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Orange Nell
Orange Nell, a rainbow code name, was a 1950s design for a short-range surface-to-air missile (SAM) to defend Royal Navy ships against supersonic strike aircraft and anti-ship missiles. It could be mounted on any ship capable of carrying the QF 5.25-inch naval gun, whose turret would be replaced by a twin-rail missile launcher and 40-round magazine. Started in 1953, the system was intended to enter service some time later and offer performance against missile developments into the 1970s. During development a problem was raised that ultimately led to its cancelation. The issue involved the warhead of the target missile; as these were designed to penetrate armour, they were very robust. While Orange Nell could reliably destroy the missile itself, it was not clear that the warhead would be damaged. Given the close quarters engagements, the warhead might continue on to impact the ship anyway. In 1957 the decision was made to concentrate only on long-range interception, preventing the m ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rainbow Code
The Rainbow Codes were a series of code names used to disguise the nature of various British military research projects. They were mainly used by the Ministry of Supply from the end of the Second World War until 1958, when the ministry was broken up and its functions distributed among the forces. The codes were replaced by an alphanumeric code system. History During WWII, British intelligence was able to glean details of new German technologies simply by considering their code names. For instance, when they heard of a new system known as ''Wotan'', Reginald Victor Jones asked around and found that Wotan was a one-eyed god. Based on this, he guessed it was a radio navigation system using a single radio beam. This proved correct, and the Royal Air Force was able to quickly render it useless through jamming. Wishing to avoid making this sort of mistake, Ministry of Supply (MoS) initiated a system that would be entirely random and deliberately unrelated to the program in any way, w ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
KS-1 Komet
The Raduga KS-1 Komet (russian: КС-1 "Комета", NATO reporting name: Kennel), also referred to as AS-1 and KS-1 (крылатый снаряд - winged projectile) was a Soviet short range air-to-surface missile, primarily developed for anti-ship missions. It was carried on two aircraft, the Tupolev Tu-4 and the Tupolev Tu-16. Development Development begun in 1947 along with a related ground-launched missile, the SSC-2B "Samlet" (S-2 Sopka), both missiles using aerodynamics derived from the Mikoyan-Gurevich MiG-15 fighter aircraft, and developed under the anti-ship missile codename "Komet". The KS-1 was designed for use against surface ships. It resembled a scaled-down MiG-15 with the cockpit and undercarriage removed. Its main fuselage was cigar-shaped with swept wings and an aircraft type tail. It was propelled by a Klimov RD-500K turbojet engine, reverse-engineered from the Rolls-Royce Derwent. Guidance was provided by an inertial navigation system (INS) in the midcou ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Continuous-rod Warhead
A continuous-rod warhead is a specialized munition exhibiting an annular blast fragmentation pattern, thus when exploding it spreads into a large circle cutting through target. It is used in anti-aircraft and anti-missile missiles. Early anti-aircraft munitions Rifle and machine-gun bullets were used against early military aircraft during World War I. Artillery was used when aircraft flew above the range of rifle and machine-gun cartridges. Since the probability of actually striking the aircraft was small, artillery shells were designed to explode at the approximate altitude of the aircraft to throw a shower of fragments in the vicinity of the explosion. Similar anti-aircraft weaponry with larger calibers, higher rates of fire, and improved fuzes continued to be used through World War II. These bullets and small fragments often made small holes in the airframe. Unless a bullet or fragment struck the pilot, or some critical part of the airframe, (like a fuel line, part of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
State Of The Art
The state of the art (sometimes cutting edge or leading edge) refers to the highest level of general development, as of a device, technique, or scientific field achieved at a particular time. However, in some contexts it can also refer to a level of development reached at any particular time as a result of the common methodologies employed at the time. The term has been used since 1910, and has become both a common term in advertising and marketing, and a legally significant phrase with respect to both patent law and tort liability. In advertising, the phrase is often used to convey that a product is made with the best or latest available technology, but it has been noted that "the term 'state of the art' requires little proof on the part of advertisers", as it is considered mere puffery. The use of the term in patent law "does not connote even superiority, let alone the superlative quality the ad writers would have us ascribe to the term". Origin and history The origin of th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vacuum Tube
A vacuum tube, electron tube, valve (British usage), or tube (North America), is a device that controls electric current flow in a high vacuum between electrodes to which an electric voltage, potential difference has been applied. The type known as a thermionic tube or thermionic valve utilizes thermionic emission of electrons from a hot cathode for fundamental electronic functions such as signal amplifier, amplification and current rectifier, rectification. Non-thermionic types such as a vacuum phototube, however, achieve electron emission through the photoelectric effect, and are used for such purposes as the detection of light intensities. In both types, the electrons are accelerated from the cathode to the anode by the electric field in the tube. The simplest vacuum tube, the diode (i.e. Fleming valve), invented in 1904 by John Ambrose Fleming, contains only a heated electron-emitting cathode and an anode. Electrons can only flow in one direction through the device—fro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Continuous Wave Radar
