The Transall C-160 is a military transport aircraft , produced as a joint venture between France and Germany . " Transall " is a German abbreviation of the manufacturing consortium Transporter Allianz , comprising the companies of MBB , Aerospatiale , and VFW-Fokker . It was initially developed to meet the requirements for a modern transport aircraft for the French and German Air Forces ; export sales were also made to South Africa and to Turkey , as well as a small number to civilian operators.
152-638: The C-160 remains in service more than 60 years after the type's first flight in 1963. It has provided logistical support to overseas operations and has served in specialist roles such as an aerial refueling tanker, electronic intelligence gathering, and as a communications platform. The C-160 is replaced in French and German service by the Airbus A400M Atlas , and a small number of Lockheed-Martin C-130J Super Hercules operated in
304-399: A V-tail configuration, are used to move the boom by creating aerodynamic forces. They are actuated hydraulically and controlled by the boom operator using a control stick. The boom operator also telescopes the boom to make the connection with the receiver's receptacle. To complete an aerial refueling, the tanker and receiver aircraft rendezvous, flying in formation. The receiver moves to
456-520: A carrier air wing ) to extend the range of its strike aircraft. In other cases, using the buddy store method allows a carrier -based aircraft to take-off with a heavier than usual load less fuel than might be necessary for its tasking. The aircraft would then topped-up with fuel from an HDU-equipped "buddy" tanker, a method previously used by the Royal Navy in operating its Supermarine Scimitar , de Havilland Sea Vixen , and Blackburn Buccaneers ; in
608-465: A structure gauge of 5,500 by 4,880 mm (18 ft 1 in by 16 ft 0 in). China is building numerous new railways in sub-Saharan Africa and Southeast Asia (such as in Kenya and Laos), and these are being built to "Chinese Standards". This presumably means track gauge, loading gauge, structure gauge, couplings, brakes, electrification, etc. An exception may be double stacking , which has
760-439: A 250 m (12.4 ch ; 820 ft ) radius curve. The TGVs , which are 2.9 m (9 ft 6 in) wide, fall within this limit. The designation of a GB+ loading gauge refers to the plan to create a pan-European freight network for ISO containers and trailers with loaded ISO containers. These container trains ( piggy-back trains ) fit into the B envelope with a flat top so that only minor changes are required for
912-455: A Hose Drum Unit (HDU). When not in use, the hose/drogue is reeled completely into the HDU. The receiver has a probe , which is a rigid, protruding or pivoted retractable arm placed on the aircraft's nose or fuselage to make the connection. Most modern versions of the probe are usually designed to be retractable, and are retracted when not in use, particularly on high-speed aircraft. At the end of
1064-587: A Return-To-Launch-Site abort capability if necessary. At its most efficient altitude and speed, the Blackbird was capable of flying for many hours without refueling. The SR-71 used a special fuel, JP-7 , with a very high flash point to withstand the extreme skin temperatures generated during Mach 3+ cruise flight. While JP-7 could be used by other aircraft, its burn characteristics posed problems in certain situations (such as high-altitude, emergency engine starts) that made it less than optimal for aircraft other than
1216-540: A boom system followed quickly in the autumn of 1948. The first use of aerial refueling in combat took place during the Korean War, involving F-84 fighter-bombers flying missions from Japanese airfields, due to Chinese-North Korean forces overrunning many of the bases for jet aircraft in South Korea, refueling from converted B-29s using the drogue-and-probe in-flight refueling system with the probe located in one of
1368-695: A border conflict with Angola . In May 1978, several C-160s dropped paratroopers of the French Foreign Legion during the Battle of Kolwezi . In 1977, the French Air Force ordered an updated version designated C-160NG , for Nouvelle Génération ("New Generation"). From 1981, 29 of these aircraft were delivered, half of them configured as tanker aircraft for aerial refuelling . Another four were configured as C-160H Astarté TACAMO aircraft for communication with submerged submarines ,
1520-403: A common "lower sector structure gauge" with a common freight platform at 1,100 mm (43.31 in) above rail. In addition, gauge C1 provides a specification for standard coach stock, gauge C3 for longer Mark 3 coaching stock, gauge C4 for Pendolino stock and gauge UK1 for high-speed rail. There is also a gauge for locomotives. The size of container that can be conveyed depends both upon
1672-546: A constant temperature by integrated air conditioning systems. Additionally, the landing gear can be partially retracted while on the ground. This lowers the C-160, making it easier to move vehicles into the hold as they don't need to climb a ramp. One aspect of the C-160 that made the type well suited to tactical operations is its short airfield performance, including the ability to perform steep descents of up to 20 degrees and perform landings on airstrips as short as 400 meters. In
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#17327827182971824-448: A contract was signed for 160 C-160s (110 for Germany and 50 for France) on 24 September 1964. Manufacturing work was split between Germany and France in line with the number of orders placed; Nord built the wings and engine nacelles, VFW the centre fuselage and horizontal tail, and HFB the forward and rear fuselage. The aircraft's tail fin was to be built by Dornier . Three production lines were set up to assemble these components at each of
1976-580: A feat made possible by four aerial refuelings from four pairs of KB-29M tankers of the 43d ARS. Before the mission, crews of the 43rd had experienced only a single operational air refueling contact. The flight started and ended at Carswell Air Force Base in Fort Worth, Texas with the refuelings accomplished over the Azores , Saudi Arabia , the Pacific Ocean near Guam , and between Hawaii and
2128-403: A flexible hose that trails from the tanker aircraft. The drogue (or para-drogue ), sometimes called a basket , is a fitting resembling a shuttlecock , attached at its narrow end (like the "cork" nose of a shuttlecock) with a valve to a flexible hose. The drogue stabilizes the hose in flight and provides a funnel to aid insertion of the receiver aircraft probe into the hose. The hose connects to
2280-404: A four-aircraft strike package. USAF KC-135 and French Air Force KC-135FR refueling-boom equipped tankers can be field-converted to a probe-and-drogue system using a special adapter unit. In this configuration, the tanker retains its articulated boom, but has a hose/drogue at the end of it instead of the usual nozzle. The tanker boom operator holds the boom still while the receiver aircraft flies
2432-551: A height limit of 5,850 mm (19 ft 2 in). Metre gauge in China has a gauge of 3,050 mm (10 ft 0 in). Translation of legend: Trains on the Shinkansen network operate on 1,435 mm ( 4 ft 8 + 1 ⁄ 2 in ) standard gauge track and have a loading gauge of 3,400 mm (11 ft 2 in) maximum width and 4,500 mm (14 ft 9 in) maximum height. This allows
2584-711: A higher loading gauge. The width of these extra-height cars is covered by AAR Plate D1 . All the Class I rail companies have invested in longterm projects to increase clearances to allow double stack freight. The mainline North American rail networks of the Union Pacific, the BNSF, the Canadian National, and the Canadian Pacific, have already been upgraded to AAR Plate K . This represents over 60% of
2736-493: A hose-and-drogue system, dubbed UPAZ, and thus later Russian aircraft may be equipped with probe and drogue. The Chinese PLAF has a fleet of Xian H-6 bombers modified for aerial refueling, and plans to add Russian Ilyushin Il-78 aerial refueling tankers. Tankers can be equipped with multipoint hose-and-drogue systems, allowing them to refuel two (or more) aircraft simultaneously, reducing time spent refueling by as much as 75% for
2888-532: A larger carbody width of 3,300 mm (10 ft 10 in) from the specifications of passenger rolling stock, and a height of 4,770 mm (15 ft 8 in) per P70-type boxcar specifications. Some of the new railways being built in Africa allow for double-stacked containers, the height of which is about 5,800 mm (19 ft 0 in) depending on the height of each container 2,438 mm (8 ft 0 in) or 2,900 mm (9 ft 6 in) plus
