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Axial Engine
Axial engines (sometimes known as barrel or Z-crank engines) are a type of reciprocating engine A reciprocating engine, also often known as a piston engine, is typically a heat engine that uses one or more reciprocating pistons to convert high temperature and high pressure into a rotating motion. This article describes the common featu ... with pistons arranged around an output shaft with their axes parallel to the shaft. Barrel refers to the cylindrical shape of the cylinder group (result of the pistons being spaced evenly around the central crankshaft and aligned parallel to the crankshaft axis) whilst the Z-crank alludes to the shape of the crankshaft. The key advantage of the axial design is that the cylinders are arranged in parallel around the output/crank shaft in contrast to radial and inline engines, both types having cylinders at right angles to the shaft. As a result, it is a very compact, cylindrical engine, allowing variation in compression ratio of the engine w ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Almen A-4
Axial engines (sometimes known as barrel or Z-crank engines) are a type of reciprocating engine with pistons arranged around an output shaft with their axes parallel to the shaft. Barrel refers to the cylindrical shape of the cylinder group (result of the pistons being spaced evenly around the central crankshaft and aligned parallel to the crankshaft axis) whilst the Z-crank alludes to the shape of the crankshaft. The key advantage of the axial design is that the cylinders are arranged in parallel around the output/crank shaft in contrast to radial and inline engines, both types having cylinders at right angles to the shaft. As a result, it is a very compact, cylindrical engine, allowing variation in compression ratio of the engine while running. In a swashplate engine the piston rods stay parallel with the shaft, and piston side-forces that cause excessive wear can be eliminated almost completely. The small-end bearing of a traditional connecting rod, one of the most problematic be ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Charles Francis Walsh
Charles Francis Walsh (October 27, 1877 – October 3, 1912) was an American pioneer aviator who died in a crash in Trenton, New Jersey. Early life Charles Francis Walsh was born in Mission Valley, California, on October 27, 1877, to Mr. and Mrs. Walter C. Walsh. When he was a young boy, the family moved to nearby San Diego, California. Growing up, he worked in his father's grocery store. Enterprising even at an early age, he started his own bicycle business as a teenager, but this would be the first of several unsuccessful ventures for Walsh until his early thirties. In 1901, at the age of 24, he hitchhiked to Los Angeles and took a job as a stationary engineer at the California General Hospital in Los Angeles. It was there that he met a young nursing student named Alice Connolly. They were married on September 23, 1903. In January 1904, he and his new wife moved to Winslow, Arizona, where he went to work for the Union Pacific Railroad as a freight train engineer. Charles gr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Radial Engine
The radial engine is a reciprocating type internal combustion engine configuration in which the cylinders "radiate" outward from a central crankcase like the spokes of a wheel. It resembles a stylized star when viewed from the front, and is called a "star engine" in some other languages. The radial configuration was commonly used for aircraft engines before gas turbine engines became predominant. Engine operation Since the axes of the cylinders are coplanar, the connecting rods cannot all be directly attached to the crankshaft unless mechanically complex forked connecting rods are used, none of which have been successful. Instead, the pistons are connected to the crankshaft with a master-and-articulating-rod assembly. One piston, the uppermost one in the animation, has a master rod with a direct attachment to the crankshaft. The remaining pistons pin their connecting rods' attachments to rings around the edge of the master rod. Extra "rows" of radial cylinders can be added i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
United States Army Air Corps
The United States Army Air Corps (USAAC) was the aerial warfare service component of the United States Army between 1926 and 1941. After World War I, as early aviation became an increasingly important part of modern warfare, a philosophical rift developed between more traditional ground-based army personnel and those who felt that aircraft were being underutilized and that air operations were being stifled for political reasons unrelated to their effectiveness. The USAAC was renamed from the earlier United States Army Air Service on 2 July 1926, and was part of the larger United States Army. The Air Corps became the United States Army Air Forces (USAAF) on 20 June 1941, giving it greater autonomy from the Army's middle-level command structure. During World War II, although not an administrative echelon, the Air Corps (AC) remained as one of the combat arms of the Army until 1947, when it was legally abolished by legislation establishing the Department of the Air Force. The Air ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Seattle
Seattle ( ) is a seaport city on the West Coast of the United States. It is the seat of King County, Washington. With a 2020 population of 737,015, it is the largest city in both the state of Washington and the Pacific Northwest region of North America. The Seattle metropolitan area's population is 4.02 million, making it the 15th-largest in the United States. Its growth rate of 21.1% between 2010 and 2020 makes it one of the nation's fastest-growing large cities. Seattle is situated on an isthmus between Puget Sound (an inlet of the Pacific Ocean) and Lake Washington. It is the northernmost major city in the United States, located about south of the Canadian border. A major gateway for trade with East Asia, Seattle is the fourth-largest port in North America in terms of container handling . The Seattle area was inhabited by Native Americans for at least 4,000 years before the first permanent European settlers. Arthur A. Denny and his group of travelers, subsequ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
HRD Motorcycles