Continuous-wave radar (CW radar) is a type of radar system where a known stable frequency continuous wave radio energy is transmitted and then received from any reflecting objects. Individual objects can be detected using the Doppler effect, which causes the received signal to have a different frequency from the transmitted signal, allowing it to be detected by filtering out the transmitted frequency. Doppler-analysis of radar returns can allow the filtering out of slow or non-moving objects, thus offering immunity to interference from large stationary objects and slow-moving clutter. This makes it particularly useful for looking for objects against a background reflector, for instance, allowing a high-flying aircraft to look for aircraft flying at low altitude against the background of the surface. Because the very strong reflection off the surface can be filtered out, the much smaller reflection from a target can still be seen. CW radar systems are used at both ends of the rang ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Q Band
The Q band is a range of frequencies contained in the microwave region of the electromagnetic spectrum. Common usage places this range between 33 and 50 GHz, but may vary depending on the source using the term. The foregoing range corresponds to the recommended frequency band of operation of WR22 waveguides. These frequencies are equivalent to wavelengths between 6 mm and 9.1 mm in air/vacuum. The Q band is in the EHF range of the radio spectrum. The term "Q band" does not have a consistently precise usage in the technical literature, but tends to be a concurrent subset of both the IEEE designated Ka band (26.5–40 GHz) and V band (40–75 GHz). Neither the IEEE nor the ITU-R recognize the Q band in their standards, which define the nomenclature of bands in the electromagnetic spectrum. The ISO recognizes the Q band; however, the range therefore defined is 36 to 46 GHz. Other ISO frequency band definitions do not precisely match the conc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
X Band
The X band is the designation for a band of frequencies in the microwave radio region of the electromagnetic spectrum. In some cases, such as in communication engineering, the frequency range of the X band is rather indefinitely set at approximately 7.0–11.2 GHz. In radar engineering, the frequency range is specified by the Institute of Electrical and Electronics Engineers (IEEE) as 8.0–12.0 GHz. The X band is used for radar, satellite communication, and wireless computer networks. Radar X band is used in radar applications including continuous-wave, pulsed, single- polarization, dual-polarization, synthetic aperture radar, and phased arrays. X band radar frequency sub-bands are used in civil, military, and government institutions for weather monitoring, air traffic control, maritime vessel traffic control, defense tracking, and vehicle speed detection for law enforcement. X band is often used in modern radars. The shorter wavelengths of the X band allow ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
S Band
The S band is a designation by the Institute of Electrical and Electronics Engineers (IEEE) for a part of the microwave band of the electromagnetic spectrum covering frequencies from 2 to 4 gigahertz (GHz). Thus it crosses the conventional boundary between the UHF and SHF bands at 3.0 GHz. The S band is used by airport surveillance radar for air traffic control, weather radar, surface ship radar, and some communications satellites, especially those used by NASA to communicate with the Space Shuttle and the International Space Station. The 10 cm radar short-band ranges roughly from 1.55 to 5.2 GHz. The S band also contains the 2.4–2.483 GHz ISM band, widely used for low power unlicensed microwave devices such as cordless phones, wireless headphones (Bluetooth), wireless networking (WiFi), garage door openers, keyless vehicle locks, baby monitors as well as for medical diathermy machines and microwave ovens (typically at 2.495 GHz). India's re ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Green Cheese (missile)
Green Cheese was a British-made radar-guided anti-ship tactical nuclear warhead missile project of the 1950s. Green Cheese arose as part of the ' ''Sverdlov'' crisis', when the Royal Navy were concerned over the appearance of a new Soviet heavy cruiser class. It was a longer-ranged and guided replacement for the unguided Red Angel, which had required an approach by the attacker too close to be considered survivable. It was developed by Fairey Aviation to be used by the Fairey Gannet shipborne anti-submarine warfare aircraft, and was originally called Fairey Project 7. However, the missile's 3,800 lb (1720 kg) weight proved to be too heavy for the Gannet, and would have required modifications to the Gannet's bomb bay to expose the missiles' seeker heads to the target before launch. The missile project continued, since the Blackburn Buccaneer naval strike aircraft had a rotating bomb bay which was ideally suited to the task. The project was cancelled in 1956 due in par ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Frigate
A frigate () is a type of warship. In different eras, the roles and capabilities of ships classified as frigates have varied somewhat. The name frigate in the 17th to early 18th centuries was given to any full-rigged ship built for speed and maneuverability, intended to be used in scouting, escort and patrol roles. The term was applied loosely to ships varying greatly in design. In the second quarter of the 18th century, the 'true frigate' was developed in France. This type of vessel was characterised by possessing only one armed deck, with an unarmed deck below it used for berthing the crew. Late in the 19th century (British and French prototypes were constructed in 1858), armoured frigates were developed as powerful ironclad warships, the term frigate was used because of their single gun deck. Later developments in ironclad ships rendered the frigate designation obsolete and the term fell out of favour. During the Second World War the name 'frigate' was reintroduced to des ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ministry Of Supply
The Ministry of Supply (MoS) was a department of the UK government formed in 1939 to co-ordinate the supply of equipment to all three British armed forces, headed by the Minister of Supply. A separate ministry, however, was responsible for aircraft production, and the Admiralty retained responsibilities for supplying the Royal Navy.Hornby (1958) During the war years the MoS was based at Shell Mex House in The Strand, London. The Ministry of Supply also took over all army research establishments in 1939. The Ministry of Aircraft Production was abolished in 1946, and the MoS took over its responsibilities for aircraft, including the associated research establishments. In the same year, it also took on increased responsibilities for atomic weapons, including the H-bomb development programme. The Ministry of Supply was abolished in late 1959 and its responsibilities passed to the Ministry of Aviation, the War Office, and the Air Ministry. The latter two ministries were subsequently ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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