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The Boeing 757

I

The increased demand on existing routes Boeing 727, often eclipsed even the capacity of the stretched, -200 series versions, along with advanced technology, dictated the need for a larger version of this venerable tri-jet or a completely new design.

The first attempt adopting the first approach, had offered a sufficiently extended fuselage to accommodate 189 passengers and three refanned, higher capacity Pratt & Whitney JT8D-217 engines each developing 20,000 pounds of thrust. Designated the 727-300B, which first appeared in the 1975 Paris Air Show as a model. Despite the interest Initial United Airlines, the companies felt it needed more quiet, more advanced power plants.

A fundamental redesign, keep the nose of 727, the interest of the fuselage and tail-T, and designated "7N7", introduced a new fuselage and a wing of new technology, cross- like the much smaller 737, two engines mounted on pylons, of which Pratt & Whitney JT10D 4 – RB.211-535 Rolls Royce and General Electric CF6-32 had been then considered. Although planned, like its counterpart inceptional, for one-stop transcontinental sectors, its wing contained sufficient fuel tank for the eventual deployment of long range.

Due to the wide-body comfort has been well received by passengers on intercontinental routes, iteration had briefly explored a wider fuselage cross-section of twin-aisle 180 passenger accommodation. The concept has served two needs: 1). Should be offering greater convenience, and therefore are more competitive with the then pending A-300 Airbus Industrie in the areas of U.S. relatively short procedure, and 2). It would have avoided the fuselage too long to respond to any increase in capacity in the future, bypassing the requirement for long landing gear struts to maintain proper takeoff angles of rotation.

The width provided, however, was too much of a reward for these advantages, as demonstrated by the airline interest weak, since the weight and resistance associated with a second hall and the day just one more seat had been very complicated, and its cross section, although larger than the 7N7, it was too narrow to accept the standard LD-3 luggage and cargo containers.

Returning to his studies of narrow body, Boeing proposed an advanced, high-capacity, 727 in February 1978, had offered his nose, cockpit and fuselage cross section, but has introduced a new wing and two turbofans a complement of 170 passengers, which used much of the community of developed simultaneously, twin-aisle design 7X7. new "757", that would be the fifth major Boeing commercial aircraft to carry seven sequence numbers board and seven models after the 707, 727, 737, and 747, all but the last of which had been narrow bodies.

Compared to the 727 that had been intended to replace, which had offered a consumer fuel of 15 per cent lower, however, the wing surface inherently fostered significant weight range, and increases the ability of all derivatives in the future.

In order to reduce development costs associated with their 767, the widebody, twin-aisle, twin-engine counterpart also intended initially for routes intercontinental-stop, Boeing, where feasible, incorporated in maximum common in both aircraft types for both sections share forward same nose, windshield, wheels of four units of main landing gear, avionics and cockpit systems. Indeed, the two planes, forming a new generation advanced technologies twinjets narrow and widebody aircraft, which would provide a common type rating, increase mixed fleet flying companies that operated both types, and even the originally planned 727-style t-tail had been removed in favor of the 767 conventional, low-wing configuration at the end of the design phase, resulting in better agreement with the 767 of the 727 was designed to replace.

launch orders for 21 firm and 24 options and 18 options signature of 19, were placed respectively by Eastern Airlines and British Airways on August 13, 1978, Rolls Royce jet-535C RB.211 power. With a capacity of 196 passengers one of six deep, seat configuration 34-inch pitch, the 757, with a total weight of 220,000 pounds, is optimized for the sectors of 2,000 nautical miles, while an optional, 230,000 pounds would be to increase the range of 2,500 miles.

