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Bristol Perseus
The Bristol Perseus was a British nine-cylinder, single-row, air-cooled radial aircraft engine produced by the Bristol Engine Company starting in 1932. It was the first production sleeve valve aero engine. Design and development In late 1925 and early 1926, the Royal Aircraft Establishment (RAE) published a series of papers by Harry Ricardo on the sleeve valve principle. The main advantages over the traditional poppet valves was better volumetric efficiency and the ability to operate at higher rotational speeds. This allowed a smaller engine to produce the same power as a larger one, leading to better fuel efficiency and compact design, particularly in multi-row radial engines. Roy Fedden, Bristol's primary engine designer, became interested in the concept and by 1927 he had constructed a working two-cylinder V as a test bed, with the idea of developing it into a V-12. Problems cropped up on the design, notably the sleeves bursting during the power stroke and stripping t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
WikiProject Aircraft
A WikiProject, or Wikiproject, is a Wikimedia movement affinity group for contributors with shared goals. WikiProjects are prevalent within the largest wiki, Wikipedia, and exist to varying degrees within Wikimedia project, sister projects such as Wiktionary, Wikiquote, Wikidata, and Wikisource. They also exist in different languages, and translation of articles is a form of their collaboration. During the COVID-19 pandemic, CBS News noted the role of Wikipedia's WikiProject Medicine in maintaining the accuracy of articles related to the disease. Another WikiProject that has drawn attention is WikiProject Women Scientists, which was profiled by ''Smithsonian Magazine, Smithsonian'' for its efforts to improve coverage of women scientists which the profile noted had "helped increase the number of female scientists on Wikipedia from around 1,600 to over 5,000". On Wikipedia Some Wikipedia WikiProjects are substantial enough to engage in cooperative activities with outside organization ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bristol Aquila
The Aquila was a nine-cylinder single-row radial aircraft engine designed by the Bristol Engine Company starting in 1934. A sleeve valve engine, its basic design was developed from the Bristol Perseus. The Aquila was never used in production, but further developments led to the Bristol Hercules, Bristol Taurus, and Bristol Centaurus. Design and development The Aquila was developed two years after the somewhat larger Perseus, both being sleeve valve designs. The primary difference was in size, the Perseus being based on the cylinder used in the Mercury engine, while the Aquila used a new and smaller sized cylinder. The result was a reduction in displacement from 1520 to 950 cubic inches (24.9 to 15.6 L). The first Aquila engine delivered a modest , which was unspectacular for an engine of this size. It soon developed into more powerful versions as improvements were worked into the line (as well as similar changes to the Perseus), and by 1936 it had improved to . This woul ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gloster Goring
The Gloster Goring was a single-engined two-seat biplane designed to meet 1926 Air Ministry specifications for a day/torpedo bomber. It was not put into production and the one aircraft built served later as an engine testbed. Development Early in 1926 the Air Ministry issued two specifications, 23/25 for a two-seat day bomber, torpedo bomber and reconnaissance aircraft, followed by 24/25 for a high-altitude bomber. These two specifications brought out prototypes from several makers: the Blackburn Beagle, Handley Page Hare, Hawker Harrier, Vickers Vildebeest and Westland Witch. The Goring was Gloster's submission, aimed, like most of the other machines at both specifications. The Goring''Flight'' 24 May 1928 was a single bay biplane with staggered wings of unequal span and slight sweep. They were based on spruce spars with internal wire bracing. The lower wing was angled downwards briefly as it left the fuselage, enabling a shorter-than-usual undercarriage. Short struts ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
De Havilland Flamingo
The de Havilland DH.95 Flamingo was a British twin-engined high-wing monoplane airliner first flown on 22 December 1938. During the Second World War some were used by the Royal Air Force (RAF) as a transport and general communications duties. Design and development The Flamingo was a twin-engined civil airliner developed by de Havilland, led by their newly appointed chief designer R. E. Bishop, and was the first all-metal stressed-skin aircraft built by the company; only the control surfaces were fabric covered. It was powered by two 890 hp Bristol Perseus air-cooled radial engines driving three-bladed de Havilland Propellers 'Hydromatic' variable-pitch propellers. Two pilots were seated side by side with a radio operator behind them in the cockpit, with the cabin accommodating 12–17 passengers. It had a retractable undercarriage, slotted flaps, and was considered a highly promising sales prospect for the company, capable of competing with the American Dougla ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Burnelli UB-14
The Burnelli UB-14, also known as the Cunliffe-Owen Clyde Clipper, was a 1930s American prototype lifting-fuselage airliner designed and built by Vincent Burnelli. Design and development Following on from his earlier designs Vincent Burnelli designed a commercial transport version using the lifting-fuselage concept. Burnelli's designs were based on the idea that an airfoil-section fuselage would contribute to the lift generated. The Burnelli UB-14 first flew in 1934, the airfoil-section fuselage was the centre-section of the wing. The aircraft had twin tailbooms and a widespan tailplane and elevator fitted with twin fins and rudders. The UB-14 had retractable landing gear and was powered by two Pratt & Whitney radial engines. An enclosed cockpit for the crew of two was located on the centre wing's upper surface. The cabin held 14 to 18 passengers. Operational history The first prototype, UB-14, was destroyed in a 1935 accident attributed to faulty maintenance on the aileron c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bristol Type 148