3040-665: A more generous loading gauge pressed for neighboring countries to upgrade their own standards. This was particularly true in continental Europe where the Nordic countries and Germany with their relatively generous loading gauge wanted their cars and locomotives to be able to run throughout the standard gauge network without being limited to a small size. France, which at the time had the most restrictive loading gauge ultimately compromised giving rise to Berne gauge which came into effect just before World War I. Military railways were often built to particularly high standards, especially after
3192-416: A much smaller position-keeping tolerance, staying properly connected to a KC-135 adapter unit is considerably more difficult than staying in a traditional hose/drogue configuration. When fueling is complete, the receiver carefully backs off until the probe refueling valve disconnects from the valve in the basket. Off center disengagements, like engagements, can cause the drogue to "prang" the probe and/or strike
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#17327827182973344-458: A multinational unit. In the late 1950s, a requirement arose to replace the piston-engined Nord Noratlas transports operated by the air forces of both France ( Armée de l'Air ) and Germany ( Luftwaffe ). Keen to encourage industrial co-operation between the two countries, as had happened under a previous arrangement in which Noratlases for German service had been built under license by Weser Flugzeugbau , France and Germany signed an agreement for
3496-409: A network, even if the track gauge is uniform. The term loading gauge can also be applied to the maximum size of road vehicles in relation to tunnels , overpasses and bridges , and doors into automobile repair shops , bus garages , filling stations , residential garages , multi-storey car parks and warehouses . A related but separate gauge is the structure gauge , which sets limits to
3648-444: A new jet endurance record. FRL still exists as part of Cobham plc . Modern specialized tanker aircraft have equipment specially designed for the task of offloading fuel to the receiver aircraft, based on drogue and probe, even at the higher speeds modern jet aircraft typically need to remain airborne. In January 1948, General Carl Spaatz, then the first Chief of Staff of the new United States Air Force , made aerial refueling
3800-400: A physical structure, sometimes using electronic detectors using light beams on an arm or gantry placed over the exit lines of goods yards or at the entry point to a restricted part of a network. The devices ensure that loads stacked on open or flat wagons stay within the height/shape limits of the line's bridges and tunnels, and prevent out-of-gauge rolling stock entering a stretch of line with
3952-484: A pioneer of long-distance aviation. During the 1920s, he made long-distance flights to places as far afield as Africa and Australia and he began experimenting with the possibilities of in-flight refueling to extend the range of flight. Cobham was one of the founding directors of Airspeed Limited , an aircraft manufacturing company that went on to produce a specially-adapted Airspeed Courier that Cobham used for his early experiments with in-flight refueling. This craft
4104-588: A platform height of 1,100 mm (3 ft 7 in) where it is limited by half-height platform screen doors . Above the platform gate height of 1,200 mm (3 ft 11 in) above the platforms, out-of-gauge installations can be further maximized to the Asian standard at 3,400 mm (11 ft 2 in). Meanwhile, the PNR South Long Haul will follow the Chinese gauge and therefore use
4256-407: A position behind the tanker, within safe limits of travel for the boom, aided by director lights or directions radioed by the boom operator. Once in position, the operator extends the boom to make contact with the receiver aircraft. Once in contact, fuel is pumped through the boom into the receiver aircraft. While in contact, the receiver pilot must continue to fly within the "air refueling envelope",
4408-568: A railway of a particular gauge is also influenced by the design of the rolling stock. Low-deck rolling stock can sometimes be used to carry taller 9 ft 6 in (2.9 m) shipping containers on lower gauge lines although their low-deck rolling stock cannot then carry as many containers. Rapid transit (metro) railways generally have a very small loading gauge, which reduces the cost of tunnel construction. These systems only use their own specialised rolling stock. Larger out-of-gauge loads can also sometimes be conveyed by taking one or more of
4560-782: A regular detachment of C-160s was also dispatched in support of the multinational International Security Assistance Force presence in the Afghanistan . Both French and German C-160s were used in supporting Operation Serval , the French-led intervention in the Northern Mali conflict . For either humanitarian or military purposes, C-160s have conducted extensive operations in a number of nations, including Mauritania , Niger , Chad , Ethiopia , Bosnia , and Lebanon . Starting in 1984 onwards, German airframes underwent LEDA I and LEDA II life extension measures, which were focused on
4712-414: A rounded roof structure, those for W10 to W12 define a flat line at the top and, instead of a strict static gauge for the wagons, their sizes are derived from dynamic gauge computations for rectangular freight containers. Network Rail uses a W loading gauge classification system of freight transport ranging from W6A (smallest) through W7, W8, W9, W9Plus, W10, W11 to W12 (largest). The definitions assume
Transall C-160 - Misplaced Pages Continue
4864-584: A similar dropped line from the receiver, allowing the refueling to commence. In 1935, Cobham sold off the airline Cobham Air Routes Ltd to Olley Air Service and turned to the development of inflight refueling, founding the company Flight Refuelling Ltd . Atcherly's system was bought up by Cobham's company, and with some refinement and continuous improvement through the late '30s, it became the first practical refueling system. Sir Alan Cobham 's grappled-line looped-hose air-to-air refueling system borrowed from techniques patented by David Nicolson and John Lord, and
5016-417: A single mission, without landing to install an adapter. Other tankers are equipped with hose-and-drogue attachments that do not interfere with the operation of the centerline boom: many KC-135s are equipped with dual under-wing attachments known as Multi-point Refueling System (MPRSs), while some KC-10s and A330 MRTTs have similar under-wing refueling pods (referred to as Wing Air Refueling Pods or WARPs on
5168-509: A small number of FRL looped-hose units and fitted a number of B-29s as tankers to refuel specially equipped B-29s and later B-50s. The USAF made only one major change in the system used by the RAF. The USAF version had auto-coupling of the refueling nozzle, where the leader line with the refueling hose is pulled to the receiver aircraft and a refueling receptacle on the belly of the aircraft, allowing high-altitude air-to-air refueling and doing away with
5320-442: A smaller loading gauge. Compliance with a loading gauge can be checked with a clearance car . In the past, these were simple wooden frames or physical feelers mounted on rolling stock. More recently, laser beams are used. The loading gauge is the maximum size of rolling stock. It is distinct from the minimum structure gauge , which sets limits to the size of bridges and tunnels on the line, allowing for engineering tolerances and
5472-575: A squadron of Javelin air defense aircraft was refueled in stages from the UK to India and back (exercise "Shiksha"). After the retirement of the Valiant in 1965, the Handley Page Victor took over the UK refueling role and had three hoses (HDUs). These were a fuselage-mounted HDU and a refueling pod on each wing. The center hose could refuel any probe-equipped aircraft, the wing pods could refuel
5624-600: A top priority of the service. In March 1948, the USAF purchased two sets of FRL's looped-hose in-flight refueling equipment, which had been in practical use with British Overseas Airways Corporation (BOAC) since 1946, and manufacturing rights to the system. FRL also provided a year of technical assistance. The sets were immediately installed in two Boeing B-29 Superfortresses , with plans to equip 80 B-29s. Flight testing began in May 1948 at Wright-Patterson Air Force Base , Ohio , and