Structural weight reductions, which reduced costs per seat-mile, was achieved advanced composites and aluminum alloy construction, the ex-reinforced plastic composite carbon fiber used in the engine hood, spoilers, spoilers, elevators, and rudder, and kevlar-reinforced plastics used in the engine cowling and the wing of the tower and stabilizer tip fairing. zinc, copper and aluminum alloys is used on the skin of the wing spars and lower stringer beams. The alloy, which offers increased strength of between five and 13 percent, in combination with the compounds reduce structural weight by 2,000 pounds and resulted in an average annual fuel savings per aircraft of 30,000 U.S. gallons based on a utilization rate of 1,400 1000 nautical miles sectors.

The aircraft, in its original version 757-200, displayed an overall length of 155.3 meters in height.

The aluminum alloy Two wing mast, whose central section passes continuously through the fuselage, providing a period of 124.10 meters, an area of 1,994 square meters and five percent of dihedral, and shared a high degree of agreement with the one designed for the 767, the aft-loaded profile delay drag rise Mach. But it was thinner at its point of attachment of the root to the fuselage and offered 25 compared with 32.5 percent of sweepback. Your drag than had traditionally been offset by their profiles As standard the proposed mission, which, by its shorter duration, involving higher rates of rise and decline cycles. He had a 7.82 aspect ratio, or the relationship between the length and width.

Completely lift span was increased in five main sections edge slats and flaps final double slot edge, while the roll control was provided by al-speed, outboard flaps, assisted by spoilers in five sections. Alternatively, it could be implemented as speedbrakes in flight or pick up skips on the floor, where two spoiler interior panels could also be used.

Power provided by two high-bypass turbofans relationship tower mounted to the underside of the wing tip, and diameter would not have been possible with the 727 aft fuselage facility agreement, resulted in bending relief movement.

The Rolls Royce RB.211-535C, fan trimmed version of the 42,000 pounds of thrust-22B RB.211 developed for the Lockheed TriStar L-1011 pod construction workers to reduce weight compounds and first ran on the 757 on 23 January 1982. The three axles, 37,400 lbs thrust engine was chosen by This launch customers and British Airways.

The more advanced RB.211-535E4, incorporating all the chord fan blades, high pressure module increases and a common exhaust nozzle for the fan and core streams, offering a fuel reduction of eight per cent in cruise mode and an increased ratio four-point pressure of 23:1 to 27:1 on its predecessor-535C. The engine thrust of 40,100 pounds was certified on November 30, 1983 and flew for the first time 757 prototype in February next year.

The Pratt and Whitney PW2037, originally specified by American Airlines and Delta, had been the second of the aircraft, and others only, powerplant. JT10D initially appointed, the two axes turbofan, designed as an engine inceptionally 26,700 pounds of thrust when the program was launched in February 1972, had become the current turbofan 37,000 pounds of thrust high pressure compressor efficiency was improved with a smaller compressor, higher speeds with the main rotation. First flight of the prototype 757 in March 1984, it recalled 37,600 pounds of thrust for takeoff and had a relationship 5.8:1 bypass. The production version that offers a thrust capacity of 38,200 pounds, while higher gross weight of the lead aircraft, alternatively, could be boosted by 41,700 pounds of thrust PW2040s.

Fuel was carried in two integral wing tank and a central section, with which it is stored in the external tanks burned last time in order to maintain the relief wing bending motion. Capacity was 11,253 U.S. gallons.

The conventional tail plane, low-wing, passed late in the development agenda of the Boeing 757, has facilitated a reduction in the total length of 18 feet, yet resulted in a longer cabin that of the 727 it replaces and improves handling of the soil. The incidence variable, horizontal stabilizer lift equipped, completely hand built, light boxes pair of alloy had an area of 542 square-feet, while the vertical structure, consisting of a three-pole, double cell, light box pair of alloy, covered an area 370 square meters.

The tricycle landing gear featured a dual-wheel nose gear retracting into the strut and two of four wheels, side-retractable units compound Goodrich Dunlop or wheels, carbon brakes, and tires.

