XV426 (32195090654)
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XV426 (32195090654)
The Lockheed XV-4 Hummingbird (originally designated VZ-10) was a United States Army, U.S. Army project to demonstrate the feasibility of using VTOL for a surveillance aircraft carrying target-acquisition and sensory equipment.Hummingbird A Promising Augmented-Jet VTOL Aircraft
''Flight International'', 3 April 1962
It was designed and built by the Lockheed Corporation in the 1960s, one of many attempts to produce a V/STOL vertical take off/landing jet. Both prototype aircraft were destroyed in accidents.


Design and development

Vertical take-off lift was obtained by exhausting the engine flow downward through multiple nozzles, augmented by a secondary flow of cold air. But the performance was far below estimates with only a 1.04 ...
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Lockheed Corporation
The Lockheed Corporation was an American aerospace manufacturer. Lockheed was founded in 1926 and merged in 1995 with Martin Marietta to form Lockheed Martin. Its founder, Allan Lockheed, had earlier founded the similarly named but otherwise-unrelated Loughead Aircraft Manufacturing Company, which was operational from 1912 to 1920. History Origins Allan Loughead and his brother Malcolm Loughead had operated an earlier aircraft company, Loughead Aircraft Manufacturing Company, which was operational from 1912 to 1920. The company built and operated aircraft for paying passengers on sightseeing tours in California and had developed a prototype for the civil market, but folded in 1920 due to the flood of surplus aircraft deflating the market after World War I. Allan went into the real estate market while Malcolm had meanwhile formed a successful company marketing brake systems for automobiles. On December 13, 1926, Allan Loughead, Jack Northrop, John Northrop, Kenneth Kay and Fre ...
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Ejection Seat
In aircraft, an ejection seat or ejector seat is a system designed to rescue the aircraft pilot, pilot or other aircrew, crew of an aircraft (usually military) in an emergency. In most designs, the seat is propelled out of the aircraft by an explosive charge or rocket motor, carrying the pilot with it. The concept of an ejectable escape crew capsule has also been tried (see B-58 Hustler). Once clear of the aircraft, the ejection seat deploys a parachute. Ejection seats are common on certain types of military aircraft. History A bungee cord, bungee-assisted escape from an aircraft took place in 1910. In 1916, Everard Calthrop, an early inventor of parachutes, patented an ejector seat using compressed air. Compression springs installed under the seat were tested. The modern layout for an ejection seat was first introduced by Romanian inventor Anastase Dragomir in the late 1920s. The design featured a ''parachuted cell'' (a dischargeable chair from an aircraft or other vehicle) ...
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Cancelled Military Aircraft Projects Of The United States
Cancel, cancellation, or cancelled may refer to: Business *Project cancellation, in government and industry *Cancellation (mail), a postal marking applied to a stamp or stationery indicating the item has been used *Cancellation (insurance), the termination of an insurance policy *Flight cancellation and delay, not operating a scheduled flight Sociology *Cancel culture, boycotting and ostracism calling out offensive behavior on social media or in real life Technology and science *Cancel leaf, a bibliographic term for replaced leaves in printed books *Cancellation property, the mathematical property if ''a''×''b'' = ''a''×''c'' then ''b'' = ''c'' ** Cancelling out, a technique for simplifying mathematical expressions *Catastrophic cancellation, numerical error arising from subtracting approximations to nearby numbers * Noise cancellation, a method for reducing unwanted sound *Phase cancellation, the effect of two waves that are out of phase with each other being summed *Ca ...
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Lift Jet
A lift jet is a lightweight jet engine installed only for upward thrust.{{cite book , url=https://archive.org/details/cambridgeaerospa0000guns/page/346/mode/2up , isbn=978-0-521-84140-5 , title=The Cambridge aerospace dictionary , date=2004 , last1=Gunston , first1=Bill , publisher=Cambridge University Press An early experimental program using lift engines was the Rolls-Royce Thrust Measuring Rig (TMR), nicknamed the "Flying Bedstead", first run in 1955. In the early 1960s both the Soviet Union and Western nations considered lift engines to provide STOL or even VTOL capability to combat aircraft. The Soviet Union did concurrent testing of versions of combat aircraft using swing-wing, variable geometry wings or lift jets but ruled out lift jets. Problems associated with lift engines include high fuel consumption, extra weight (which is simply dead weight when the engines are not needed for lift), and taking up fuselage volume that could be used for fuel or other systems. I ...
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Aircraft With Auxiliary Jet Engines
An aircraft ( 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 the dynamic lift of an airfoil, or, in a few cases, direct downward thrust from its engines. Common examples of aircraft include airplanes, rotorcraft (including helicopters), airships (including blimps), gliders, paramotors, and hot air balloons. Part 1 (Definitions and Abbreviations) of Subchapter A of Chapter I of Title 14 of the U. S. Code of Federal Regulations states that aircraft "means a device that is used or intended to be used for flight in the air." 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, whereas unmanned aerial vehicles may be remotely controlled or self-controlled by onboard computers. Aircraft may be classified by different criteria, such as ...