5776-477: A versatile aircraft, leading to a long operational service life. Between its introduction and 1999, approximately 2000 modifications and upgrades were incorporated upon the type, split 60/40 between the structure and equipment respectively. Many changes were made over time in regards to the aircraft's avionics, incorporating new features such as GPS and laser inertial navigation systems, modern autopilot and crew management systems. Other improvements and additions to
5928-578: A vital component of France's nuclear deterrent system. In a final conversion, two aircraft were furnished for SIGINT electronic surveillance, designated C-160G Gabriel , replacing the Noratlases that had been in this role previously. In routine operations, the C-160Gs would often supplement France's Boeing E-3 Sentry AWACS aircraft. In 1991, a SIGINT-equipped C-160G was deployed as part of France's contribution to Coalition forces during and after
6080-583: Is a refinement of W5, and the W6a changed the lower body to accommodate third-rail electrification. While the upper body is rounded for W6a with a static curve, there is an additional small rectangular notch for W7 to accommodate the transport of 2.44 m (8 ft 0 in) ISO containers, and the W8 loading gauge has an even larger notch spanning outside of the curve to accommodate the transport of 2.6 m (8 ft 6 in) ISO containers. While W5 to W9 are based on
6232-425: Is a twin-engine tactical transport featuring a cargo hold, a rear-access ramp beneath an upswept tail, a high-mounted wing and turboprop engines. The C-160 is designed to perform cargo and troop transport duties, aerial delivery of supplies and equipment and is designed to be compatible with international railway loading gauges to simplify cargo logistics and loading. In flight the cargo area is pressurised and kept at
Transall C-160 - Misplaced Pages Continue
6384-400: Is currently no uniform standard for loading gauges in the country and both loading gauges and platform heights vary by rail line. The North–South Commuter Railway allows passenger trains with a carbody width of 3,100 mm (10 ft 2 in) and a height of 4,300 mm (14 ft 1 in). Additional installations shall also be allowed up to 3,300 mm (10 ft 10 in) at
6536-481: Is discussed under narrow gauge , below. The body frame may have a maximum height of 4,500 mm (14 ft 9 in) and a maximum width of 3,400 mm (11 ft 2 in) with additional installations allowed up to 3,600 mm (11 ft 10 in). That width of 3,400 mm is only allowed above 1,250 mm (4 ft 1 in) as the common passenger platforms are built to former standard trains of 3,200 mm (10 ft 6 in) in width. There
6688-688: Is generally acceptable as the extra width is above normal platform height, but it means that they can not use the high platforms that Arlanda Express uses ( Arlanda Central Station has normal clearances). The greater width allows sleeping cars in which tall people can sleep with straight legs and feet, which is not the case on the continent. In the Netherlands, a similar shape to the UIC C is used that rises to 4.70 m (15 ft 5 in) in height. The trains are wider allowing for 3.40 m (11 ft 2 in) width similar to Sweden. About one third of
6840-472: Is not compatible with flying boom equipment, creating a problem for military planners where mixed forces are involved. Incompatibility can also complicate the procurement of new systems. The Royal Canadian Air Force currently wish to purchase the F-35A , which can only refuel via the flying boom, but only possess probe-and-drogue refuelers . The potential cost of converting F-35As to probe-and-drogue refueling (as
6992-447: Is relatively light (typically soft canvas webbing) and subject to aerodynamic forces, it can be pushed around by the bow wave of approaching aircraft, exacerbating engagement even in smooth air. After initial contact, the hose and drogue is pushed forward by the receiver a certain distance (typically, a few feet), and the hose is reeled slowly back onto its drum in the HDU. This opens the tanker's main refueling valve allowing fuel to flow to
7144-515: Is still the maximum height and truck center combination and the circulation of AAR Plate C is somewhat restricted. The prevalence of excess-height rolling stock, at first ~18 ft (5.49 m) piggybacks and hicube boxcars , then later autoracks , airplane-parts cars, and flatcars for hauling Boeing 737 fuselages, as well as 20 ft 3 in (6.17 m) high double-stacked containers in container well cars , has been increasing. This means that most, if not all, lines are now designed for
7296-479: Is that they permit double decker passenger carriages. Although mainly used for suburban commuter lines, France is notable for using them on its high speed TGV services: the SNCF TGV Duplex carriages are 4,303 millimetres (14 ft 1 + 3 ⁄ 8 in) high, the Netherlands, Belgium and Switzerland feature large numbers of double decker intercity trains as well. Great Britain has (in general)
7448-618: Is the process of transferring aviation fuel from one aircraft (the tanker ) to another (the receiver) while both aircraft are in flight. The two main refueling systems are probe-and-drogue , which is simpler to adapt to existing aircraft and the flying boom , which offers faster fuel transfer, but requires a dedicated boom operator station. The procedure allows the receiving aircraft to remain airborne longer, extending its range or loiter time. A series of air refuelings can give range limited only by crew fatigue /physical needs and engineering factors such as engine oil consumption. Because
7600-479: Is used on US Navy & Marine Corps F-35Bs and F-35Cs ) added to the early-2010s political controversy which surrounded F-35 procurement within the RCAF. These concerns can be addressed by drogue adapters (see section "Boom drogue adapter units" above) that allow drogue aircraft to refuel from boom-equipped aircraft, and by refuelers that are equipped with both drogue and boom units and can thus refuel both types in
7752-670: The American Civil War and the Franco-Prussian War showed the importance of railroads in military deployment as well as mobilization . The Kaiserreich was particularly active in the construction of military railways which were often built with great expense to be as flat, straight and permissive in loading gauge as possible while bypassing major urban areas, making those lines of little use to civilian traffic, particularly civilian passenger traffic. However, all those aforementioned factors have in some cases led to
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#17327827182977904-709: The Aéro-Club de France and the 34th Aviation Regiment of the French Air Force were able to demonstrate passing fuel between machines at the annual aviation fete at Vincennes in 1928. The UK's Royal Aircraft Establishment was also running mid-air refueling trials, with the aim to use this technique to extend the range of the long-distance flying boats that serviced the British Empire . By 1931 they had demonstrated refueling between two Vickers Virginias , with fuel flow controlled by an automatic valve on
8056-658: The Green Line (known as the Tremont Street subway ) was constructed in 1897 to take the streetcars off Boston 's busy downtown streets. When the Blue Line opened in 1904, it only ran streetcar services; the line was converted to rapid transit in 1924 due to high passenger loads, but the tight clearances in the tunnel under the Boston Harbor required narrower and shorter rapid transit cars. The Orange Line
8208-495: The Gulf War to support a no-fly zone and embargoing of Iraq . C-160s were in continuous use to support French bases in sub-Saharan Africa; the tanker variants also proved valuable in supporting African operations. The C-160 fleet was the staple of the French military airlift capability for many years, supplemented by small numbers of McDonnell Douglas DC-8s , CASA/IPTN CN-235 and Lockheed C-130 Hercules as of 1990. During
8360-579: The Shinkansen of Japan, have all adopted a loading gauge of 3,400 mm (11 ft 2 in) maximum width and can accept the maximum height of 4,500 mm (14 ft 9 in). The maximum height, width, and length of general Chinese rolling stock are 4,800 mm (15 ft 9 in), 3,400 mm (11 ft 2 in) and 26 m (85 ft 4 in) respectively, with an extra out-of-gauge load allowance of height and width 5,300 by 4,450 mm (17 ft 5 in by 14 ft 7 in) with some special shape limitation, corresponding to
8512-618: The Short Empire flying boat Cambria from an Armstrong Whitworth AW.23 . Handley Page Harrows were used in the 1939 trials to perform aerial refueling of the Empire flying boats for regular transatlantic crossings. From 5 August to 1 October 1939, sixteen crossings of the Atlantic were made by Empire flying boats, with fifteen crossings using FRL's aerial refueling system. After the sixteen crossings further trials were suspended due to
