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Circular Wing
A circular wing is a disc-shaped wing having the outer planform of a circle. If the aircraft has no fuselage or tail the disc-shaped craft is sometimes described as a ''flying saucer''. If the entire disc rotates it is called a ''disc wing''. Disc-shaped aircraft development dates back to before World War II. A number of disc-shaped aircraft have been proposed over the years, and a few have been built. Circular wing aircraft Nemeth Umbrella Plane In 1934, at Miami University (of Ohio), an aircraft called the Nemeth Umbrella Plane (aka Roundwing) was tested. (''Nemeth'' is sometimes spelled ''Nuneth''.) This aircraft had a parasol wing of circular form above a conventional fuselage and tail, and it was powered by propeller in a tractor configuration. Sack AS.6 During World War II, a number of disc-shaped aircraft were proposed by aircraft designers in Germany. One of the few to make it further than the drawing board was the Sack AS-6, an experimental light plane with a round-win ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aircraft
An aircraft is a vehicle that is able to fly by gaining support from the air. It counters the force of gravity by using either static lift or by using the dynamic lift of an airfoil, or in a few cases the downward thrust from jet engines. Common examples of aircraft include airplanes, helicopters, airships (including blimps), gliders, paramotors, and hot air balloons. The human activity that surrounds aircraft is called ''aviation''. The science of aviation, including designing and building aircraft, is called '' aeronautics.'' Crewed aircraft are flown by an onboard pilot, but unmanned aerial vehicles may be remotely controlled or self-controlled by onboard computers. Aircraft may be classified by different criteria, such as lift type, aircraft propulsion, usage and others. History Flying model craft and stories of manned flight go back many centuries; however, the first manned ascent — and safe descent — in modern times took place by larger hot-air ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jet Engine
A jet engine is a type of reaction engine discharging a fast-moving jet of heated gas (usually air) that generates thrust by jet propulsion. While this broad definition can include rocket, Pump-jet, water jet, and hybrid propulsion, the term typically refers to an internal combustion airbreathing jet engine such as a turbojet, turbofan, ramjet, or pulse jet engine, pulse jet. In general, jet engines are internal combustion engines. Airbreathing jet engines typically feature a Axial compressor, rotating air compressor powered by a turbine, with the leftover power providing thrust through the propelling nozzle—this process is known as the Brayton cycle, Brayton thermodynamic cycle. Jet aircraft use such engines for long-distance travel. Early jet aircraft used turbojet engines that were relatively inefficient for subsonic flight. Most modern subsonic jet aircraft use more complex High-bypass turbofan, high-bypass turbofan engines. They give higher speed and greater fuel eff ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Moller M200X
The M200G Neuera is a prototype of a flying saucer-style hovercraft, designed by aeronautics engineer Paul Moller. The vehicle is envisioned as a precursor to the Moller M400 Skycar. The M200G Volantor uses a system of eight computer-controlled fans to hover up to above the ground. Volantor is a term coined by Moller meaning "a vertical takeoff and landing aircraft." Design The M200 is a design for a VTOL personal air vehicle, a class of vehicle described by Moller as a "volantor". The M200G Neuera is a circular craft with seats in the middle for two passengers and a control panel. The vehicle is 3 feet (0.9 meters) tall and 10 feet (3 meters) in diameter. Eight Wankel rotary engines power eight enclosed fans. The fans allow for vertical take-off and landing and, once the vehicle is aloft, rely upon the ground effect to create a cushion of air that the vehicle sits upon while flying. The eight separate engines exist for redundancy, allowing the craft to co ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lenticular Reentry Vehicle
The Lenticular Reentry Vehicle (LRV), according to a November 2000 ''Popular Mechanics'' cover story, was an experimental nuclear warhead delivery system under development during the Cold War by defense contractor North American Aviation, managed out of Wright-Patterson Air Force Base in Dayton, Ohio. The project was classified as secret in 1962 and cleared for public release December 28, 1999.Oberto, R. J. (1962, October). Environmental control systems selection for manned space vehicles. Volume II, Appendix I, missions, vehicles, equipment. (AD333266). Its declassified technical report had been compiled by R. J. Oberto, Los Angeles Division of North American Aviation. His report described the LRV as an offensive weapons system. ''Popular Mechanics'' obtained information on the LRV from a Freedom of Information Act request after documents describing the project were declassified in 1999. Related research commenced during the late 1950s. The Convair/Pomona division of Gene ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pye Wacket
Pye Wacket was the codename for an experimental Lens (geometry), lenticular-form air-to-air missile developed by the Convair Division of the General Dynamics Corporation in 1957. Intended as a defensive missile for the B-70 Valkyrie Mach 3 bomber, the program saw extensive wind-tunnel testing and seemed promising; however, the cancellation of the B-70 removed the requirement for the missile, and the project was cancelled. Genesis Project "Pye Wacket", officially known as the Lenticular Defense Missile (LDM) Program and by the project number WS-740A, was instituted in 1958 in response to a US Air Force request for a Defensive Anti-Missile System (DAMS) to protect the proposed B-70 Valkyrie strategic bomber from high-speed, high-altitude surface-to-air missiles (SAMs) and interceptor aircraft.Parsch 2005 The extreme speed and operating altitude of the Valkyrie was considered sufficient protection against Soviet interceptors of the time. However it was anticipated that future aircr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hovercraft
A hovercraft, also known as an air-cushion vehicle or ACV, is an amphibious Craft (vehicle), craft capable of travelling over land, water, mud, ice, and other surfaces. Hovercraft use blowers to produce a large volume of air below the hull, or air cushion, that is slightly above atmospheric pressure. The pressure difference between the higher pressure air below the hull and lower pressure ambient air above it produces lift, which causes the hull to float above the running surface. For stability reasons, the air is typically blown through slots or holes around the outside of a disk- or oval-shaped platform, giving most hovercraft a characteristic rounded-rectangle shape. The first practical design for hovercraft was derived from a British invention in the 1950s. They are now used throughout the world as specialised transports in disaster relief, coastguard, military and survey applications, as well as for sport or passenger service. Very large versions have been used to t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