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1960s United States Experimental Aircraft
Year 196 ( CXCVI) was a leap year starting on Thursday of the Julian calendar. At the time, it was known as the Year of the Consulship of Dexter and Messalla (or, less frequently, year 949 ''Ab urbe condita''). The denomination 196 for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years. Events By place Roman Empire * Emperor Septimius Severus attempts to assassinate Clodius Albinus but fails, causing Albinus to retaliate militarily. * Emperor Septimius Severus captures and sacks Byzantium; the city is rebuilt and regains its previous prosperity. * In order to assure the support of the Roman legion in Germany on his march to Rome, Clodius Albinus is declared Augustus by his army while crossing Gaul. * Hadrian's wall in Britain is partially destroyed. China * First year of the Jian'an Era, during the reign of the Xian Emperor of the Han. * The Xian Emperor returns to war-r ...
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Lockheed Aircraft
Lockheed (originally spelled Loughead) may refer to: Brands and enterprises * Lockheed Corporation, a former American aircraft manufacturer * Lockheed Martin, formed in 1995 by the merger of Lockheed Corporation and Martin Marietta ** Lockheed Martin Aeronautics ** Lockheed Martin Space Systems * Lockheed Shipbuilding and Construction Company People * Flora Haines Loughead (1855-1943), American writer, farmer, miner * The brothers who founded the original Lockheed Corporation: ** Allan Loughead (1889–1969), American aviation pioneer ** Malcolm Loughead, American aviation pioneer Other uses * Lockheed (comics) Lockheed is a fictional character appearing in American comic books published by Marvel Comics. The character appears most commonly in association with the X-Men. He is an Extraterrestrial life, alien dragon and the longtime companion of Kitty Pry ..., a Marvel Comics character * Lockheed Martin Transit Center, in Sunnyvale, California See also * Lochhead, a surna ...
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List Of VTOL Aircraft
This is a list of fixed-wing aircraft capable of vertical take-off and landing arranged under manufacturer. The list excludes helicopters, including compound helicopters and gyrocopters, because they are assumed to have this capability. For more detail on subtypes of VTOL, see List of tiltrotor aircraft. A * AeroVironment SkyTote (tailsitter) * AgustaWestland AW609 (tiltrotor) * Armstrong Whitworth AW.171 (ducted fan) * Avro Canada VZ-9 Avrocar (ducted fan) B * BAE Harrier II (vectored thrust) * BAE Sea Harrier (vectored thrust) * Bell 65 ATV ( Tiltjet) * Bell/Agusta BA609 (tiltrotor), presently known as AgustaWestland AW609 * Bell Boeing Quad TiltRotor (proposal) * Bell Boeing V-22 Osprey (tiltrotor) * Bell Eagle Eye (tiltrotor UAV) * Bell V-280 Valor (tiltrotor) * Bell X-14 (vectored thrust) * Bell X-22 (ducted fan) * Bell XV-3 (first tiltrotor) * Bell XV-15 (tiltrotor) * Bensen B-10 (ducted fan) * Boeing/McDonnell Douglas AV-8 Harrier (vectored thrust) * Bo ...
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List Of Lockheed Aircraft
This is a list of aircraft produced or proposed by the Lockheed Aircraft Corporation from its founding as the Lockheed Aircraft Company in 1926 to its merging with Martin Marietta to form the Lockheed Martin Corporation in 1995. Ordered by model number, Lockheed gave most of its aircraft astronomical names, from the first Vega to the C-5 Galaxy. Aircraft models listed in italics and with higher numbers – ''780'' following 80 and preceding 81, for example – are variants or developments of the base model. Unmanned Aerial Vehicles * Lockheed Aequare * Lockheed AQM-60 Kingfisher * Lockheed MQM-105 Aquila * Lockheed D-21 * Lockheed X-7 See also * Vega Aircraft Corporation * Lockheed Constellation variants The Lockheed Constellation was an American civil airliner and military transport built in the 1940s and 1950s; this is a list of its variants. The aircraft was used for many roles, including one variant Columbine II becoming the first Air Force O ... References ...
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List Of Military Aircraft Of The United States
Lists of military aircraft of the United States cover current and former military aircraft of the United States Armed Forces. By designation * List of United States Air Force aircraft designations (1919–1962) *List of United States Navy aircraft designations (pre-1962) * List of United States Army aircraft designations (1956–1962) * List of United States Tri-Service aircraft designations * List of U.S. DoD aircraft designations * List of undesignated military aircraft of the United States Other lists * List of United States bomber aircraft * List of United States military helicopters * List of United States fighter aircraft * List of United States attack aircraft * List of active United States Air Force aircraft *List of active United States military aircraft * List of active United States naval aircraft * List of aircraft of the United States during World War II * List of future military aircraft of the United States * UAVs in the U.S. military * List of U.S. military equipmen ...
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Ryan XV-5 Vertifan
The Ryan XV-5 Vertifan was a jet-powered V/STOL experimental aircraft in the 1960s. The United States Army (US Army) commissioned the Ryan VZ-11-RY (re-designated XV-5A in 1962) in 1961, along with the Lockheed VZ-10 Hummingbird (re-designated XV-4 in 1962). It successfully proved the concept of ducted lift fans, but the project was cancelled after multiple fatal crashes unrelated to the lift system. Design The XV-5 was powered by two thrust General Electric J85-GE-5 turbojets. General Electric X353-5 Lift-fans in the wings and a smaller fan in the nose, powered by engine exhaust gas, were used for Vertical Take-Off and Landing (VTOL). The diameter lift fan in each wing had a hinged cover on the upper wing surface which was opened for VTOL. The nose fan provided adequate pitch control but produced adverse handling characteristics."Lift-Fan Aircraft-Lessons Learned The Pilot's Perspective" Ronald M. Gerdes, NASA Contractor Report 177620August 1993 The fans provided vertica ...
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