8664-589: The South African Border War during the late 1980s, the South African Air Force's C-160s were vital for deploying and supplying troops in the border region and into positions in southern Angola due to the otherwise-impassable terrain. The importance of airpower in the war led to a great deal of the fighting being centred upon remote airstrips, both sides trying to gain or deny the same advantageous positions and place stress upon
8816-476: The West Coast . Cobham's company FRL soon realized that their looped-hose system left much to be desired and began work on an improved system that is now commonly called the probe-and-drogue air-to-air refueling system and today is one of the two systems chosen by air forces for air-to-air refueling, the other being the flying-boom system. In post-war trials the RAF used a modified Lancaster tanker employing
8968-433: The "receptacle" in the receiver aircraft during fuel transfer. A poppet valve in the end of the nozzle prevents fuel from exiting the tube until the nozzle properly mates with the receiver's refueling receptacle. Once properly mated, toggles in the receptacle engage the nozzle, holding it locked during fuel transfer. The "flying" boom is so named because flight control surfaces , small movable airfoils that are often in
9120-638: The 1940s and 1950s, the American passenger car loading gauge was increased to a 16 ft 6 in (5.03 m) height throughout most of the country outside the Northeast, to accommodate dome cars and later Superliners and other bilevel commuter trains. Bilevel and Hi-level passenger cars have been in use since the 1950s, and new passenger equipment with a height of 19 ft 9 + 1 ⁄ 2 in (6.03 m) has been built for use in Alaska and
9272-456: The 19th century has condemned it to the small infrastructure dimensions of that era. Conversely, the loading gauge s of countries that were satellites of the former Soviet Union are much larger than the TSI specification. Other than for GB+, they are not likely to be retrofitted, given the enormous cost and disruption that would be entailed. A specific example of the value of these loading gauges
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#17327827182979424-572: The Blackbird constantly leaked fuel before heating expanded the airframe enough to seal its fuel tanks. Following the supersonic dash the SR-71 would then rendezvous with a tanker to fill its now nearly empty tanks before proceeding on its mission. This was referred to as the LTTR (for "Launch To Tanker Rendezvous") profile. LTTR had the added advantage of providing an operational test of the Blackbird's refueling capability within minutes after takeoff, enabling
9576-582: The Boeing plant at Renton, Washington . Boeing went on to develop the world's first production aerial tanker, the KC-97 Stratofreighter , a piston-engined Boeing Stratocruiser (USAF designation C-97 Stratofreighter ) with a Boeing-developed flying boom and extra kerosene (jet fuel) tanks feeding the boom. The Stratocruiser airliner itself was developed from the B-29 bomber after World War II . In
9728-509: The Buccaneer's case using a bomb-bay-mounted tank and HDU. The tanker aircraft flies straight and level and extends the hose/drogue, which is allowed to trail out behind and below the tanker under normal aerodynamic forces. The pilot of the receiver aircraft extends the probe (if required) and uses normal flight controls to "fly" the refueling probe directly into the basket. This requires a closure rate of about two knots (walking speed) to push
9880-558: The C-160 was produced during the 1980s. Amongst changes made, the new variant was equipped with additional fuel tankage, aerial refuelling probes and enhanced avionics. While there were considerable changes to instrumentation, including the navigational and autopilot systems, the second generation C-160 retained the original operating characteristics to simplify crew transfers between types. The second generation C-160s were also designed for potential adaptation to other roles such as maritime patrol and aerial fire fighting. The C-160 proved to be
10032-635: The Canadian Rockies. The structure gauge of the Mount Royal Tunnel used to limit the height of bilevel cars to 14 feet 6 inches (4.42 m) before it was permanently closed to interchange rail traffic prior to its conversion for the REM rapid transit system. The New York City Subway is an amalgamation of three former constituent companies, and while all are standard gauge , inconsistencies in loading gauge prevent cars from
10184-427: The Class I rail network. The old standard North American passenger railcar is 10 ft 6 in (3.20 m) wide by 14 ft 6 in (4.42 m) high and measures 85 ft 0 in (25.91 m) over coupler pulling faces with 59 ft 6 in (18.14 m) truck centers, or 86 ft 0 in (26.21 m) over coupler pulling faces with 60 ft 0 in (18.29 m) truck centers. In
10336-568: The Committee on the question of the diameter of the underground tubes containing the railways has been distinctly in favour of a minimum diameter of 11 ft 6 in (3.51 m)". After that, all tube lines were at least that size. Sweden uses shapes similar to the Central European loading gauge, but trains are allowed to be much wider. There are three main classes in use (width × height): The Iron Ore Line north of Kiruna
10488-697: The Dutch passenger trains use bilevel rail cars . However, Dutch platforms are much higher than Swedish ones. The American loading gauge for freight cars on the North American rail network is generally based on standards set by the Association of American Railroads (AAR) Mechanical Division. The most widespread standards are AAR Plate B and AAR Plate C , but higher loading gauges have been introduced on major routes outside urban centers to accommodate rolling stock that makes better economic use of
10640-537: The F and NG aircraft operated in French air forces have been converted to the last upgraded C-160R standard. Last aircraft retired in May 2022. Data from Jane's All The World's Aircraft 1982–83 General characteristics Performance Aircraft of comparable role, configuration, and era Related lists Aerial refueling Aerial refueling ( en-us ), or aerial refuelling ( en-gb ), also referred to as air refueling , in-flight refueling ( IFR ), air-to-air refueling ( AAR ), and tanking ,
10792-452: The F-84's wing-tip fuel tanks. The flying boom is a rigid, telescoping tube with movable flight control surfaces that a boom operator on the tanker aircraft extends and inserts into a receptacle on the receiving aircraft. All boom-equipped tankers (e.g. KC-135 Stratotanker , KC-10 Extender , KC-46 Pegasus ) have a single boom and can refuel one aircraft at a time with this mechanism. In
10944-555: The French Air Force introduced the C-160G Gabriel variant, a SIGINT aircraft easily to distinguish because of the antennas fitted to the aircraft. Until the early 2000s, also the C-160H Astarte was used, while Astarté (Avion Station Relais de Transmissions Exceptionelles), meaning "airborne relay station for special transmissions", was used for communication with submerged French nuclear submarines. Since 1999, all
11096-640: The French Defence Ministry announced a modernisation of the C-160 fleet, enabling it to continue in service until 2018 if required. In late 2011, it was announced that Germany's Transall fleet had accumulated a combined total of one million flight hours. As of 2012, the global C-160 fleet was approaching the end of its service life; all South African C-160s have already been retired, while the Turkish Air Force continued to operate 20 aircraft obtained from Germany ( C-160T ). To replace
11248-546: The German companies Weser Flugzeugbau (which became Vereinigte Flugtechnische Werke (VFW) in 1964) and Hamburger Flugzeugbau (HFB) to design and build the new transport. The new aircraft was required to carry a 16,000 kilograms (35,000 lb) cargo over a range of 1,720 kilometres (930 nmi; 1,070 mi) or a load of 8,000 kg (18,000 lb) over a range of 4,540 km (2,450 nmi; 2,820 mi) and be able to operate out of semi-prepared airstrips. One prototype
11400-405: The HDU. If the hose is pushed in too far or not far enough, a cutoff switch will inhibit fuel flow, which is typically accompanied by an amber light. Disengagement is commanded by the tanker pilot with a red light. The US Navy , Marine Corps , and some Army aircraft refuel using the "hose-and-drogue" system, as do most aircraft flown by western European militaries. The Soviet Union also used
