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Îïèñàíèå: A Lockheed Martin F-35A-2B "Lightning II" "Joint Strike Fighter" (s/n 12-5056) (MSN AF067) flies alongside a General Dynamics (its aviation unit now part of Lockheed Martin) F-16C Block 42A "Fighting Falcon" (s/n 87-0360) June 25, 2015, at Luke Air Force Base. In October, F-35 and F-16 pilots began integrated training designed to improve mission cooperation and flight skills in both airframes. From Wikipedia, the free encyclopedia The Lockheed Martin F-35 Lightning II is a family of single-seat, single-engine, all-weather, stealth, fifth-generation, multirole combat aircraft, designed for ground-attack and air-superiority missions. It is built by Lockheed Martin and many subcontractors, including Northrop Grumman, Pratt & Whitney, and BAE Systems. The F-35 has three main models: the conventional takeoff and landing F-35A (CTOL), the short take-off and vertical-landing F-35B (STOVL), and the catapult-assisted take-off but arrested recovery, carrier-based F-35C (CATOBAR). The F-35 descends from the Lockheed Martin X-35, the design that was awarded the Joint Strike Fighter (JSF) program over the competing Boeing X-32. The official Lightning II name has proven deeply unpopular and USAF pilots have nicknamed it Panther, instead. The United States principally funds F-35 development, with additional funding from other NATO members and close U.S. allies, including the United Kingdom, Italy, Australia, Canada, Norway, Denmark, the Netherlands, and formerly Turkey. These funders generally receive subcontracts to manufacture components for the aircraft; for example, Turkey was the sole supplier of several F-35 parts until its removal from the program in July 2019. Several other countries have ordered, or are considering ordering, the aircraft. As the largest and most expensive military program ever, the F-35 became the subject of much scrutiny and criticism in the U.S. and in other countries. In 2013 and 2014, critics argued that the plane was "plagued with design flaws", with many blaming the procurement process in which Lockheed was allowed "to design, test, and produce the F-35 all at the same time," instead of identifying and fixing "defects before firing up its production line". By 2014, the program was "$163 billion over budget [and] seven years behind schedule". Critics also contend that the program's high sunk costs and political momentum make it "too big to kill". The F-35 first flew on 15 December 2006. In July 2015, the United States Marines declared its first squadron of F-35B fighters ready for deployment. However, the DOD-based durability testing indicated the service life of early-production F-35B aircraft is well under the expected 8,000 flight hours, and may be as low as 2,100 flight hours. Lot 9 and later aircraft include design changes but service life testing has yet to occur. The U.S. Air Force declared its first squadron of F-35As ready for deployment in August 2016. The U.S. Navy declared its first F-35Cs ready in February 2019. In 2018, the F-35 made its combat debut with the Israeli Air Force. The U.S. stated plan is to buy 2,663 F-35s, which will provide the bulk of the crewed tactical airpower of the U.S. Air Force, Navy, and Marine Corps in coming decades. Deliveries of the F-35 for the U.S. military are scheduled until 2037 with a projected service life up to 2070. Development F-35 development started in 1992 with the origins of the "Joint Strike Fighter" (JSF) program and was to culminate in full production by 2018. The X-35 first flew on 24 October 2000 and the F-35A on 15 December 2006. The F-35 was developed to replace most US fighter jets with the variants of a single design that would be common to all branches of the military. It was developed in co-operation with a number of foreign partners, and, unlike the F-22 Raptor, intended to be available for export. Three variants were designed: the F-35A (CTOL), the F-35B (STOVL), and the F-35C (CATOBAR). Despite being intended to share most of their parts to reduce costs and improve maintenance logistics, by 2017, the effective commonality was only 20%. The program received considerable criticism for cost overruns during development and for the total projected cost of the program over the lifetime of the jets. By 2017, the program was expected to cost $406.5 billion over its lifetime (i.e. until 2070) for acquisition of the jets, and an additional $1.1 trillion for operations and maintenance. A number of design deficiencies were alleged, such as: carrying a small internal payload; performance inferior to the aircraft being replaced, particularly the F-16; lack of safety in relying on a single engine; and flaws such as the vulnerability of the fuel tank to fire and the propensity for transonic roll-off (wing drop). The possible obsolescence of stealth technology was also criticized. Design Overview Although several experimental designs have been developed since the 1960s, such as the unsuccessful Rockwell XFV-12, the F-35B is to be the first operational supersonic STOVL stealth fighter. The single-engine F-35 resembles the larger twin-engined Lockheed Martin F-22 Raptor, drawing design elements from it. The exhaust duct design was inspired by the General Dynamics Model 200, proposed for a 1972 supersonic VTOL fighter requirement for the Sea Control