A ramjet is an airbreathing jet engine that uses the engine's forward motion to compress incoming air.
Ramjet may also refer to:
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A ramjet, sometimes referred to as a flying stovepipe or an athodyd, is a form of airbreathing jet engine that uses the engine's forward motion to compress incoming air without an axial compressor or a centrifugal compressor. Because ramjets cannot produce thrust at zero airspeed, they cannot move an aircraft from a standstill. A ramjet-powered vehicle, therefore, requires an assisted take-off like a rocket assist to accelerate it to a speed where it begins to produce thrust. Ramjets work most efficiently at supersonic speeds around Mach 3. This type of engine can operate up to speeds of Mach 6.
The Bussard ramjet is a theoretical method of spacecraft propulsion proposed in 1960 by the physicist Robert W. Bussard, popularized by Poul Anderson's novel Tau Zero, Larry Niven in his Known Space series of books, Vernor Vinge in his Zones of Thought series, and referred to by Carl Sagan in the television series and book Cosmos.
Project Pluto was a United States government program to develop nuclear-powered ramjet engines for use in cruise missiles. Two experimental engines were tested at the United States Department of Energy Nevada Test Site (NTS) in 1961 and 1964.
Air-augmented rockets use the supersonic exhaust of some kind of rocket engine to further compress air collected by ram effect during flight to use as additional working mass, leading to greater effective thrust for any given amount of fuel than either the rocket or a ramjet alone.
A scramjet is a variant of a ramjet airbreathing jet engine in which combustion takes place in supersonic airflow. As in ramjets, a scramjet relies on high vehicle speed to compress the incoming air forcefully before combustion, but whereas a ramjet decelerates the air to subsonic velocities before combustion, the airflow in a scramjet is supersonic throughout the entire engine. That allows the scramjet to operate efficiently at extremely high speeds.
The Republic XF-103 was an American project to develop a powerful missile-armed interceptor aircraft capable of destroying Soviet bombers while flying at speeds as high as Mach 3. Despite a prolonged development, it never progressed past the mockup stage.
The Nord 1500 Griffon was an experimental ramjet-powered interceptor aircraft designed and built by French state-owned aircraft manufacturer Nord Aviation.
The Bristol Thor, latterly Bristol Siddeley BS.1009 Thor, was a 16-inch diameter ramjet engine developed by Bristol Aero Engines for the Bristol Bloodhound anti-aircraft missile.
The Burya was a supersonic, intercontinental cruise missile, developed by the Lavochkin design bureau under designation La-350 from 1954 until the program cancellation in February 1960. The request for proposal issued by the Soviet government in 1954, called for a cruise missile capable of delivering a nuclear payload to the United States. Analogous developments in the United States were the SM-62 Snark and SM-64 Navaho cruise missiles, particularly the latter, which used parallel technology and had similar performance goals.
The Transformers: Spotlight is a comic book series of one-shot issues, published by IDW Publishing.
Fun Factory was a children's programme on the satellite television channel Sky Channel that ran from 1985 to 1994. It continued as a programming block without a host up until 1994.
New Avengers/Transformers is an intercompany crossover comic book series published by Marvel Comics and IDW Publishing that involves the pre-Civil War New Avengers and the Transformers. It is set in the fictional nation of Latveria, and involves the characters Captain America, Spider-Man, Iron Man, Luke Cage, Wolverine, Falcon and Ms. Marvel from the Avengers, and Prowl, Ratchet, Jazz, Bumblebee and Optimus Prime from the Autobots. It was written by Stuart Moore, penciled by Tyler Kirkham and premiered on July 5, 2007. The tag line for the series is "Assemble and Roll Out!"
The Bristol Odin is a ramjet engine originally developed by Bristol Siddeley Engines, later taken over by Rolls-Royce.
The air turborocket is a form of combined-cycle jet engine. The basic layout includes a gas generator, which produces high pressure gas, that drives a turbine/compressor assembly which compresses atmospheric air into a combustion chamber. This mixture is then combusted before leaving the device through a nozzle and creating thrust.
The Focke-Wulf Ta 283 was a German swept wing, ramjet-powered interceptor aircraft proposal during World War II. The project was proposed at the same time as the Focke-Wulf Super Lorin and remained only a design study until the surrender of Nazi Germany.
An airbreathing jet engine is a jet engine that emits a jet of hot exhaust gases formed from air that is forced into the engine by several stages of centrifugal, axial or ram compression, which is then heated and expanded through a nozzle. They are typically gas turbine engines. The majority of the mass flow through an airbreathing jet engine is provided by air taken from outside of the engine and heated internally, using energy stored in the form of fuel.
The Creative Research On Weapons or Crow program was an experimental missile project developed by the United States Navy's Naval Air Missile Test Center during the late 1950s. Intended to evaluate the solid-fueled integral rocket/ramjet (SFIRR) method of propulsion as well as solid-fueled ramjet engines, flight tests were conducted during the early 1960s with mixed success.
Transformers: Retribution is a science fiction adventure novel by David J. Williams and Mark S. Williams. It is final installment of the History of the War for Cybertron trilogy, consisting of Transformers: Exodus, and Transformers: Exiles, and exists in the same continuity as Transformers: Prime and Transformers: War for Cybertron. It differs in some respects from the previous installments in the trilogy, mostly in bringing the series closer to matching the established lore of Transformers: Prime.
The Lockheed Martin SR-72, colloquially referred to as "Son of Blackbird", is an American hypersonic UAV concept intended for intelligence, surveillance and reconnaissance proposed privately in 2013 by Lockheed Martin as a successor to the retired Lockheed SR-71 Blackbird. The company expected an SR-72 test vehicle could fly by 2023.
The PL-21 (PL-XX) is an active radar-guided long range beyond-visual-range air-to-air missile developed by the People's Republic of China. It is considered comparable to the American AIM-120 AMRAAM, DARPA's Triple Threat Terminator (T3), Europe's MBDA's Meteor and the Russian R-37 (missile).