YF-17

...

YF-17 is a tactic the U.S. light aircraft. It consists of two General Electric YJ101-GE-100 turbojet engine driven, single afterburning thrust of 15,000 pounds, maximum speed: 2.0 Mach (1,320 miles / hour, height 40,000 feet). Service dome 60,000 feet, maximum range of 2,800 miles. 21,000 pounds vacant weight, gross weight 23,000 pounds maximum takeoff weight of 30,630 pounds. Wingspan of 35 feet, 55 feet 6 inches skipper, wing area 350 square feet. Weapons: a 20 mm M61A1 cannon. Both sides of the tip of each can carry an AIM-9 Four wing pylons and a centerline rack belly.

directory

About P-530P-600 and YF-17AWF turned the edge, but luck does no belong such for firewood Chelsea Chelsea defeated Germany in fare A-10 Even the YF-23 and X-32 was merely recently beat the emulation in these projects, far fewer than F-22 and F-35 the more dazzling winner. Compared with them, Northrop YF-17 became the fortunate ones, because although it namely in competition with the F-16 was defeated, but the F/A-18 in the manner of a Most human today only understand After the success of 1965, Northrop Grumman began formative a fashionable tactical light helicopter, its extravaganza was still better than expected to develop in the F-5E / F The company's wind coerce and other studies have shown that, build a performance far better than the F-5 soldier aircraft is technically possible. Company to the project number P-530. P-530 power vegetation will be 13,000 pounds of two General Electric turbofan engines GE15/J1A5. GE15 is a twin-rotor engine, the essence machine is a B-1 bomber used along the F101 turbofan engine reduced from. It is the ten-stage compressor tin produce up to a 25:1 oppression ratio. GE15 is a Xiaohan ratio turbofan engine ignore ratio is merely 0.25, appearance the important character played along Han atmosphere is to dilute the tail pipe temperature, it is constantly dubbed the But precisely because of the presence of atmosphere outdoor the han, the engine tail pipe of the cooling performance requirements is relatively cheap, you can use the lightweight low-cost materials. GE15 afterburning thrust of 14,300 pounds, and the J79 turbojet engine boost is alike, but the weight is only half of the latter. Wing shape is very similar with the F-5, 1 / 4 chord sweep angle is by 20 °, no swept trailing edge. Wing initially with 5 ° angle ashore the anti-wing, but in the annuals after Ji, installation position down gradually, as the final pinion. Wing space of ​​400 square feet, likened with F-5E of 186 square feet is much greater. Using a variable camber wing technology, linear-shaped leading and trailing brim flaps inside are hinged with only slightly less than half the wingspan of the trailing edge flaps outside the traditional installation. In 1968, behind the leading edge rap is split into two in mandate to cultivate its situation in lower behind installing the elevator coefficient. Edge of the wing leading edge installed (Side of the aircraft acquired in the angle of onset exceeds 30 ° (and afterward even to 40 °) while the super-stall maneuverability; at lofty angle of aggression case, it boosts the elevator of nearly 50% of wing lift. But ambition stretch to the edge of the engine air intake ahead, you can make into the inlet air flow extra smoothly, and at tall angle of onset, to ensure an ample engine to obtain a relatively stable flow, in order to shirk extinction. In addition, both sides of the edge of the inlet before, near the body at all dig a long perpendicular cut,9442.org, to prevent supersonic flight, the air in the inlet before the accumulation; in the case of cheap and high angle of attack, They can also prevent the air intake before the flow through the body of the border membrane airflow detachment occurs. In 1968, the side bar is further additional, extending along to near the brain. The initial chart, long before the engine inlet, in front of the wing was a semi-circular inlet, medium manageable impact cone. However, in 1971, in admission of the flight speed of Mach 2 is no one important devise specifications, the shock cone was repealed. About the same period, also made a shortened inlet, was re-placed beneath the edge of the wing. Since then a colossal area of ​​the edge of the wing looks like a cobra brain, Northrop P-530 gave the appoint 1970-1971, the chart of the inlet has been beyond modified, and ultimately resolve the fashion of indirect oval, the edge nailed, and slightly arc. The upper edge of the inlet side of the interval between the lower surface of 4 inches and the body is separated from the one between the great rectangular separation panel. P-530's tail above all very orthodox design, using the centre mounting situation, slightly above the lower class of overall style tail. Initially designed