VZ-9 AV Avrocar
The Avro Canada VZ-9 Avrocar was a VTOL aircraft developed by Avro Canada as part of a secret U.S. military project carried out in the early years of the Cold War. The Avrocar intended to exploit the Coandă effect to provide lift and thrust from a single "turborotor" blowing exhaust out of the rim of the disk-shaped aircraft. In the air, it would have resembled a flying saucer. Originally designed as a fighter-like aircraft capable of very high speeds and altitudes, the project was repeatedly scaled back over time and the U.S. Air Force eventually abandoned it. Development was then taken up by the U.S. Army for a tactical combat aircraft requirement, a sort of high-performance helicopter.Milberry 1979, p. 137. In flight testing, the Avrocar proved to have unresolved thrust and stability problems that limited it to a degraded, low-performance flight envelope; subsequently, the project was cancelled in September 1961. Through the history of the program, the project was referr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
United States Army
The United States Army (USA) is the land service branch of the United States Armed Forces. It is one of the eight U.S. uniformed services, and is designated as the Army of the United States in the U.S. Constitution.Article II, section 2, clause 1 of the United States Constitution (1789). See alsTitle 10, Subtitle B, Chapter 301, Section 3001 The oldest and most senior branch of the U.S. military in order of precedence, the modern U.S. Army has its roots in the Continental Army, which was formed 14 June 1775 to fight the American Revolutionary War (1775–1783)—before the United States was established as a country. After the Revolutionary War, the Congress of the Confederation created the United States Army on 3 June 1784 to replace the disbanded Continental Army.Library of CongressJournals of the Continental Congress, Volume 27/ref> The United States Army considers itself to be a continuation of the Continental Army, and thus considers its institutional inception to be th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Coandă Effect
The Coandă effect ( or ) is the tendency of a fluid jet to stay attached to a convex surface. ''Merriam-Webster'' describes it as "the tendency of a jet of fluid emerging from an orifice to follow an adjacent flat or curved surface and to entrain fluid from the surroundings so that a region of lower pressure develops." It is named after Romanian inventor Henri Coandă, who was the first to recognize the practical application of the phenomenon in aircraft design around 1910. It was first documented explicitly in two patents issued in 1936. Discovery An early description of this phenomenon was provided by Thomas Young in a lecture given to The Royal Society in 1800: A hundred years later, Henri Coandă identified an application of the effect during experiments with his Coandă-1910 aircraft, which mounted an unusual engine he designed. The motor-driven turbine pushed hot air rearward, and Coandă noticed that the airflow was attracted to nearby surfaces. In 1934 Coandă obt ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
John Carver Meadows Frost
John Carver Meadows Frost (1915 in Walton-on-Thames, England – 9 October 1979 in Auckland, New Zealand) was a British aircraft designer. His primary contributions centred on pioneering supersonic British experimental aircraft and as the chief designer who shepherded Canada's first jet fighter project, the Avro Canada CF-100, to completion. He was also the major force behind the Avro Canada VTOL aircraft projects, particularly as the unheralded creator of the Avro Canada flying saucer projects. Early life Frost's introduction to aviation had begun when he was a teenager. At school in the early 1930s his Latin teacher A. Maitland Emmet had taken him up in a Bristol Fighter. John Frost had been born in Walton-on-Thames near London in 1915 and had shown an early interest in the sciences at St Edward's School, Oxford, where he graduated with honours in mathematics, chemistry and physics. Aviation career First designs Frost began his aeronautical career in the 1930s as an app ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Avro Canada
Avro Canada was a Canadian aircraft manufacturing company. It was founded in 1945 as an aircraft plant and within 13 years became the third-largest company in Canada, one of the largest 100 companies in the world, and directly employing over 50,000. Avro Canada was best known for the CF-105 Arrow, but through growth and acquisition, it rapidly became a major, integrated company that had diverse holdings. Following the cancellation of the CF-105 Arrow the company ceased operations in 1962. A.V. Roe Canada Origins During World War II, Victory Aircraft in Malton, Ontario, was Canada's largest aircraft manufacturer. Prior to 1939, as a part of National Steel Car of Hamilton, the concern had been one of a number of "shadow factories" set up in Canada to produce British aircraft designs in safety. National Steel Car had produced Avro Anson trainers, Handley Page Hampden bombers, Hawker Hurricane fighters and Westland Lysander army cooperation aircraft. National Steel Car Corporatio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Avrocar Flying
The Avro Canada VZ-9 Avrocar was a VTOL aircraft developed by Avro Canada as part of a secret U.S. military project carried out in the early years of the Cold War. The Avrocar intended to exploit the Coandă effect to provide lift and thrust from a single "turborotor" blowing exhaust out of the rim of the disk-shaped aircraft. In the air, it would have resembled a flying saucer. Originally designed as a fighter aircraft, fighter-like aircraft capable of very high speeds and altitudes, the project was repeatedly scaled back over time and the U.S. Air Force eventually abandoned it. Development was then taken up by the U.S. Army for a tactical combat aircraft requirement, a sort of high-performance helicopter.Milberry 1979, p. 137. In flight testing, the Avrocar proved to have unresolved thrust and stability problems that limited it to a degraded, low-performance flight envelope; subsequently, the project was cancelled in September 1961. Through the history of the program, the p ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
_15_February_1961.jpg "Click for more on -> Pye Wacket")