The Bristol Type 148 was a two-seat, single-engine low-wing monoplane built in 1937 to an Air Ministry specification for an army cooperation aircraft. It lost in the competition to the Westland Lysander and did not progress past the two prototypes that were built. Development The Bristol 148 was built by Bristol to an Air Ministry order for two prototypes of an army cooperation aircraft meeting Air Ministry specification A.39/34. The successful aircraft was to replace the Hawker Audax and Hector in a wide range of tasks. By 1935 Bristol had gained experience in the design of cantilever low-wing monoplanes powered by radial engines with the Types 133 and 146, and the Type 148 followed this layout, but had seating for two. The stressed-skin wings were of constant chord with rounded tips, and the fuselage was entirely of monocoque construction. The horizontal tail was set at the top of the fuselage and carried horn-balanced elevators; the rudder was large and pointed. All fly ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bristol Bulldog
The Bristol Bulldog is a British Royal Air Force single-seat biplane fighter designed during the 1920s by the Bristol Aeroplane Company. More than 400 Bulldogs were produced for the RAF and overseas customers, and it was one of the most famous aircraft used by the RAF during the inter-war period. Background The design of the Bulldog was the outcome of a series of design studies for fighters undertaken by Frank Barnwell during the 1920s. In 1924 Barnwell had started work on a fighter powered by the Rolls-Royce Falcon to meet the requirements of specification F.17/24. The project was shelved since Bristol preferred to use its own engine designs, but was revived in 1926 when Barnwell started work on a design, designated the Bristol 102, to meet either F.9/26 for a day-and-night fighter or N.21/26 for a shipborne fighter. The Type 105 designation was first applied to a subsequent proposal for another aircraft to meet F.9/26 powered by the Mercury engine then under develo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bristol Centaurus
The Centaurus was the final development of the Bristol Engine Company's series of sleeve valve radial aircraft engines. The Centaurus is an 18-cylinder, two-row design that eventually delivered over . The engine was introduced into service late in the Second World War and was one of the most powerful aircraft piston engines to see service. Design and development Like other Bristol sleeve valve engines, the Centaurus was based on the design knowledge acquired from an earlier design, in this case the Bristol Perseus cylinder. The Centaurus used 18 Perseus cylinders. The same cylinder was in use in the contemporary 14-cylinder Hercules, which was being brought into production when the design of the Centaurus started. The Centaurus had a cylinder swept volume of , nearly as much as the American Wright R-3350 ''Duplex-Cyclone'' large radial, making the Centaurus one of the largest aircraft piston engines to enter production, while that of the Hercules was . The nearly 40 p ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bomber
A bomber is a military combat aircraft designed to attack ground and naval targets by dropping air-to-ground weaponry (such as bombs), launching torpedoes, or deploying air-launched cruise missiles. The first use of bombs dropped from an aircraft occurred in the Italo-Turkish War, with the first major deployments coming in the First World War and Second World War by all major airforces causing devastating damage to cities, towns, and rural areas. The first purpose built bombers were the Italian Caproni Ca 30 and British Bristol T.B.8, both of 1913. Some bombers were decorated with nose art or victory markings. There are two major classifications of bomber: strategic and tactical. Strategic bombing is done by heavy bombers primarily designed for long-range bombing missions against strategic targets to diminish the enemy's ability to wage war by limiting access to resources through crippling infrastructure or reducing industrial output. Tactical bombing is aimed at coun ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Blackburn Roc
The Blackburn Roc (company designation B-25) was a naval fighter aircraft designed and produced by the British aviation company Blackburn Aircraft. It took its name from the mythical bird of the tales of the Arabian Nights, the Roc. It was operated by the Fleet Air Arm (FAA) and was active during the Second World War. The Roc was designed to Air Ministry Specification O.30/35 and was derived from the Blackburn Skua dive-bomber/fighter and developed in parallel to it. Unlike the Skua, the Roc had its armament in a turret. A large proportion of the work was subcontracted to another aircraft manufacturer, Boulton Paul, which had also designed their own turret fighter, the Boulton Paul Defiant. On 23 December 1938, the prototype Roc performed its maiden flight. Testing soon revealed it to have a relatively low maximum speed of only . The float plane version of the Roc was even slower, leading to the cancellation of plans to equip float plane squadrons with the type. Cancellation ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Blackburn Botha
The Blackburn B.26 Botha was a four-seat reconnaissance and torpedo bomber. It was produced by the British aviation company Blackburn Aircraft at its factories at Brough and Dumbarton. The Botha was developed during the mid 1930s in response to Air Ministry Specification M.15/35, and was ordered straight off the drawing board alongside the competing Bristol Beaufort. On 28 December 1938, the first production aircraft made the type's maiden flight; almost exactly one year later, it enter service with the RAF. During official evaluation testing of the Botha, stability issues were revealed, as well as the fact that it was underpowered. It was only briefly used in frontline operations before being withdrawn to secondary roles during 1941. It continued to be flown in secondary roles, largely being used for training and as a target tug, before the Botha was fully withdrawn during September 1944. Development During September 1935, the British Air Ministry issued specification M.15 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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