 1909 he built his first "hydro-aeroplane", but it failed to fly. By March 1910 he built a new float plane which was very different from contemporary French aeroplanes. It was a tail-first (canard) monoplane and had unusual Warren girder spars exposed to the airstream. The engine was a conventional Gnome rotary mounted at the rear of the machine. On 28 March 1910 Fabre, who had no previous experience of flying, decided he was ready to test his hydro-aeroplane. First he made several straight runs to test the planing properties of his three floats, then he made several short hops. In the afternoon Fabre took off from the harbour at La Mède near Marseille before official witnesses: he was able to claim the first flight by a powered seaplane. His hydro-aeroplane is preserved in the Musée de l'Air et de l'Espace in Paris.

Despite several accidents, Fabre continued to improve his design and in October of 1910 Glenn Curtiss, the American designer, visited Fabre to compare notes. A year later Curtiss built the first of his many successful seaplanes. Fabre did not continue as an aircraft designer, but he went on to design and manufacture floats for other people.

[br]

General subject: model after (The company focused mainly on a series of flying boats, which initially were modeled after the American aircraft Curtiss Model K.)

(Versatile Performance Switching) шина VPX

See also: INDEX BY SUBJECT AREA

[br]

Ader, Clément

Bacon, Francis Thomas

Barber, John

Blériot, Louis

Blumlein, Alan Dower

Boeing, William Edward

Boot, Henry Albert Howard

Braun, Wernher Manfred von

Breguet, Louis

Camm, Sir Sydney

Caproni, Giovanni Battista

Cayley, Sir George

Chanute, Octave Alexandre

Charles, Jacques Alexandre César

Cierva, Juan de la

Clarke, Arthur Charles

Cobham, Sir Alan John

Cockerell, Christopher Sydney

Cody, "Colonel" Samuel Franklin

Curtiss, Glenn Hammond

Dassault, Marcel

de Havilland, Sir Geoffrey

Douglas, Donald Wills

Dunne, John William

Ellehammer, Jacob Christian Hansen

Fabre, Henri

Farman, Henri

Flettner, Anton

Flügge-Lotz, Irmgard

Focke, E.H.Heinrich

Fokker, Anthony Herman Gerard

Giffard, Baptiste Henry Jacques

Goddard, Dr Robert Hutchings

Green, Charles

Griffith, Alan Arnold

Handley Page, Sir Frederick

Heinkel, Ernst

Henson, William Samuel

Ilyushin, Sergei Vladimirovich

Johnson, Clarence Leonard

Junkers, Hugo

Korolov, Sergei Pavlovich

Langley, Samuel Pierpont

Lebaudy, Paul

Leonardo da Vinci

Levavasseur, Léon

Lilienthal, Otto

MacCready, Paul

Martin, Sir James

Maxim, Sir Hiram Stevens

Messerschmitt, Willi E.

Meusnier, Jean Baptiste Marie

Mignet, Henri

Mikoyan, Artem Ivanovich

Mitchell, Reginald Joseph

Montgolfier, Joseph-Michel

Oberth, Hermann Julius

Ohain, Hans Joachim Pabst von

Parseval, August von

Phillips, Horatio Frederick

Piccard, Auguste

Pierce, John Robinson

Pilcher, Percy Sinclair

Renard, Charles

Ricardo, Sir Harry Ralph

Roe, Sir Edwin Alliott Verdon

Rogallo, Francis Melvin

Santos-Dumont, Alberto

Saulnier, Raymond

Séguin, Louis

Short, Hugh Oswald

Sikorsky, Igor Ivanovich

Sopwith, Sir Thomas Octave Murdoch

Sperry, Elmer Ambrose

Stringfellow, John

Tsiolkovsky, Konstantin Eduardovich

Tupolev, Andrei Nikolayevich

Voisin, Gabriel

Wallis, Sir Barnes Neville

Watson-Watt, Sir Robert Alexander

Wenham, Francis Herbert

Whittle, Sir Frank

Wright, Wilbur

Yost, Paul Edward

Zeppelin, Count Ferdinand von

SUBJECT AREA: Telecommunications

[br]