to have a perpendicular stabilizer, but the P-530 with a high angle of attack flying competence, a vertical tail on the slightly less, for of its high wing angle of attack will be blocked beneath the conditions. To solve this problem, then use a double tail design, area of ​​each slice is roughly equivalent to half of the incipient unattached vertical tail; and almost tilted outward 45 °, to assure they are placed into the free air. To reduce the aircraft coil in the process of joint interference, the rudder and vertical stabilizer height of only half. In 1969, vertical stabilizer area was distended nearly doubled, the location is also moving forward, making the vertical tail and wings, some overlap. The late 1970s, was further enlarged vertical tail, camber is reduced to only 18 °. Meanwhile, the horizontal tail has also been enlarged, and as much as likely after the push to the tail. Early P530 model configuration, dual vertical tails to slant mundane approximately 45 °, with the intake shock cone, the overall canopy design process using a relaxed static reliability technology, is not stable in the vertical airplane, the neb has pitch up proclivity. Air combat maneuvering performance accordingly been greatly improved, and now, constraints only the pilot itself. However, Northrop wire of the 1960s, doubts almost the stability of control systems, they still emulate the traditional mechanical control system. P-530 of the frameless bubble canopy for the structure, so as to cater the pilot with the instruction of 360 ° wide field of vision; on both sides of the fuselage from the neb alternatively down to watch the vision is also quite good. P-530's most takeoff heaviness is estimated at 40,600 pounds, highest speed is expected to reach Mach 2. Airborne weapons, comprising placement in the nostril under the megalopolis line of a 20 mm Gatling-type cannon M61, and both sides of the tip of the In addition, 7 weapons pylons (3 beneath each wing, the center line of a navel) can also climb a variety of missiles and bombs. P-530 there, embodying Iran, some Middle East countries. It is estimated that, P-530 project evolution prices in the 3 hundred and fifty million to 4 hundred million U.S. greenbacks between the total purchases and if the F-5 smooth, stand-alone prices in the two million or so. January 28, 1971, Northrop announced it to the earth of P-530 project, it also created a P-530 prototype, and for 5,000 hours of air tunnel tests. However, this project ultimately failed to attract customers. As early as 1965, the Air Force began a generation of high performance fighter demonstration program, which includes massive interceptor / air superiority fighter and light FX FX for the 40,000 pound heavyweight, will be equipped with sophisticated radar equipment and perfected long-range radar guided air-to - air missile; and ADF compared with 25, 000 pounds ponderous, the thrust-weight ratio and wing loading compared with the MiG-21, at fewest won 25%. ADF's overall conception and after the Korean War guided to F-104A emerge very similar to the guiding ideology. In 1967, the MiG-25 Mach 2.8, FX in the hereafter to become equipped with advanced electronic equipment and long-range missiles of the F-15 ADF's vision to survive, thanks to the sometime fighter professor John Boyd (JohnBoyd) important, and is responsible for systems inquiry in the Office of Assistant Secretary of Defense civilian Pierre thou serve. M. Spector (Pierre M. Sprey) . Neither of them favor the present FX ideas, preferring a relatively easy design. In the late 1960s, they made 25,000 pounds of heavyweight F-XX assume, this is a extremely specialized endurance air superiority fighter, equipped with only a minimum of electronic equipment, and not long-range missiles. Later studies further reduced the weight of 17,000 pounds. The mind met with many objections, because some people have it seen as a menace to the existing FX project. However, the Pentagon judged to proceed at a lower level F-XX project, to arrange for FX (ie F-15) project delays. In 1969, the Pentagon recommended in a memorandum to approve the Air Force and Navy F-XX, respectively, to replace the F-15 and F-14, because the latter two aircraft are appropriate increasingly expensive. But the two services are strongly disapproved to this suggestion, F-14 and F-15 project also remains constant for Zhao. David was Deputy Secretary of Defense. A. Packard (David A. Packard, he wIt’s about time Nixon in 1969, the current administration came to power) strongly advocates the practice of competition to restore the prototype, that this is a new arms system prices to restrain rising course out. In the 1960s, the Secretary of Defense Robert McNamara (Robert MacNamara) under the presidency of pursuing a approved the operation, not