HRD Motors Ltd was a British motorcycle manufacturer in the 1920s. It was founded by Howard Raymond Davies. He had worked in motorcycling, and had raced with some success in the mid-twenties, but often not finishing due to unreliability. This inspired him to build a reliable performance motorcycle, using the advertising slogan "Built by a rider". Others also aimed at a similar market, like George Brough of Brough Superior motorcycles. After the First World War many motorcycle makers assembled their machines from engines and other major components sourced from different manufacturers. Davies' goal was to build a superior motorcycle from the best components available. Motorcycles were produced from 1924 to 1928, but the undercapitalised company, although having a reputation for performance, struggled to survive, and was ultimately sold to OK-Supreme, who then sold the name and goodwill to Phil Vincent, a motorcycle designer. The name was then incorporated into a new company, The V ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Phil Irving
Philip Edward Irving MBE, CEng., FIMechE., MSAE., (1903–1992) was an Australian engineer and author, most famous for the Repco-Brabham Formula One and Vincent motorcycle engines. He also worked at Velocette motorcycles, twice, and drew the engine of the 1960 EMC 125cc racer. Early life Irving was the son of a medical doctor who had a 600 square-mile practice in Western Victoria which he travelled around using a Swift car and two motorcycles, a belt-drive Triumph and a four-cylinder FN. Due to a lack of local repair facilities, Dr. Irving performed all the maintenance at home. After three years attendance at Wesley College, Phil Irving obtained a scholarship to Melbourne Technical College studying a diploma course in Mechanical and Electrical Engineering where he designed and partially made his first engine, a small air-cooled two-stroke. He didn't finish the course or the engine, leaving early on the strength of his college studies and accomplishments to take his first job. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Anthony Michell
Anthony George Maldon Michell FRS (21 June 1870 – 17 February 1959) was an Australian mechanical engineer of the early 20th century. Early life Michell was born in London while his parents were on a visit to England from Australia to which they had emigrated 17 years earlier. The family returned to Maldon, Victoria, in 1872, where young Anthony attended one of the state primary schools newly established in that area. He later returned to England and attended the Perse Grammar School while his elder brother, John Henry, attended Trinity College, Cambridge. On leaving school, A.G.M. Michell matriculated and spent one year as a non-collegiate student at Cambridge. In 1889, he returned to Australia and studied civil engineering at the University of Melbourne, graduating in 1895. For the next two years he obtained practical experience in structural engineering with the firm Johns and Waygood. He then returned to University, and completed a Master of Civil Engineering degree in 189 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
San Francisco
San Francisco (; Spanish language, Spanish for "Francis of Assisi, Saint Francis"), officially the City and County of San Francisco, is the commercial, financial, and cultural center of Northern California. The city proper is the List of California cities by population, fourth most populous in California and List of United States cities by population, 17th most populous in the United States, with 815,201 residents as of 2021. It covers a land area of , at the end of the San Francisco Peninsula, making it the second most densely populated large U.S. city after New York City, and the County statistics of the United States, fifth most densely populated U.S. county, behind only four of the five New York City boroughs. Among the 91 U.S. cities proper with over 250,000 residents, San Francisco was ranked first by per capita income (at $160,749) and sixth by aggregate income as of 2021. Colloquial nicknames for San Francisco include ''SF'', ''San Fran'', ''The '', ''Frisco'', and '' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sleeve Valve
The sleeve valve is a type of valve mechanism for piston engines, distinct from the usual poppet valve. Sleeve valve engines saw use in a number of pre-World War II luxury cars and in the United States in the Willys-Knight car and light truck. They subsequently fell from use due to advances in poppet-valve technology, including sodium cooling, and the Knight system double sleeve engine's tendency to burn a lot of lubricating oil or to seize due to lack of it. The Scottish Argyll company used its own, much simpler and more efficient, single sleeve system (Burt-McCollum) in its cars, a system which, after extensive development, saw substantial use in British aircraft engines of the 1940s, such as the Napier Sabre, Bristol Hercules, Centaurus, and the promising but never mass-produced Rolls-Royce Crecy, only to be supplanted by the jet engines. Description A sleeve valve takes the form of one or more machined sleeves. It fits between the piston and the cylinder wall in the cylin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aerial Derby
The Aerial Derby was an air race in the United Kingdom sponsored by the '' Daily Mail'' in which the competitors flew a circuit around London. It was first held in 1912, with subsequent races in 1913 and 1914. Suspended during the First World War, the event was revived in 1919 with a "Victory Aerial Derby". Further races were held in 1920, 1921,1922 and 1923. Although a race was scheduled for 1924 there were insufficient entries, and the event was cancelled and not held again. 1912 The first race, held on Saturday 8 June consisted of a single circuit of an course, starting and finishing at Hendon Aerodrome with control points at Kempton Park, Esher, Purley and Purfleet. At these contestants had to fly low enough for the judges to see the race number of their aircraft. The first prize was £250 and a gold cup. The first competition was the subject of enormous public interest, with around 45,000 people paying to view the start and finish at Hendon and enormous crowds gather ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Caudron G
The Caudron Type G was a single-engined French biplane built by Caudron, prior to World War I. Developments of the Caudron G saw widespread service in France, Russia and Great Britain Great Britain is an island in the North Atlantic Ocean off the northwest coast of continental Europe. With an area of , it is the largest of the British Isles, the largest European island and the ninth-largest island in the world. It is .... Specifications See also References Further reading * * {{Caudron aircraft 1910s French military reconnaissance aircraft Type G Sesquiplanes Single-engined tractor aircraft Aircraft first flown in 1913 Rotary-engined aircraft ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