Ship. Lockheed Martin has suggested that the F-35 could replace the USAF's F-15C/D fighters in the air-superiority role and the F-15E Strike Eagle in the ground-attack role. It has also stated the F-35 is intended to have close- and long-range air-to-air capability second only to that of the F-22 Raptor, and that the F-35 has an advantage over the F-22 in basing flexibility and possesses "advanced sensors and information fusion". Testifying before the House Appropriations Committee on 25 March 2009, acquisition deputy to the assistant secretary of the Air Force, Lt. Gen. Mark D. "Shack" Shackelford, stated that the F-35 is designed to be America's "premier surface-to-air missile killer, and is uniquely equipped for this mission with cutting-edge processing power, synthetic aperture radar integration techniques, and advanced target recognition". Improvements Ostensible improvements over past-generation fighter aircraft include: Durable, low-maintenance stealth technology, using structural fiber mat instead of the high-maintenance coatings of legacy stealth platforms. Integrated avionics and sensor fusion that combine information from off- and on-board sensors to increase the pilot's situational awareness and improve target identification and weapon delivery, and to relay information quickly to other command and control (C2) nodes. High-speed data networking including IEEE 1394b and Fibre Channel (Fibre Channel is also used on Boeing's Super Hornet. The Autonomic Logistics Global Sustainment, Autonomic Logistics Information System (ALIS), and Computerized maintenance management system to help ensure the aircraft can remain operational with minimal maintenance manpower The Pentagon has moved to open up the competitive bidding by other companies. This was after Lockheed Martin stated that instead of costing 20% less than the F-16 per flight hour, the F-35 would actually cost 12% more. Though the ALGS is intended to reduce maintenance costs, the company disagrees with including the cost of this system in the aircraft ownership calculations. The USMC has implemented a workaround for a cyber vulnerability in the system. The ALIS system currently requires a shipping-container load of servers to run, but Lockheed is working on a more portable version to support the Marines' expeditionary operations. Electro-hydrostatic actuators run by a power-by-wire flight-control system. A modern and updated flight simulator, which may be used for a greater fraction of pilot training to reduce the costly flight hours of the actual aircraft. Lightweight, powerful lithium-ion batteries to provide power to run the control surfaces in an emergency. Structural composites in the F-35 are 35% of the airframe weight (up from 25% in the F-22). The majority of these are bismaleimide and composite epoxy materials. The F-35 will be the first mass-produced aircraft to include structural nanocomposites, namely carbon nanotube-reinforced epoxy. Experience of the F-22's problems with corrosion led to the F-35 using a gap filler that causes less galvanic corrosion to the airframe's skin, designed with fewer gaps requiring filler and implementing better drainage. The relatively short 35-foot wingspan of the A and B variants is set by the F-35B's requirement to fit inside the Navy's current amphibious assault ship parking area and elevators; the F-35C's longer wing is considered to be more fuel efficient. Costs A U.S. Navy study found that the F-35 will cost 30 to 40% more to maintain than current jet fighters, not accounting for inflation over the F-35's operational lifetime. A Pentagon study concluded a $1 trillion maintenance cost for the entire fleet over its lifespan, not accounting for inflation. The F-35 program office found that as of January 2014, costs for the F-35 fleet over a 53-year lifecycle was $857 billion. Costs for the fighter have been dropping and accounted for the 22 percent life cycle drop since 2010. Lockheed stated that by 2019, pricing for the fifth-generation aircraft will be less than fourth-generation fighters. An F-35A in 2019 is expected to cost $85 million per unit complete with engines and full mission systems, inflation adjusted from $75 million in December 2013. ................................................................................................... Before getting into A, B, and C differences for the F-35, a short primer on how to tell an F-35 from an F-22 may help avoid an even larger fighter faux pas. After all, the F-22 and F-35 look similar as well, especially from certain angles and at a distance. Both the F-22 and F-35 have two intakes, two tails, and similar planforms. If the two aircraft happen to be parked together, the F-22, however, is noticeably larger. The Raptor is about ten feet longer than a Lightning II. Its wingspan is about ten feet wider than an F-35A’s and F-35B’s, and roughly the same as an F-35C’s. From behind, the twin, rectangular thrust-vectoring exhaust nozzles on the F-22 are an obvious difference. The F-35 has one round exhaust nozzle for its single engine. The geometry of the engine intakes distinguishes the two aircraft from the top and side. The Raptor’s intakes angle back. On the Lightning II, they point forward. Intake differences are visible from the front view as well. Opposing sides of the F-22’s intakes are parallel. The corners are