11552-457: The KC-10). A small number of Soviet Tu-4s and Tu-16s (the tanker variant was Tu-16Z). used a wing-to-wing method. Similar to the probe-and-drogue method but more complicated, the tanker aircraft released a flexible hose from its wingtip. An aircraft flying alongside had to catch the hose with a special lock under its wingtip. After the hose was locked and the connection was established, the fuel
11704-452: The KC-97, the mixed gasoline/kerosene fuel system was clearly not desirable and it was obvious that a jet-powered tanker aircraft would be the next development, having a single type of fuel for both its own engines and for passing to receiver aircraft. The 230 mph (370 km/h) cruise speed of the slower, piston-engined KC-97 was also a serious issue, as using it as an aerial tanker forced
11856-949: The Red and Purple lines) was opened in 1993 and was designed to handle high-capacity heavy rail transit cars that would operate underground. Shortly after the Red Line began operations, the LACTC and the SCRTD merged to form the LACMTA , which became responsible for planning and construction of the Green , Gold , Expo , and K lines, as well as the D Line Extension and the Regional Connector . Major trunk raillines in East Asian countries, including China, North Korea, South Korea, as well as
12008-440: The SR-71. Loading gauge A loading gauge is a diagram or physical structure that defines the maximum height and width dimensions in railway vehicles and their loads. Their purpose is to ensure that rail vehicles can pass safely through tunnels and under bridges, and keep clear of platforms, trackside buildings and structures. Classification systems vary between different countries, and loading gauges may vary across
12160-580: The South African aircraft were all built by Nord. From 1981 on, some new C-160 reached the wings of Armee de l'Air. The now C-160NG (Nouvelle Generation, New Generation) called aircraft has a fifth fuel tank in the middle of the wing above the fuselage, a refueling probe while the left side cargo door was removed. Some first-production series C-160F were fitted with the NG-versions changes and renamed C-160R (Renové). Beside these changes, in 1989,
12312-594: The Transall's self-protection suite. The last German Transall wing was disbanded in December 2021. The initial production run of 169 aircraft were built by the three companies in France and Germany; Nord built 56 aircraft, VFW built 57 aircraft and HFB/MBB 56 (HFB became part of Messerchmitt-Bolkow-Blohm in 1969 during the production run). All three production lines produced a mixture of aircraft for France and Germany but
12464-476: The Transall, the German, French and South African Air Forces ordered 60, 50 and eight Airbus A400Ms , respectively; the South African order was later cancelled. In 2015, it was announced that the retirement of Germany's Transall fleet had been pushed back from 2018 to 2021 due to delays with the Airbus A400M; until 2021, a decreasing number of aircraft shall remain in service to perform missions that require
12616-459: The UIC Gauges definitions defining Kinematic Gauges with a reference profile such that Gauges GA and GB have a height of 4.35 m (14 ft 3 in) (they differ in shape) with Gauge GC rising to 4.70 m (15 ft 5 in) allowing for a width of 3.08 m (10 ft 1 in) of the flat roof. All cars must fall within an envelope of 3.15 m (10 ft 4 in) wide on
12768-562: The USAF to build jet tankers based on the Boeing 367-80 (Dash-80) airframe. The result was the Boeing KC-135 Stratotanker , of which 732 were built. The flying boom is attached to the rear of the tanker aircraft. The attachment is gimballed , allowing the boom to move with the receiver aircraft. The boom contains a rigid pipe to transfer fuel. The fuel pipe ends in a nozzle with a flexible ball joint. The nozzle mates to
12920-522: The USSR first had it been ordered to do so. The bombers would fly orbits around their assigned positions from which they were to enter Soviet airspace if they received the order, and the tankers would refill the bombers' fuel tanks so that they could keep a force in the air 24 hours a day, and still have enough fuel to reach their targets in the Soviet Union. This also ensured that a first strike against
13072-501: The aircraft having to fly to a lower altitude to be depressurized so a crew member could manually do the coupling. This air-to-air refueling system was used by the B-50 Superfortress Lucky Lady II of the 43rd Bomb Wing to make its famous first non-stop around-the-world flight in 1949. From 26 February to 3 March 1949, Lucky Lady II flew non-stop around the world in 94 hours and 1 minute,
13224-483: The aircraft made its mission impossible without aerial refueling. Based at Beale AFB in central California , SR-71s had to be forward-deployed to Europe and Japan prior to flying actual reconnaissance missions. These trans-Pacific and trans-Atlantic flights during deployment were impossible without aerial refueling. The SR-71's designers traded takeoff performance for better high-speed, high-altitude performance, necessitating takeoff with less-than-full fuel tanks from even
13376-408: The aircraft to be refueled (very close "line astern" formation flying) has resulted in the activity only being used in military operations ; there are no regular civilian in-flight refueling activities. Originally trialed shortly before World War II on a limited scale to extend the range of British civilian transatlantic flying boats , and then employed after World War II on a large scale to extend
13528-634: The aircraft's electronic warfare self-protection and missile approach warning systems . In July 1974, the Turkish Air Force used 7 C-160Ds during the invasion of Cyprus , to transport troops, drop paratroopers and carry supplies. Having entered service with the Turkish armed forces in 1971, these aircraft provided great amount of lift during the operation. In April 1976, the French Air Force used 12 C-160s in support of Operation Verveine , airlifting Moroccan troops and equipment to Zaïre during
13680-449: The aircraft's fuselage and causing damage. The other major difference with this system is that when contacted, the hose does not "retract" into an HDU. Instead, the hose bends depending on how far it is pushed toward the boom. If it is pushed too far, it can loop around the probe or nose of the aircraft, damage the windscreen, or cause contact with the rigid boom. If not pushed far enough, the probe will disengage, halting fueling. Because of
13832-409: The aircraft's fuselage. Some tankers have both a boom and one or more complete hose-and-drogue systems. The USAF KC-10 has both a flying boom and a separate hose-and-drogue system manufactured by Cobham . Both are on the aircraft centerline at the tail of the aircraft, so only one can be used at once. However, such a system allows all types of probe- and receptacle-equipped aircraft to be refueled in
13984-447: The airlift role, a later production C-160 could carry up to 8.5 tons across a distance of 5,000 kilometers, and take off from airstrips as short as 700 meters. Dependent upon aircraft configuration, a single aircraft could airdrop as many as 88 paratroopers or transport up to 93 equipped troops. The C-160 is powered by a pair of Rolls-Royce Tyne turboprop engines, which drive a pair of four-bladed Dowty Rotol propellers. Advantages of
14136-416: The area in which contact with the boom is safe. Moving outside of this envelope can damage the boom or lead to mid-air collision, for example the 1966 Palomares B-52 crash . If the receiving aircraft approaches the outer limits of the envelope, the boom operator will command the receiver pilot to correct their position and disconnect the boom if necessary. When the desired amount of fuel has been transferred,
14288-574: The bombers' airfields could not obliterate the US's ability to retaliate by bomber. In 1958, Valiant tankers in the UK were developed with one HDU mounted in the bomb-bay. Valiant tankers of 214 Squadron were used to demonstrate radius of action by refueling a Valiant bomber non-stop from UK to Singapore in 1960 and a Vulcan bomber to Australia in 1961. Other UK exercises involving refueling aircraft from Valiant tankers included Javelin and Lightning fighters, also Vulcan and Victor bombers. For instance, in 1962
14440-528: The brothers John, Kenneth, Albert, and Walter Hunter set a new record of 553 hours 40 minutes over Chicago using two Stinson SM-1 Detroiters as refueler and receiver. Aerial refueling remained a very dangerous process until 1935, when brothers Fred and Al Key demonstrated a spill-free refueling nozzle, designed by A. D. Hunter . They exceeded the Hunters' record by nearly 100 hours in a Curtiss Robin monoplane, staying aloft for more than 27 days. The US