The cabin appears as standard operating two crew members and one observer's seat, while the cabin, at 118.5 meters long, 11.7 meters wide and seven feet tall, had a look sported large widebody, Kevlar, individually closed upper storage compartments, a carved ceiling, recessed lights seats, molded walls, and extra. Kitchen, bathroom, closet and the number and location varies depending on customer preference, but it could be installed forward, aft or midships.

Numerous class, tone and density seating arrangements, again according to customer's choice, were available. A 178-passenger complement, for instance, is 16 first class seats in one of four in background, two-two configuration in a field of 38-inches and 162 economy class seats on a six-abreast, three-three, under a field of 34-inches, while that 208 passengers could be accommodated in a class of 12 first and 196 economy class configuration, the latter in a tone of 32 inches. single class, high density and organized tour and charter densities at least 29-inch spaces, covered 214, 220, 234, and 239 passengers, the latter of which exceeded the maximum 727-200 50 passengers and undercut the 767-200 wide-body aircraft by an equal number.

Cabin access was provided by any of the three major passenger and two service doors and emergency exits on either side wings or four major passenger and service doors on each side.

The two under-floor cargo wineries, visited by starboard doors below deck, which offers 700 cubic feet of space in the front compartment and 1090 cubic feet in the stern.

Boeing 757 systems include Honeywell-Vickers hydraulic pumps and hydraulic motors powered by four electric pumps Abex. An Allied-Signal GTCP331-200 auxiliary power unit (APU), providing ground power for air conditioning, lighting and start the engine.

Full program approval had been received in March 1979 and final assembly, like all previous narrow body aircraft, took place in Renton, Washington, with the first metal cut on December 10 and then first on the main assembly place 13 months, in January 1981.

First released on January 13, 1982, or five months after its 767 wide-body counterparts, and taking to the skies for the first time on 19 February, 757-200 prototype (N757A) was flown by test pilot John Armstrong and powered by turbofans Thrust 37,400 pounds RB.211-535C, completing a successful two hours, exit opening 31 minutes, during which he had reached 250 knots indicated airspeed (IAS) before landing at Paine Field Boeing 'Center Flight Test in Everett. Despite having introduced the first CRT display equipped cabin for two people, and having been the first design of Boeing have started with a guy foreign motor has demonstrated a simple management features.

The five aircraft in the flight test program ultimately revealed that compared with the original design of 1979, the specifications, which had an operating weight 3650 lbs lowest at 200 nm increased capacity wide, and fuel burned three percent less.

Certified by the FAA on December 21, 1982, the 757-200, the longest solo-aisle Boeing bioreactor, entered regular passenger service with Eastern Airlines on January 1 following the Atlanta-Tampa and Atlanta-Miami route, while British Airways, the configuration of their planes for 12 first and 174 economy class seats, was the type on 25 January and was inaugurated into service on 9 February, London-Heathrow to Belfast, Northern Ireland.

The first alternative power Pratt and Whitney PW2037, first flight on March 14, 1984, were delivered to launch customer Delta Air Lines seven months later, in October, the same month that Eastern received his first example, improved engine, equipped with RB.211-535E4.

Thus engaged, the plane, with 186 mixed-class passengers had 220,000 pounds maximum gross weight and landing weight of 198,000 pounds maximum offering range capability matching 2820 miles, although the medium-range versions had a weight of 230,000 pounds and appears far-reaching examples of gross weight of 250,000 pounds, the areas in which case it could be flown 3820 miles.

Despite maturing DC-9, 727, 737 and routes had dictated the need of 757 Conceptually, gross weight increase and therefore range capability, allowing more time, trans-and deployment intercontinental sector, partly in response to rising fuel prices, and served often, if not replaced, 767-200 services, thus complementing before to usurp its twin-aisle counterpart. Delta and Eastern, for example, operate segments of its transcontinental centers in Atlanta, while this pattern mimicked USAir to Los Angeles and San Francisco flight from its base like Pittsburgh. Ladeco intercontinental service operated from Santiago, Chile, to Miami and New York, and Canada 3000, Icelandair, Air 2000 and all scheduled and charter services operated transatlantic services. El Al display type between Tel Aviv and many of its European destinations.

