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Cirrus-Hermes Engineering Company
The Cirrus and Hermes or Cirrus-Hermes are a series of British aero engines manufactured, under various changes of ownership, from the 1920s until the 1950s. The engines were all air-cooled, four-cylinder inline types, with earlier ones upright and later designs inverted. The first Cirrus design was created for the planned de Havilland Moth light aeroplane and, when it appeared in 1925, created the market for private flying. It and its successors were widely used for private and light aircraft from that moment on. Design and development ADC The Cirrus engine originated in Geoffrey de Havilland's 1924 quest for a powerplant suited to a light two-seat sports biplane which would become the de Havilland Moth. No suitable engine, combining a suitable power output with light weight, low cost and high reliability existed at the time. The Aircraft Disposal Company (also known as Airdisco and ADC) were producing the low-cost Airdisco V8 which had been developed by Frank Halford from the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
De Havilland Moth
The de Havilland Moths were a series of light aircraft, sports planes, and military trainers designed by Geoffrey de Havilland. In the late 1920s and 1930s, they were the most common civilian aircraft flying in Britain, and during that time every light aircraft flying in the UK was commonly referred to as a Moth, regardless if it was de Havilland-built or not. Development and models The first Moth was the DH.60 - a straight-winged biplane two-seater. To enable storing the plane in small spaces, the DH.60's wings could fold backwards against the fuselage. "Like a moth" remarked Geoffrey de Havilland, an avid lepidopterist, so the plane was nicknamed Moth from the drawing board on. The Moth was one of the first practical light aircraft designs to be intended for civilian training and recreational use, rather than for military buyers. The Moth was also one of the first light aircraft to be mass produced, and was available to a much wider section of the general public than previo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Blackburn Cirrus Major
The Blackburn Cirrus Major is a British, inline-four aircraft engine which was developed in the late 1930s, but continued development and production into the 1940s and post war. Design and development The Blackburn Cirrus Major started life as a clean-sheet replacement for the original 1920s Cirrus and Hermes series of upright inline four-cylinder air cooled aircraft engines originally designed by Frank Halford for the early DH60 de Havilland Cirrus Moth and which had been in production by the Aircraft Disposal Company (ADC) and later Cirrus Aero Engine Limited, which itself evolved into the Cirrus-Hermes Engineering Company. C. S. Napier, son of engine designer Montague Napier, was Technical Director and Chief Designer for Cirrus-Hermes Engineering when he began work on two new engines, the Cirrus minor and the larger Cirrus Major. The engines were still under development when the company was bought by the Blackburn Aeroplane & Motor Company, moved to a new factory at Br ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Avro Baby
The Avro 534 Baby (originally named the "Popular") was a British single-seat light sporting biplane built shortly after the First World War. Development The Avro Baby was a single-bay biplane of conventional configuration with a wire-braced wooden structure covered in canvas. It had equal-span, unstaggered wings which each carried two pairs of ailerons. Initially, the aircraft was finless and had a rudder of almost circular shape. There were later variations of this. The main undercarriage was a single-axle arrangement and with a tailskid. The first Babies were powered by a water-cooled inline Green C.4 engine of pre-1914 design that had previously been installed in the Avro Type D, though thoroughly remodelled postwar by the Green Engine Co.Jackson 1990, p. 165. It produced 35 hp (26 kW). Most of the later Babies also used this engine design, new-built from original Green drawings by Peter Brotherhood, Peter Brotherhood Limited of Peterborough, though some variants u ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Avro Avian
The Avro Avian is a series of United Kingdom, British light aircraft designed and built by Avro in the 1920s and 1930s. While the various versions of the Avian were sound aircraft, they were comprehensively outsold by the de Havilland Moth and its descendants. American examples manufactured under license by the Whittesley Manufacturing Co. in Bridgeport, Connecticut are also known as the Whittesley Avian. Design and development The Avro 581 Avian prototype was designed and built to compete in the Lympne light aircraft trials at Lympne Airport, Lympne Aerodrome in September 1926. Its wooden fuselage was based on that of the Avro 576 autogyro, but it was fitted with conventional biplane wings and powered by a 70 hp (50 kW) Armstrong Siddeley Genet engine. It performed well at the trials, but was eliminated due to engine failure. In early 1927 it was re-engined with an Cirrus Engine, ADC Cirrus engine as the Type 581A and sold to Bert Hinkler. Production aircraft wer ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
ADC Cirrus