14592-589: The current (or "classic") rail network loading gauge as well as the HS2 line. The "classic compatible" trainsets will cost £40 million per trainset whereas the HS2-only stock (built to European loading gauge and only suitable to operate on HS2 lines) will cost £27M per trainset despite the HS2-only stock being physically larger. It was recognized even during the nineteenth century that this would pose problems and countries whose railroads had been built or upgraded to
14744-585: The development of Alexander P. de Seversky , between two planes occurred on 25 June 1923, between two Airco DH-4B biplanes of the United States Army Air Service . An endurance record was set by three DH-4Bs (a receiver and two tankers) on 27–28 August 1923, in which the receiver airplane remained aloft for more than 37 hours using nine mid-air refueling to transfer 687 US gallons (2,600 L) of aviation gasoline and 38 US gallons (140 L) of engine oil. The same crews demonstrated
14896-474: The development of a Noratlas successor on 28 November 1957. The Italian government also became involved in the project early on to meet their own requirements, however Italy's participation in the fledgling program was soon terminated in favour of the smaller and locally-built Fiat G.222 . The consortium, "Transporter-Allianz" or Transall, was formed in January 1959 between the French company Nord Aviation and
15048-402: The drogue under the appropriate pressure (assuming the tanker crew has energized the pump). Tension on the hose is aerodynamically 'balanced' by a motor in the HDU so that as the receiver aircraft moves fore and aft, the hose retracts and extends, thus preventing bends in the hose that would cause undue side loads on the probe. Fuel flow is typically indicated by illumination of a green light near
15200-426: The extent that bridges, tunnels and other infrastructure can encroach on rail vehicles. The difference between these two gauges is called the clearance . The specified amount of clearance makes allowance for wobbling of rail vehicles at speed. The loading gauge restricts the size of passenger coaches, goods wagons (freight cars) and shipping containers that can travel on a section of railway track. It varies across
15352-494: The flying boom system, along with Australia (KC-30A), the Netherlands (KDC-10), Israel (modified Boeing 707), Japan (KC-767), Turkey (KC-135Rs), and Iran (Boeing 707 and 747). The system allows higher fuel flow rates (up to 1,000 US gallons (3,800 L) / 6,500 pounds (2,900 kg) per minute for the KC-135, but does require a boom operator, and can only refuel one aircraft at a time. The probe-and-drogue refueling method employs
15504-451: The following measures: The loading gauge on the main lines of Great Britain, most of which were built before 1900, is generally smaller than in other countries. In mainland Europe, the slightly larger Berne gauge (Gabarit passe-partout international, PPI) was agreed to in 1913 and came into force in 1914. As a result, British trains have noticeably and considerably smaller loading gauges and, for passenger trains, smaller interiors, despite
15656-526: The former BMT and IND systems ( B Division ) from running on the lines of the former IRT system ( A Division ), and vice versa. This is mainly because IRT tunnels and stations are approximately 1 foot (305 mm) narrower than the others, meaning that IRT cars running on the BMT or IND lines would have platform gaps of over 8 inches (203 mm) between the train and some platforms, whereas BMT and IND cars would not even fit into an IRT station without hitting
15808-616: The former Eastern Division , the cars are limited to 60 feet (18.29 m), while on the rest of the BMT and IND lines plus the Staten Island Railway (which uses modified IND stock) the cars may be as long as 75 feet (22.86 m). The Massachusetts Bay Transportation Authority 's (MBTA) rapid transit system is composed of four unique subway lines; while all lines are standard gauge, inconsistencies in loading gauge, electrification, and platform height prevent trains on one line from being used on another. The first segment of
15960-399: The hose several feet into the HDU and solidly couple the probe and drogue. Too little closure will cause an incomplete connection and no fuel flow (or occasionally leaking fuel). Too much closure is dangerous because it can trigger a strong transverse oscillation in the hose, severing the probe tip. The optimal approach is from behind and below (not level with) the drogue. Because the drogue
16112-458: The hose was connected, the tanker climbed sufficiently above the receiver aircraft to allow the fuel to flow under gravity. When Cobham was developing his system, he saw the need as purely for long-range transoceanic commercial aircraft flights, but modern aerial refueling is used exclusively by military aircraft. In 1934, Cobham had founded Flight Refuelling Ltd (FRL) and by 1938 had used its looped-hose system to refuel aircraft as large as
16264-460: The hose which would cut off if contact was lost. Royal Air Force officer Richard Atcherley had observed the dangerous aerial-refueling techniques in use at barnstorming events in the US and determined to create a workable system. While posted to the Middle East he developed and patented his 'crossover' system in 1934, in which the tanker trailed a large hooked line that would reel in
16416-399: The increase of truck centers, the decrease of width is covered by AAR Plates D1 and D2 . Listed here are the maximum heights and widths for cars. However, the specification in each AAR plate shows a car cross section that is chamfered at the top and bottom, meaning that a compliant car is not permitted to fill an entire rectangle of the maximum height and width. Technically, AAR Plate B
16568-661: The initial system. It is composed of two heavy rail subway lines and several light rail lines with subway sections; while all lines are standard gauge, inconsistencies in electrification and loading gauge prohibit the light rail trains from operating on the heavy rail lines, and vice versa. The LACTC-planned Blue Line was opened in 1990 and partially operates on the route of the Pacific Electric interurban railroad line between downtown Los Angeles and Long Beach, which used overhead electrification and street-running streetcar vehicles. The SCRTD-planned Red Line (later split into
16720-478: The late 1940s, General Curtis LeMay , commander of the Strategic Air Command (SAC), asked Boeing to develop a refueling system that could transfer fuel at a higher rate than had been possible with earlier systems using flexible hoses, resulting in the flying boom system. The B-29 was the first to employ the boom, and between 1950 and 1951, 116 original B-29s, designated KB-29Ps, were converted at
16872-432: The longest runways. Once airborne, the Blackbird would accelerate to supersonic speed using afterburners to facilitate structural heating and expansion. The magnitude of temperature changes experienced by the SR-71, from parked to its maximum speed, resulted in significant expansion of its structural parts in cruise flight. To allow for the expansion, the Blackbird's parts had to fit loosely when cold, so loosely, in fact, that
17024-475: The more maneuverable fighter/ground attack types. A byproduct of this development effort and the building of large numbers of tankers was that these tankers were also available to refuel cargo aircraft , fighter aircraft , and ground attack aircraft , in addition to bombers, for ferrying to distant theaters of operations. This was much used during the Vietnam War , when many aircraft could not have covered
17176-475: The most restrictive loading gauge (relative to track gauge) in the world. That is a legacy of the British railway network being the world's oldest, and of having been built by a plethora of different private companies, each with different standards for the width and height of trains. After nationalisation, a standard static gauge W5 was defined in 1951 that would virtually fit everywhere in the network. The W6 gauge
17328-423: The motion of rail vehicles. The difference between the two is called the clearance . The terms "dynamic envelope " or "kinematic envelope" – which include factors such as suspension travel, overhang on curves (at both ends and middle) and lateral motion on the track – are sometimes used in place of loading gauge. The railway platform height is also a consideration for the loading gauge of passenger trains. Where