II

Apart from the initial passenger version 757-200, Boeing offered several sub-variants using the same length of the fuselage and wings, although these are sold in quantities limited.

The first of these, the 757-200pF Package freighter, was developed for United Parcel Service (UPS) when it had 15 firm and 20 optioned orders for Pratt & Whitney PW2037-powered aircraft to December 31, 1985. These featured a 134 – by 86 inches, opening upward, hydraulically operated door main cargo deck in the future, the left side, a smaller, 22 – access door 55 inches crew, a loading system, a solid barrier, fitted sliding door between the cabin and the main deck cargo bay, and the removal of all window passengers, "the kitchens and toilets. First delivered UPS modified on 16 September 1987, the twin-engine, with a maximum 240,000 pounds to lose weight, which offers 6680 cubic feet of main and 1,830 cubic meters of volume floor below, allowing a maximum of 15 pallets to be carried in the old passenger space.

A modified version, the 757-200M Combi, maintains facilities -200 passenger and cargo loading elements of the-200pF, allowing three pallets and 150 passengers simultaneously housed in the main housing. Although it had been Available with 250,000 pounds of high gross weight, only one, in the event, had been ordered by the Royal Nepal Airlines.

A conversion program, developed by Pemco Aeroplex in 1992 allowed companies to transform existing passenger aircraft admixture of rapid change, or load variations, with a capacity of 11,276 U.S. gallons of fuel and maximum weights, those of 200pF.

The only military version, the C-32A, had been ordered by the U.S. Air Force to replace its thirst for fuel, outdated, quad-engined VC-137s, and had offered a 45-passenger interior. First flight of Renton on February 11, 1998, the aircraft ultimately, comprising a fleet of four, had been operated by the 89th Airlift Wing Base at Andrews Air Force Base in Maryland.

III

One representative, 757-200 transatlantic flight, operated by Icelandair from New York-JFK to Reykjavik, Iceland, forthcomingly illustrated.

The plane output expected to operate daily, afternoon Iceland, signed TI-FIH, had been driven 40,100 pounds of thrust Rolls Royce turbofans and configured RB.211-535E4 for 22 four deep, two-two, Saga business class, with wings and footrest fitted seats and 167 a day, six, three and three years, seats in economy class all covered with soft, blue upholstery. The 250,000 pounds, high gross weight aircraft, with an average of 8800 pounds of cargo capacity, offering a wide 3.900 miles.

Back to the gate 21 is now available on the JFK International Arrivals Building in 2050 per day of a massive air 747-400 Korea after the sweltering heat of 90 degrees, early summer days, blue-trimmed, long fuselage 757-200, somehow reminiscent of the DC-8-63S which had replaced, but with only half the number of power stations, it became an independent entity after the disengagement in the middle of the tow hooks black highlighted by the sunset glow monitoring of clouds on the western horizon.

The two people, cabin technology transition appears in both traditional analog dials and six tubes advanced cathode ray tubes (CRT) displays, the first consisting of an anemometer, an altimeter, vertical speed indicator, a clock, and flight instruments blank, while the second was the system of electronic flight instruments (EFIS), two electronic attitude and direction indicator (EADI), and two engine indication systems and crew alert (EICAS), the latter located in the central panel. The system of electronic flight instruments, grouped in the attitude director indicator (ADI) and horizontal situation indicator (HIS), provided aircraft attitude and position information through CRT screens in seven colors.

Attitude director indicator, specifically, provided aircraft attitude and pitch and roll data, together with low speed, autopilot, auto throttle and direction control modes, operating in conjunction with the horizontal situation indicator, which gave the track aircraft, speed and wind direction, lateral and vertical deviations, and reference point estimated times, and could be used in four basic modes. The map mode, the first weather radar profits generated at different scales, while the VOR mode whenever the position of the plane relative to the course selected VOR. ILS mode relationship of the plane was about to ILS localizer and glide slope, and how to plan, the last of the four, shows the desired portion of the flight plan North at the top of the screen.