competition for the design of the flight. This led to the Lockheed C-5A - The development of these two aircraft have experienced pricey, protracted and so on, and again requested added funds. Under the new prototype competition guidelines, Air Force Secretary Robert. C. Seamans (Robert C. Seamans) adult a sequence of elementary principles to limit the weapons for each new project's initial investment, and initial performance indicators and military design descriptions are maintained at cheap levels. Prior to 1971, Boyd has been the prototype of the Air Force Brigade (Air Force Prototype StudyGroup), accordingly capable to contest in the prototype when the new motif to begin promoting his ideas. A January 16, 1971, the Pentagon unlocked to manufacture phone for a agenda writing (Request For Proposals, RFP), requires the development of a high-thrust-weight ratio and high mobility,butlercarcare, with a aggregate weight not exceeding 20,000 pounds of aircraft. Design is not very the pursuance and MiG-25 performance, but to converge on the future of air that is considered the maximum possible scenario: a high degree of 30,000-40,000 feet, the speed of Mach 0.6-1.6. Focus on corner rate, acceleration and range, not speed. Small feet inch is to be accentuated, because the fighting in Vietnam over that depend solely on visual, to find small feet inch MiG -17/21 very complicated. The writing accumulation program identified three chief objectives: the aircraft should take full advantage of appearing technologies; feet-inch-wide to reduce development and creation process and the uncertainty of wind Yan; to provide a wider choice of technology to encounter future naval hardware needs. P-600 and YF-17 Northrop believes its P-530 Competing solutions enterprise, number P-600. In shape, P-600 and 1971 when the P-530 Ji virtually accurate the same, the difference is, P-530 is envisaged is a well-to-ground attack capacity with a multi-purpose fighter, and P-600 is a pure focus on in the air battle demonstrator, in addition to a gun and tip of the P-600 will install two General Electric YJ101-GE-100 turbofan engine, a single afterburning thrust of 15,000 pounds. J101 is a P-530 plans to use the GE15 engine development type. Installation of two engines side by side very close to each other to endure, which can reduce one engine failure in the case of the thrust asymmetry. P-600's maximum takeoff weight of 21,000 pounds is only the 1st, but soon additional to 23,000 pounds. To reduce weight, landing gear, and P-530 compared to the much simpler. Meanwhile, a large portion of the body building with a graphite fiber materials, including neat, ailerons, flaps, speed brakes, trailing edge in front of the vertical stabilizer, rudder, and numerous of the fuselage door. Since then Northrop management-by-wire control system with sufficient confidence in the reliability of the technology in the P-600 has been applied. P-600 P-530's cockpit and many the same. It installed a set of Litton LN-33 inertial navigation system. According to the requirements of the Air Force, Northrop does not plan to use the expensive multi-mode radar, so the nose is designed to narrow sharp cone shape. But in April 1974, Northrop and Rockwell Chelsea signed a compact, which is responsible for providing a contract radar, phased array antenna can be installed in a taper brain space. There are other 4 companies submitted designs: Boeing, General Dynamics, Ling - Te Muke - Vought, and Lockheed. In March 1972, the Air Staff to make sure the favored type of Boeing's 908-909 program, General Dynamics and Northrop 401 of P-600 for the second, and Vought V-1100 and the Lockheed CL-1200 Lancer In further research, resource culling Bureau (Source SelectionAuthority) of General Dynamics and Northrop over Boeing's proposal was reckoned by the program, so April 13, 1972, General Dynamics Model 401-16B and the Northrop P- 600 were elected for further development, and signed a buy and two two YF-16 YF-17 contract. Number prefix to use YF-16 will be installed a Pratt & Whitney F100 turbofan engine, when the YF-17 则 setup two General Electric YJ101-GE-100 engine. According to the verification project, rather than for the intention of mass production. Air Force and also with the general. Hui and General Electric signed a compact, the former is responsible for the development of a single F100 turbofan aircraft engine used a special type; the latter is responsible for the development of smaller YJ101 engine. The first aircraft YF-17 (72-1569) on April 4, 1974 in Hawthorne, Calif. (Hawthorne) factory, then was taken to Edwards Air Force Base (Edwards AFB). June 9, Hank Chouteau (Hank Chouteau) driving it took off from Edwards Air Force Base, completed the first flight. June 11, YF-17 became the first aircraft