17480-527: The much improved probe-and-drogue system, with a modified Gloster Meteor F.3 jet fighter, serial EE397 , fitted with a nose-mounted probe. On 7 August 1949, the Meteor flown by FRL test pilot Pat Hornidge took off from Tarrant Rushton and remained airborne for 12 hours and 3 minutes, receiving 2,352 imperial gallons (10,690 L) of fuel in ten refuelings from a Lancaster tanker. Hornidge flew an overall distance of 3,600 mi (5,800 km), achieving
17632-423: The network, such as auto carriers , hi-cube boxcars , and double-stack container loads . The maximum width of 10 ft 8 in (3.25 m) on 41 ft 3 in (12.57 m) ( AAR Plate B ), 46 ft 3 in (14.10 m) ( AAR Plate C ) and all other truck centers (of all other AAR Plates) are on a 441 ft 8 + 3 ⁄ 8 in (134.63 m) radius or 13° curve. In all cases of
17784-780: The new variant was split 50-50 between Aérospatiale (the successor to Nord) and MBB (which had absorbed VFW and HFB), with a single assembly line in Toulouse . The cargo loading door on the port side of the fuselage was replaced by provision for additional fuel tanks in the wing centre section. When fitted these tanks increased fuel capacity from 19,000 litres (4,190 imp gal) to 28,000 litres (6,170 imp gal). The aircraft were also fitted with updated avionics. The first second generation C-160 took flight in 1981. Aircraft produced in this batch included 29 for France (an additional four non-standard aircraft were constructed for special missions), and 6 for Indonesia. The Transall C-160
17936-404: The newer jet-powered military aircraft to slow down to mate with the tanker's boom, a highly serious issue with the newer supersonic aircraft coming into service at that time, which could force such receiving aircraft in some situations to slow down enough to approach their stall speed during the approach to the tanker. It was no surprise that, after the KC-97, Boeing began receiving contracts from
18088-642: The operation of double-deck high-speed trains. Mini Shinkansen (former conventional 1,067 mm or 3 ft 6 in narrow gauge lines that have been regauged into 1,435 mm or 4 ft 8 + 1 ⁄ 2 in standard gauge ) and some private railways in Japan (including some lines of the Tokyo subway and all of the Osaka Metro ) also use standard gauge; however, their loading gauges are different. The rest of Japan's system
18240-598: The opposing force's logistical efforts. In one particular mission, a C-160 was used to move a captured SA-8 from Angola to South Africa. The C-160 was chosen for this task over the C-130 because of its larger cargo hold and its ability to lower its hull while on the ground, which facilitated the loading of the heavy vehicle. The C-160 has been a prominent component of several other international efforts. Germany's C-160 fleet has been used to support peacekeeping efforts in Sudan ,
18392-506: The outbreak of World War II. During the closing months of World War II, it had been intended that Tiger Force 's Lancaster and Lincoln bombers would be in-flight refueled by converted Halifax tanker aircraft, fitted with the FRL's looped-hose units, in operations against the Japanese homelands , but the war ended before the aircraft could be deployed. After the war ended, the USAF bought
18544-411: The platform edge. Taking this into account, all maintenance vehicles are built to IRT loading gauge so that they can be operated over the entire network, and employees are responsible for minding the gap . Another inconsistency is the maximum permissible railcar length. Cars in the former IRT system are 51 feet (15.54 m) as of December 2013 . Railcars in the former BMT and IND can be longer: on
18696-445: The probe into the basket. Unlike the soft canvas basket used in most drogue systems, the adapter units use a steel basket, grimly known as the "iron maiden" by naval aviators because of its unforgiving nature. Soft drogues can be contacted slightly off center, wherein the probe is guided into the hose receptacle by the canvas drogue. The metal drogue, when contacted even slightly off center, will pivot out of place, potentially "slapping"
18848-585: The probe is a valve that is closed until it mates with the drogue's forward internal receptacle, after which it opens and allows fuel to pass from tanker to receiver. The valves in the probe and drogue that are most commonly used are to a NATO standard and were originally developed by the company Flight Refuelling Limited in the UK and deployed in the late 1940s and 1950s. This standardization enables drogue-equipped tanker aircraft from many nations to refuel probe-equipped aircraft from other nations. The NATO-standard probe system incorporates shear rivets that attach
19000-414: The range of strategic bombers , aerial refueling since the Vietnam War has been extensively used in large-scale military operations. Some of the earliest experiments in aerial refueling took place in the 1920s; two slow-flying aircraft flew in formation, with a hose run down from a hand-held fuel tank on one aircraft and placed into the usual fuel filler of the other. The first mid-air refueling, based on
19152-420: The range of 35–40% have been estimated for long-haul flights (including the fuel used during the tanker missions). Usually, the aircraft providing the fuel is specially designed for the task, although refueling pods may be fitted to existing aircraft designs in the case of "probe-and-drogue" systems. The cost of the refueling equipment on both tanker and receiver aircraft and the specialized aircraft handling of
19304-462: The receiver aircraft is topped-off with extra fuel in the air, air refueling can allow a takeoff with a greater payload which could be weapons, cargo, or personnel: the maximum takeoff weight is maintained by carrying less fuel and topping up once airborne. Aerial refueling has also been considered as a means to reduce fuel consumption on long-distance flights greater than 3,000 nautical miles (5,600 km; 3,500 mi). Potential fuel savings in
19456-430: The refueling valve to the end of the probe. This is so that if a large side or vertical load develops while in contact with the drogue, the rivets shear and the fuel valve breaks off, rather than the probe or receiver aircraft suffering structural damage. A so-called "broken probe" (actually a broken fuel valve, as described above) may happen if poor flying technique is used by the receiver pilot, or in turbulence. Sometimes
19608-655: The same flight, such as the KC-10, MPRS KC-135, or Airbus A330 MRTT. The development of the KC-97 and Boeing KC-135 Stratotankers was pushed by the Cold War requirement of the United States to be able to keep fleets of nuclear -armed B-47 Stratojet and B-52 Stratofortress strategic bombers airborne around-the-clock either to threaten retaliation against a Soviet strike for mutual assured destruction , or to bomb
19760-541: The same year, but these early experiments were not yet regarded as a practical proposition, and were generally dismissed as stunts. As the 1920s progressed, greater numbers of aviation enthusiasts vied to set new aerial long-distance records, using inflight air refueling. One such enthusiast, who would revolutionize aerial refueling was Sir Alan Cobham , member of the Royal Flying Corps in World War I , and
19912-624: The size of the load that can be conveyed and the design of the rolling stock. A strategy was adopted in 2004 to guide enhancements of loading gauges and in 2007 the freight route utilisation strategy was published. That identified a number of key routes where the loading gauge should be cleared to W10 standard and, where structures are being renewed, that W12 is the preferred standard. Height and width of containers that can be carried on GB gauges (height by width). Units as per source material. A Parliamentary committee headed by James Stansfeld then reported on 23 May 1892, "The evidence submitted to
20064-505: The subsequent abandoning of those railroads. The International Union of Railways (UIC) has developed a standard series of loading gauges named A, B, B+ and C. In the European Union , the UIC directives were supplanted by ERA Technical Specifications for Interoperability (TSI) of European Union in 2002, which has defined a number of recommendations to harmonize the train systems. The TSI Rolling Stock (2002/735/EC) has taken over
20216-678: The three main partners. The first production airframes were delivered to France and Germany from 1967. The first batch included 110 C-160D s for the German Air Force ( Luftwaffe ), 50 C-160F s for the French Air Force , and nine C-160Z s for the South African Air Force . Four C-160Fs were converted to C-160P air mail transport aircraft, and were operated by Air France . Production continued until October 1972. In July 1977, France placed an order for 25 aircraft to be built to an improved standard. Production work for