[br]

[br]

Bell's grandfather was a professor of elocution in London and his father an authority on the physiology of the voice and on elocution; Bell was to follow in their footsteps. He was educated in Edinburgh, leaving school at 13. In 1863 he went to Elgin, Morayshire, as a pupil teacher in elocution, with a year's break to study at Edinburgh University; it was in 1865, while still in Elgin, that he first conceived the idea of the electrical transmission of speech. He went as a master to Somersetshire College, Bath (now in Avon), and in 1867 he moved to London to assist his father, who had taken up the grandfather's work in elocution. In the same year, he matriculated at London University, studying anatomy and physiology, and also began teaching the deaf. He continued to pursue the studies that were to lead to the invention of the telephone. At this time he read Helmholtz's The Sensations of Tone, an important work on the theory of sound that was to exert a considerable influence on him.

In 1870 he accompanied his parents when they emigrated to Canada. His work for the deaf gained fame in both Canada and the USA, and in 1873 he was apponted professor of vocal physiology and the mechanics of speech at Boston University, Massachusetts. There, he continued to work on his theory that sound wave vibrations could be converted into a fluctuating electric current, be sent along a wire and then be converted back into sound waves by means of a receiver. He approached the problem from the background of the theory of sound and voice production rather than from that of electrical science, and by 1875 he had succeeded in constructing a rough model. On 7 March 1876 Bell spoke the famous command to his assistant, "Mr Watson, come here, I want you": this was the first time a human voice had been transmitted along a wire. Only three days earlier, Bell's first patent for the telephone had been granted. Almost simultaneously, but quite independently, Elisha Gray had achieved a similar result. After a period of litigation, the US Supreme Court awarded Bell priority, although Gray's device was technically superior.

In 1877, three years after becoming a naturalized US citizen, Bell married the deaf daughter of his first backer. In August of that year, they travelled to Europe to combine a honeymoon with promotion of the telephone. Bell's patent was possibly the most valuable ever issued, for it gave birth to what later became the world's largest private service organization, the Bell Telephone Company.

Bell had other scientific and technological interests: he made improvements in telegraphy and in Edison's gramophone, and he also developed a keen interest in aeronautics, working on Curtiss's flying machine. Bell founded the celebrated periodical Science.

[br]

SUBJECT AREA: Aerospace

[br]

[br]

[br]

Professor Langley was a distinguished mathematician and astronomer who became Secretary of the Smithsonian Institution (US National Museum) in 1887. He was also interested in aviation and embarked on a programme of experiments with a whirling arm to test wings and with a series of free-flying models. In 1896 one of his steam-powered models made a flight of 4,199 ft (1,280 m): this led to a grant from the Government to subsidize the construction of a manned aeroplane. Langley commissioned Stephen M. Balzer, an automobile engine designer, to build a lightweight aero-engine and appointed his assistant, Charles M.Manly, to oversee the project. After many variations, including rotary and radical designs, two versions of the Balzer-Manly engine were produced, one quarter size and one full size. In August 1903 the small engine powered a model which thus became the first petrol-engined aeroplane to fly. Langley designed his full-size aeroplane (which he called an Aerodrome) with tandem wings and a cruciform tail unit. The Balzer-Manly engine drove two pusher propellers. Manly was to be the pilot as Langley was now almost 70 years old. Most early aviators tested their machines by making tentative hops, but Langley decided to launch his Aerodrome by catapult from the roof of a houseboat on the Potomac river. Two attempts were made and on both occasions the Aerodrome crashed into the river: catapult problems and perhaps a structural weakness were to blame. The second crash occurred on 8 December 1903 and it is ironic that the Wright brothers, with limited funds and no Government support, successfully achieved a manned flight just nine days later. Langley was heartbroken. After his death there followed a strange affair in 1914 when Glenn Curtiss took Langley's Aerodrome, modified it, and tried to prove that but for the faulty catapult it would have flown before the Wrights' Flyer. A brief flight was made with floats instead of the catapult, and it flew rather better after more extensive modifications and a new engine.