The flight deck appears otherwise standard control yoke and a center console between the pilots sports accelerators, flap lever, and speedbrakes, and a console behind him with communications and navigation instrumentation.

Engine start is accomplished turbofan turning the respective ceiling panel rotary switch located in one of its four modes of initiation "GRN", "FLT", "AUTO" or "CONT", after which the switch in the dial turned the levers behind the fuel channel, while the air needed to start rotation fan emanating from the tailcone mounted auxiliary power unit. motor parameters, which appears in the top center CRT, including pressure ratio motor (EPR), fan speed (N1), intermediate rotor speed (N2), high pressure rotor speed (N3), and the oil temperature, oil pressure, and the amount of oil.

The flight plan and points of interest had been charged before initial setback.

A throttle forward gently, then control of ground clearance, preceded by the twin engine taxis, lateral movements made with the help of the tiller steering front wheel on the left side Captain and the low speed indicated by the EADI.

In third place for the takeoff, 216,000 pounds 757-200, operating as flight FI 614 and the control tower in a frequency of 119.1, was instructed to follow the United States 767-300 for runway 13-right, the green central taxiway gradually consumed by the nose wheel plane toward the light shining jewel of the Twin Towers of the World Trade Center in the skyline.

Once centered on the runway, the aircraft was instructed, "Icelandair 614, ready for takeoff, runway 13-Right. Estela Caution turbulence from United 767 heavy." Starting line-up of his two turbofans 40,100 lb thrust Rolls Royce, which forbade its forward movement with the help of the brakes on his toe, before pressing the push switch and unleashing itself in a long roll, motor preservation of life on the throttle reduction and to achieve initial control, through its nose wheel until the rudder became effective in around 50 knots. The engine pressure ratio of green, the temperature of exhaust gas, fuel flow, N1, N2, N3 and indications, pinnacling CRT screen, said air and fuel to generate thrust.

Call forward speed began at 80 knots, the aircraft through the acceleration V1 speed of 162. horizontal stabilizer-leveraged in an eight degrees, the rotation of the nose wheel unlock 757 is divorced from the concrete by Now his wings generating lift, retracting his tricycle landing gear and participation vertical speed mode, since climbed to 200 feet by 175-knot, the attitude 15 degrees.

The gas temperature and fan speed, respectively, recorded 157 and 917.

Pursue your standard instrument departure (SID), the aircraft wings, nodded on a bench on the left on the Belt Parkway at dusk, topping the gold, green, orange and white spot of light, as iridescent spilled paint on a black canvas, in Queens, New York on 126.8 contact output.

Climbing through 500 feet, the autopilot engaged lateral control navigation and the rate of climb, retract its fins end dual slot edge of the position of five degrees.

Ascending even 3,400 meters, it was instructed to conduct a 060-degree heading and climb to 11,000 feet and maintain. Crossing Long Island on a diagonal track, which represents a rise of 6,000 feet per minute at a speed of 220 knots, becoming the cockpit increasingly locked in the wake. The list was completed climb.

Also instructed to climb and maintain 17,000 feet, Flight 614 fell through a cloud of smoke cover to Connecticut, overcoming the upper cloud to 24,000 feet, where the last remnant of the sky blue ice had been temporarily illuminated by lightning.

Apparently caught in black, vaporous void, turbulence-incubation, the slender, fuselage narrow body, driven by its diameter in width, life, providing engines, settled into the plateau assigned flight level 350, surrounded by his port wing by an arctic blue line in Portland, Maine. The VNAV was hired.