slightly rounded. The F-35’s intake angles are sharper. A space between the intake and the fuselage, called a diverter, is found only on the Raptor as well. The F-35’s diverterless intake sits flush to the fuselage. The single- vs. twin-engine difference plays out on the top sides of the two aircraft as well. The F-22 has two humps between the tails. The F-35 has just one. On the underside, the F-22 is much flatter with one main (though split) weapon bay with two doors. The F-35 is more rounded and has two distinct main weapon bays each with two doors. Taxiing, the F-22 sits about a foot lower than an F-35. Context also matters. If the airplane in question is operating from an aircraft carrier, landing vertically, taking off in a very short distance, or displaying non-USAF markings, it’s not an F-22. Context And The F-35 Variants When it comes to distinguishing among F-35 variants, context can provide some tips as well. If the F-35 in question is being catapulted from a carrier, it’s an F-35C. If it’s landing vertically, it’s an F-35B. If it has Royal Air Force markings, it’s an F-35B. If it has international markings that aren’t associated with the RAF, it’s an F-35A (at least until another international air force procures B or C models). Basic A, B, & C Differences The A model is most easily distinguished from other F-35 models by the blister on the upper left side for its internal GAU-22/A Gatling-type gun. (B and C models do not have internal guns.) Like the B model, the F-35A has a smaller wing. The A model is the only F-35 variant with a refueling receptacle on its dorsal spine. The receptacle markings are clearly visible from the top view. The B model is most easily distinguished from other F-35 models by its vertical lift system. The system comes into play at almost every viewing angle of the aircraft. Even in up-and-away (non vertical) flight, the F-35B has visual clues for the vertical lift system. The lift fan door flattens the upper surface of the F-35 just behind the cockpit, giving this model a distinctive hump. The hump is especially noticeable from front and side perspectives. The lift fan itself abbreviates the aft end of the canopy line as well. Panel lines and markings are associated with the lift system are visible on the top and bottom sides of the F-35B. From above, panel lines for the lift fan door and the auxiliary air inlet are visible. From below, the doors for lift fan exhaust appear just behind the front landing gear doors. The aft end of the lower fuselage also has a seam for the doors that open when the three-bearing swivel duct goes into action in STOVL mode. (The A and C models have a hump in this location where their arresting/barricade tailhooks are stored.) The B model also has a diamond-shaped roll duct on the underside of each wing. The C model is most easily distinguished from other F-35 models by its larger wing, which provides almost fifty percent more wing area than the A and B models. The hinge line for the wing fold is visible from top and bottom views. The F-35C wing has an additional control surfaces, called ailerons, on the trailing edge as well (two control surfaces on each wing instead of one). The inner control surfaces on the F-35C wing and the ones on the A and B are called flaperons. The landing gear on the F-35C is noticeable beefier. The nose gear has two tires and a launch bar that extends forward and upward from the wheels. Another Trick: Markings Markings can also be used to distinguish F-35 variants. US Air Force markings equate to the A model. US Marines to the B or C model. (The Marine Corps is purchasing eighty C models.) And US Navy to the C model only. The Air Force puts the aircraft identification number, or serial number, on the tail (F-35A). The US Marines and Navy put their identification numbers, called Bureau numbers, on the empennage just below the horizontal tails. To make identification somewhat easier, the F-35 variant designation appears just above the bureau number for the US Marine Corps and Navy. Unfortunately, because of their location these markings are not apparent in most photos. International operators have their own specific requirements for markings. Other Notes As noted in a previous Code One article, Norwegian F-35s will be distinguishable by a small, aerodynamically clean bump on the upper fuselage between the two vertical tails. The bump contains a dragchute. Nosebooms are peculiar to flight test F-35s dedicated to flight sciences testing. The major differences between the X-35 demonstrator aircraft, which are no longer flying, and F-35 were covered in another previous Code One article. Basic Cheat Sheet The F-35A has a small wing, full canopy, gun blister on the left upper side, and aerial refueling receptacle markings on its dorsal. It has no panel lines or markings associated with a STOVL lift system. The F-35B has a small wing, distinctive fuselage hump and abbreviated canopy (thanks to the lift fan), refueling probe on the right side, and numerous markings, panel lines, and actual hardware associated with its vertical lift system. The F-35C has the big wing, wing folds, ailerons, full canopy, refueling probe on the right side, and a launch bar and two tires on the front landing gear. If the aircraft has Navy markings, it’s an F-35C.

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