[br]

SUBJECT AREA: Automotive engineering, Land transport, Steam and internal combustion engines

[br]

[br]

[br]

Wankel was first employed at the German Aeronautical Research Establishment, where he worked on rotary valves and valve sealing techniques in the early 1930s and during the Second World War. In 1951 he joined NSU Motorenwerk AG, a motor manufacturer based at Neckarsulm, near Stuttgart, and began work on his rotary engine; the idea for this had first occurred to Wankel as early as 1929. He had completed his first design by 1954, and in 1957 his first prototype was tested. The Wankel engine has a three-pointed rotor, like a prism of an equilateral triangle but with the sides bowed outwards. This rotor is geared to a driveshaft and rotates within a closely fitting and slightly oval-shaped chamber so that, on each revolution, the power stroke is applied to each of the three faces of the rotor as they pass a single spark plug. Two or more rotors may be mounted coaxially, their power strokes being timed sequentially. The engine has only two moving parts, the rotor and the output shaft, making it about a quarter less in weight compared with a conventional piston engine; however, its fuel consumption is high and its exhaust emissions are relatively highly pollutant. The average Wankel engine speed is 5,500 rpm. The first production car to use a Wankel engine was the NSU Ro80, though this was preceded by the experimental NSU Spyder prototype, an open two-seater. The Japanese company Mazda is the only other automobile manufacturer to have fitted a Wankel engine to a production car, although licences were taken by Alfa Romeo, Peugeot- Citroën, Daimler-Benz, Rolls-Royce, Toyota, Volkswagen-Audi (the company that bought NSU in the mid-1970s) and many others; Daimler-Benz even produced a Mercedes C-111 prototype with a three-rotor Wankel engine. The American aircraft manufacturer Curtiss-Wright carried out research for a Wankel aero-engine which never went into production, but the Austrian company Rotax produced a motorcycle version of the Wankel engine which was fitted by the British motorcycle manufacturer Norton to a number of its models.

While Wankel became director of his own research establishment at Lindau, on Lake Constance in southern Germany, Mazda continued to improve the rotary engine and by the time of Wankel's death the Mazda RX-7 coupé had become a successful, if not high-selling, Wankel -engined sports car.

[br]

SUBJECT AREA: Aerospace

[br]

[br]

[br]

Wilbur and Orville designed and built bicycles in Dayton, Ohio. In the 1890s they developed an interest in flying which led them to study the experiments of gliding pioneers such as Otto Lilienthal in Germany, and their fellow American Octave Chanute. The Wrights were very methodical and tackled the many problems stage by stage. First, they developed a method of controlling a glider using movable control surfaces, instead of weight-shifting as used in the early hand-gliders. They built a wind tunnel to test their wing sections and by 1902 they had produced a controllable glider. Next they needed a petrol engine, and when they could not find one to suit their needs they designed and built one themselves.

On 17 December 1903 their Flyer was ready and Orville made the first short flight of 12 seconds; Wilbur followed with a 59-second flight covering 853 ft (260 m). An improved design, Flyer II, followed in 1904 and made about eighty flights, including circuits and simple ma-noeuvres. In 1905 Flyer III made several long flights, including one of 38 minutes covering 24½ miles (39 km). Most of the Wrights' flying was carried out in secret to protect their patents, so their achievements received little publicity. For a period of two and a half years they did not fly, but they worked to improve their Flyer and to negotiate terms for the sale of their invention to various governments and commercial syndi-cates.

In 1908 the Wright Model A appeared, and when Wilbur demonstrated it in France he astounded the European aviators by making several flights lasting more than one hour and one of 2 hours 20 minutes. Considerable numbers of the Model A were built, but the European designers rapidly caught up and overtook the Wrights. The Wright brothers became involved in several legal battles to protect their patents: one of these, with Glenn Curtiss, went on for many years. Wilbur died of typhoid fever in 1912. Orville sold his interest in the Wright Company in 1915, but retained an interest in aeronautical research and lived on to see an aeroplane fly faster than the speed of sound.

[br]