Dinner and detailed by the "Saga Business Class Menu" and preceded by a selection snacks and spirits, including "diplomatic pate" and jumbo shrimp on a bed of lettuce with lemon and cocktail sauce for seafood in saffron Pernod au gratin sauce or fillet of veal with mushroom cream sauce served with tortellini, green beans and carrots, a selection of red and white wines, a basket of bread and butter Iceland; Bel Paese Italian soft cheese, slices of Gouda cheese, crackers, red grapes, and nuts, cheese cake with raspberry sauce topped with shaved chocolate, coffee, a selection of spirits, and French chocolates filled with hazelnut.

Caught in the black void, referenceless since continued its northeast track transatlantic the intercontinental Boeing 757 had traced his way invisible on St. John, New Brunswick, and the Gulf of St. Lawrence, and Goose Bay, Labrador, before leaving the continent of America North over the ocean with bad intentions, the only light visible outside the cockpit now the blink reflex, a lighthouse on the fuselage of the port side engine cover.

Due to the position of the sun's northern hemisphere, however, the day came quickly, the time Iceland 0340, or 2340 hours from New York, in the form of a thin, barely perceptible line of cold blue, dull, dividing the night sky above the black surface, the ocean indistinguishable and smoke, the layers of the slab as a cloud below. This represents the horizon line. Somewhere beyond the left, place the tip of Greenland and, further north of it, Narssarssuaq. The blue line intensified.

Dawn glow chartreuse subsequent drilling of the cloud layers with an intensity of fire, the sky transformed into a series of dark red and copper lines, lighting Arctic snow cover cumulostratus similar cloud now became visible under the wings of the engine support pylon.

Start the automatic landing, aircraft TI-FIH was installed in a reduced power, lower than 3,500 feet per minute, the transition through anemometer 32,000 feet advanced beyond the mark of 300 knots. motor parameters, varying according to engine, including an engine pressure ratio of 096, a fan speed of 390, and an exhaust gas temperature of 307. landing weight, after burning the fuel in route, had been estimated 180,000 pounds, or well below its maximum.

Bowing to and penetrate the white and gray cloud tendrils produce turbulence at 16,000 feet, the twin-jet pierced the darkness with its bullet nose, now assuming a rate of 1,800 feet per minute descent. In order to comply with the speed restriction of 10,000 feet, the speed is set to 250 knots and the altimeter 2,000 feet.

Descending through 9,000 feet in a shallow, 500 feet per minute rate, the captain cut the ILS approach chart to Keflavik International Airport Track 20 and yoke control, adjustment in the automatic terminal information service (ATIS) and the deck watching the clouds, rain and a temperature of over nine degrees Celsius for our arrival.

Penetrating gray density in a 089-degree heading, the aircraft descended through 2,900 feet, when the warning light illuminated altitude, explaining the imminent approach of the previously established limit of 2,000 meters. Indicated airspeed (IAS) was marked with the brand "215"-node.

Maximum trailing edge flap extension speeds, according to the poster cabin indicated 240 knots for a degree, 220 for five degrees, 210 15 195 20, 190 for 25, and 162 by 30.

The EHSI display, changed the manner of the NIT expanded, given the weather and traffic data, and the button on captive mode is activated.

Getting rid of the darkness to 2,000 meters, the 757 emerged over the sea of gray, silver at its summit in the Atlantic, a brief detention its descent and mobilization in a bank right into a 141-degree heading and the tip of Iceland. The indicated air speed marked the creation of 180 knots.

Extension of double-slit fins to the position of five degrees in speed purged the mark of 200 knots, the flight 614 maintains a 201-degree approach the end game.

The landing gear lever, down to 180 knots during the review of the Final List Approach, had been followed by incremental flap extensions, the 20 – and finally the positions of 30 degrees, the last coincident with a remarkable nose down trim, a 158-knots. Needled by the rain, the aircraft came the red and white, the runway threshold, the lights, beyond which the lines of white touchdown could be seen through the pods of low-lying clouds.