20368-404: The track being standard gauge , which is in line with much of the world. This often results in increased costs for purchasing new trainsets or locomotives as they must be specifically designed for the existing British network, rather than being purchased "off-the-shelf". For example, the new trains for HS2 have a 50% premium applied to the "classic compatible" sets that will be "compatible" with
20520-624: The transoceanic distances without aerial refueling, even with intermediate bases such as Hickam Air Force Base , Hawaii and Kadena Air Base , Okinawa. In addition to allowing the transport of the aircraft themselves, the cargo aircraft could also carry matériel , supplies, and personnel to Vietnam without landing to refuel. KC-135s were also frequently used for refueling of air combat missions from air bases in Thailand. The USAF SR-71 Blackbird strategic reconnaissance aircraft made frequent use of air-to-air refueling. Indeed, design considerations of
20672-459: The twin-engine configuration over four include reduced unit and production cost, lower weight and fuel consumption, simplified design and reliability. Each engine is equipped with an auxiliary generator system, providing the aircraft with both electricity and hydraulic pressure. An auxiliary power unit ( General Electric CJ610 ) is used to power the aircraft while on the ground, and for rare use in mid-air emergencies. An updated second generation of
20824-522: The two aircraft disconnect and the receiver aircraft departs the formation. When not in use, the boom is stored flush with the bottom of the tanker's fuselage to minimize drag. In the KC-97 and KC-135 the boom operator lies prone, while the operator is seated in the KC-10 , all viewing operations through a window at the tail. The KC-46 seats two operators at the front of the aircraft viewing camera video on 3D screens. The US Air Force fixed-wing aircraft use
20976-424: The two are not directly compatible, stairs may be required, which will increase loading times . Where long carriages are used at a curved platform, there will be gaps between the platform and the carriage door , causing risk. Problems increase where trains of several different loading gauges and train floor heights use (or even must pass without stopping at) the same platform. The size of load that can be carried on
21128-417: The type include kevlar armour, electronic warfare management systems, chaff/flare dispensers, missile approach warning systems and TCAS collision warning system. Extensive efforts have been made by both France and Germany to extend the aircraft's operating lifespan up to and if necessary beyond 55 years to 2018. In 2003–2004, Germany signed separate contracts with Terma A/S and Northrop Grumman to upgrade
21280-775: The utility of the technique on 25 October 1923, when a DH-4 flew from Sumas, Washington , on the Canada–United States border , to Tijuana, Mexico , landing in San Diego , using mid-air refuelings at Eugene, Oregon , and Sacramento, California . Similar trial demonstrations of mid-air refueling technique took place at the Royal Aircraft Establishment in England and by the Armée de l'Air in France in
21432-465: The valve is retained in the tanker drogue and prevents further refueling from that drogue until removed during ground maintenance. A "buddy store" or "buddy pod" is an external pod loaded on an aircraft hardpoint that contains a hose and drogue system (HDU). Buddy stores allow fighter / bomber aircraft to be reconfigured for "buddy tanking" other aircraft. This allows an air combat force without dedicated/specialized tanker support (for instance,
21584-525: The widespread structures built to loading gauge B on continental Europe. A few structures on the British Isles were extended to fit with GB+ as well, where the first lines to be rebuilt start at the Channel Tunnel . Owing to their historical legacies, many member states' railways do not conform to the TSI specification. For example, Britain 's role at the forefront of railway development in
21736-516: The wings. Subsequent programs carried out in the 1990s, such as LEDA III, concentrated on the whole structure of the aircraft; raising the airframe life from 8,000 flights to 12,000 flights, and introducing new avionics systems such as a self-defence system and a replacement flight management system. From 1994 to 1999, all French C-160s underwent an avionics upgrade and the addition of new anti-missile countermeasures. The C-160Fs and NGs so updated were redesignated C-160R ( Renové —"renovated"). In 2009,
21888-520: The world and often within a single railway system. Over time there has been a trend towards larger loading gauges and more standardization of gauges; some older lines have had their structure gauges enhanced by raising bridges, increasing the height and width of tunnels and making other necessary alterations. Containerisation and a trend towards larger shipping containers has led rail companies to increase structure gauges to compete effectively with road haulage. The term "loading gauge" can also refer to
22040-539: Was built by each of the production partners, with the first (built by Nord) flying on 25 February 1963, with the VFW and HFB-built prototypes following on 25 May 1963 and 19 February 1964. These were followed by six pre-production examples, stretched by 51 centimetres (20 in) compared with the prototypes, which flew between 1965 and 1966. Production orders were delayed by attempts by Lockheed to sell its C-130 Hercules transport to Germany; these attempts were rebuffed, and
22192-470: Was eventually modified by Airspeed to Cobham's specification, for a non-stop flight from London to India , using in-flight refueling to extend the plane's flight duration. Meanwhile, in 1929, a group of US Army Air Corps fliers, led by then Major Carl Spaatz , set an endurance record of over 150 hours with a Fokker C-2A named the Question Mark over Los Angeles. Between 11 June and 4 July 1930,
22344-417: Was mainly concerned about transatlantic flights for faster postal service between Europe and America. In 1931 W. Irving Glover, the second assistant postmaster, wrote an extensive article for Popular Mechanics concerning the challenges and the need for such a regular service. In his article he even mentioned the use of aerial refueling after takeoff as a possible solution. At Le Bourget Airport near Paris,
22496-686: Was originally built in 1901 to accommodate heavy rail transit cars of higher capacity than streetcars. The Red Line was opened in 1912, designed to handle what were for a time the largest underground transit cars in the world. The Los Angeles Metro Rail system is an amalgamation of two former constituent companies, the Los Angeles County Transportation Commission and the Southern California Rapid Transit District; both of those companies were responsible for planning
22648-416: Was publicly demonstrated for the first time in 1935. In the system the receiver aircraft, at one time an Airspeed Courier , trailed a steel cable which was then grappled by a line shot from the tanker, a Handley Page Type W10 . The line was then drawn back into the tanker where the receiver's cable was connected to the refueling hose. The receiver could then haul back in its cable bringing the hose to it. Once
22800-495: Was pumped. Some historic systems used for pioneering aerial refueling used the grappling method, where the tanker aircraft unreeled the fuel hose and the receiver aircraft would grapple the hose midair, reel it in and connect it so that fuel can be transferred either with the assistance of pumps or simply by gravity feed . This was the method used on the Question Mark endurance flight in 1929. The probe-and-drogue system
22952-473: Was so successful that in June orders went out to equip all new B-50s and subsequent bombers with receiving equipment. Two dedicated air refueling units were formed on 30 June 1948: the 43d Air Refueling Squadron at Davis-Monthan Air Force Base , Arizona , and the 509th Air Refueling Squadron at Walker Air Force Base , New Mexico . The first ARS aircraft used FRL's looped-hose refueling system, but testing with
23104-619: Was the first electrified railway line in Sweden and has limited height clearance (SE-B) because of snow shelters. On the rest of the network belonging to the Swedish Transport Administration ( Trafikverket ), the structure gauge accepts cars built to SE-A and thus accepts both cars built to UIC GA and GB. Some modern electric multiple units, like Regina X50 with derivatives, are somewhat wider than normally permitted by SE-A at 3.45 m (11 ft 4 in). This
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