The ADC Cirrus is a series of British aero engines manufactured using surplus Renault parts by the Aircraft Disposal Company (ADC) in the 1920s. The engines were air-cooled, four-cylinder inline types. They were widely used for private and light aircraft. Design and development The Cirrus engine originated in Geoffrey de Havilland's 1924 search for a powerplant suitable for the light two-seat sports biplane which would become the de Havilland Moth. No engine existed at the time with a suitable level of power combined with a low weight. The Aircraft Disposal Company, also known as Airdisco and ADC, were producing the low-cost Airdisco V8 which had been developed by Frank Halford from their large stocks of war surplus Renault V8 aero engines. De Havilland realised that half of this engine would make an air-cooled four-cylinder inline engine of just the right size at low cost. He persuaded Halford to undertake its design and development. The cylinders, pistons, con-rods and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cirrus Hermes
The Cirrus and Hermes or Cirrus-Hermes are a series of British aero engines manufactured, under various changes of ownership, from the 1920s until the 1950s. The engines were all air-cooled, four-cylinder inline types, with earlier ones upright and later designs inverted. The first Cirrus design was created for the planned de Havilland Moth light aeroplane and, when it appeared in 1925, created the market for private flying. It and its successors were widely used for private and light aircraft from that moment on. Design and development ADC The Cirrus engine originated in Geoffrey de Havilland's 1924 quest for a powerplant suited to a light two-seat sports biplane which would become the de Havilland Moth. No suitable engine, combining a suitable power output with light weight, low cost and high reliability existed at the time. The Aircraft Disposal Company (also known as Airdisco and ADC) were producing the low-cost Airdisco V8 which had been developed by Frank Halford from their ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cirrus Engines
Cirrus may refer to: Science *Cirrus (biology), any of various thin, thread-like structures on the body of an animal *Cirrus (botany), a tendril * Infrared cirrus, in astronomy, filamentary structures seen in infrared light *Cirrus cloud, a type of cloud Aviation *Cirrus aero engines, a series of British aircraft engines manufactured by various companies from the 1920s to the 1950s *Cirrus Aircraft, an aircraft manufacturer in Duluth, Minnesota, USA *Cirrus Airlines, a defunct regional airline in Hallbergmoos, Germany * Cirrus (rocket), a German research rocket first launched in 1961 *Schempp-Hirth Cirrus, an Open-class sailplane *Schempp-Hirth Standard Cirrus, a Standard-class sailplane *Swing Cirrus, a German paraglider design Music * ''Cirrus'' (album), a 1974 release by Bobby Hutcherson *Cirrus (band), an American electronica duo * "Cirrus" (song), a 2013 instrumental by DJ Bonobo *"Cirrus", a 1996 song by Joe Morris from '' Elsewhere'' * "Cirrus Minor" (song), a 1969 song ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
General Aircraft Limited
General Aircraft Limited was a British aircraft manufacturer from its formation in 1931 to amalgamation with Blackburn Aircraft in 1949 to become Blackburn and General. Its main products were military gliders and light transport aircraft. History On 27 February 1931, General Aircraft Limited (GAL) was formed to undertake production of aircraft using the 'monospar' wing designs of the Monospar Wing Company Ltd. Both firms were headed by Helmut J. Stieger, the Swiss inventor of the technique. GAL produced about 28 examples of the Monospar series of twin-engined light transport aircraft at Croydon Aerodrome between 1932 and 1934. In October 1934, both companies were re-capitalised by investment group British Pacific Trust, and were re-formed in a new company also named General Aircraft Limited. Also included in the new company were the assets of National Flying Services Ltd, the owner of London Air Park in Hanworth near Feltham, plus adjoining industrial premises built in 1917 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Compression Ratio
The compression ratio is the ratio between the maximum and minimum volume during the compression stage of the power cycle in a piston or Wankel engine. A fundamental specification for such engines, it can be measured in two different ways. The simpler way is the static compression ratio: in a reciprocating engine, this is the ratio of the volume of the cylinder when the piston is at the bottom of its stroke to that volume when the piston is at the top of its stroke. The dynamic compression ratio is a more advanced calculation which also takes into account gases entering and exiting the cylinder during the compression phase. Effect and typical ratios A high compression ratio is desirable because it allows an engine to extract more mechanical energy from a given mass of air–fuel mixture due to its higher thermal efficiency. This occurs because internal combustion engines are heat engines, and higher compression ratios permit the same combustion temperature to be reached wit ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fuel Injection
Fuel injection is the introduction of fuel in an internal combustion engine, most commonly automotive engines, by the means of a fuel injector. This article focuses on fuel injection in reciprocating piston and Wankel rotary engines. All compression-ignition engines (e.g. diesel engines), and many spark-ignition engines (i.e. petrol (gasoline) engines, such as Otto or Wankel), use fuel injection of one kind or another. Mass-produced diesel engines for passenger cars (such as the Mercedes-Benz OM 138) became available in the late 1930s and early 1940s, being the first fuel-injected engines for passenger car use. In passenger car petrol engines, fuel injection was introduced in the early 1950s and gradually gained prevalence until it had largely replaced carburetors by the early 1990s. The primary difference between carburetion and fuel injection is that fuel injection atomizes the fuel through a small nozzle under high pressure, while carburetion relies on suction crea ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