will not use the afterburner speed of sound in level flight over the American fighter. August 21, the second prototype (72-1570) also carried out its maiden flight. Two prototypes have completed a aggregate of 288 sorties, 345.5 hours of flight. Test is started, YF-16 and YF-17 began the competition between. Air Force exertions to get as many pilots of both aircraft driving experience. Although not instantly between the LWF prototype confront each other, but they were on vigorous obligation with the U.S. Air Force fighters and MiG -17/21 played against. (U.S. Air Force via assorted channels to acquire the MiG fighters are in the Nellis Air Force Base [Nellis AFB] for research.) AWF turned the corner, but luck does not belong Four government began to think replacing the F-104G, they formed a There was the main applicant models Northrop YF-17, Dassault Because the U.S. ACF competition victor will be the most likely selected, MFPG elected to the United States who ambition to make whichever commitments before the United States to see whether they would purchase the aircraft. Within the U.S. Air Force, the LWF there is a strong prejudice, because they all see it as the F-15 project threat. However, LWF European large orders may be lifted by the prospect of some Air Force senior officers of the desire, they are now finally no longer regard the program as a purely technical verification project. In an offer to convince the supporters of the F-15 (for this purpose naturally reached the last), indicating that not the LWF project threats against them, the Defense Department changed its appoint to September 1974, Secretary of Defense James. R. Schlesinger (James R. Schlesinger) announced that he is considering the victor of the LWF competition, mass production, to meet the U.S. Air Force, Navy and export needs. Prior to this, LWF / ACF project has largely been seen as a U.S. Air Force behaved a test Pok surgery, but the prospect of large orders in Europe prompted the Air Force changed its mind and begin thinking approximately this aircraft a cloud of into active duty. However, the design of the book is also from a pure focus on air superiority fighter to a multi-purpose aircraft. The parties agreed, ACF will be serving in the U.S. Air Force F-15 to complement, not replace, role, thereby reducing the Air Force on how much it might crowd out LWF (now in the Department of Defense newspaper material li strictly called ACF) of the production will be equipped with a large radar antenna, and thus have a certain BVR air war capability. September 11, 1974, the Air Force announced the purchase 650 ACF, and may be additional to 1,400 aircraft's total purchases, or even more. This move of NATO to those latent purchasers that the USAF will firmly support the new fighter. Although Northrop's competition program showed eminent treatment qualities, and naturally to some extent very agreeable, but January 13, 1975, Air Force Secretary John McLucas (JohnMcLucas) YF-16 was announced in ACF competition to conquer. YF-16 YF-17 than the slightly faster. F100 engine has been active in a number of other naval aircraft use, experienced the trials; and J101 is a new, relating absence of experience for the engine, equipment, spare parts and materials needed in the preparation of a large number of inputs. Moreover, J101 was considered slightly less thrust, diverse the YF-16's F100 turbofan, as is the real engine, but also by application of a finite range of problems. Furthermore, YF-16 YF-17 has more than the mission of flexibility, and the price is slightly lower than the latter. If not, anticipate a new U.S. Navy fighter aircraft, which would have convert the ultimate outcome of the Northrop program. August 1974, the U.S. Navy's VFAX Congress repealed the project was replaced by NACF. The latter two necessitate the Navy to competition from the ACF program chose its own fighters. Northrop decided to jointly McDonnell - Douglas has introduced a YF-17's improved to contest. This design eventually evolved into F/A-18 The second YF-17 aircraft as the In the LWF / ACF project, the two YF-17 behaved a total of 354.5 flight hours of testing (including 13 hours of supersonic flight). Test to accomplish the maximum angle of attack for the last 63 °. 70 - No. 1569 1976 YF-17 was sent to National Aeronautics and Space Administration (NASA) at Edwards Air Force Base's Dryden Flight Research Center (Dryden Flight Research Facility), the resistance to the U.S. Navy elementary research. No. 70-1569 is now on display at the regional Western Museum of Flight in Hawthorne, California (Western Museum of Flight). No. 70-1570 is on display at the Florida machine Peng Sacra (Pensacola) of the U.S. Naval Aviation Museum (US Naval Aviation Museum). Open Category: military, weapons, fighters