Passing on the green, brown, gold and lava fields carpeted with moss and multicolored roofs Keflavik, the 757-200 level dropped to 1,000 feet to a speed of 500 feet per minute, its speed to 143 knots tied VREF, and closed the gap to the track 20 in the midst of a deepening crisis and called automatic altitude: 100 … 50 … 40 … 30 … 20 … 10.

Knocking on the concrete with four wheels, extended the main undercarriage units, the bioreactor rebowed to Earth until its nose wheel made contact with the test of equality-focused white light, its momentum investor and manages speedbrake and armed.

called ground speed, mimicking the broadcast during the outbreak ensued: "80 … 70 … 60 … 50" moment in which the reverse thrust mode was turned off and the concrete barely moved below the cabin windows.

Turning off the active runway, now with the help of the nose wheel tiller, twice as long, narrow body, somehow assuming identity by an error of intercontinental airliner, rolled up next to a TI-registered 737-400 Icelandair FIB Gate as the reference count rose wand instruct in size until they were inches from the nose, where the parking brake was engaged and the accordion-like jetbridge spread to the second door, port.

IV

Increased demand on routes 757 maturation, along with the ability to stretch inherent in the design, resulted in the first type, and only Version different dimensions, which provided ten percent reduction in seat-mile costs and increased its passenger capacity and cargo volume in the ground, respectively, 20 to 50 percent.

First announced on September 2, 1996, after German charter airline Condor Airlines has ordered 12 companies and 12 option aircraft, type, named "757-300", introduced a stretched fuselage 23.4 meters high, consisting of a cap of 13.4 feet front wing and a grounded three yards behind him, producing a new length, overall 178.7 meters. world's largest, single-aisle twin only Long overshadowed by the quad-engined DC-8 Super 60 series, it could accommodate 289, a single class, six passengers a day in a field of 29-inches, although a provision more typical mixed class in a standard way involves 12 first class seats, four a day in a 36-inch and 231 economy class seats, six to day, with a slope of 32 inches, all in the long, 141.9 meters long, great looking car model for the next generation 737. volume lower deck also increased to 1,071 cubic feet in the forward hold and 1,299 cubic feet in the hold of the stern.

To meet the increased tensions created by the fuselage longer, there was the strengthening of the wings, high lift devices, engine mounts and landing gear, and a skid protection guaranteed excess tail angles of rotation.

However boosted by two Rolls Royce RB.211-535E4 turbofan, the aircraft had a maximum weight of 240,000 pounds takeoff and a range of 2,055 nautical miles with 243 passengers.

The prototype of 757-300, and the 804th plane built NU701, was shot first in Renton, Washington, on May 19, 1998, and took to the skies in search of the first air speed within three months after the August 2, completing a successful flight, 2.5 hours in which peaked at 250 knots indicated and the altitude of 16,000 feet. Employed in the initial airworthiness and the realm of basic controllability of the flight test program, they explored flutter, stalls, stability and control, and demonstrated the need for installation of vortex generator at the forefront of the outer flap to improve job characteristics.

Two airframe others, NU721 NU722, allows the program after completing 356 flights collectively totaling 912 hours, and led the FAA certification for 180 minutes ETOPS raids, the January 27, 1999, ending the shortest design cycle to production of an assignment Boeing made products, which lasted 27 months.

Condor inaugurated the type of revenue in service two months later, on 19 March.

The improvements to the existing 757-200 and -300 have been met with aviation partners Boeing Blended Winglet Retrofit Program. winglets, large rays and variations with chords in soft sections transition, avoiding concentrations of drag producing vortex and facilitate optimal aerodynamic lift, resulting in lower wing tip vortices any straight-wing or even conventional systems winglet angle transitions occur.

The conversion, which had a weight of 1320 pounds system involves the outer skin and the replacement of ribs, reinforcing the boom in the tank, closing under the cover replacement, additions flap edge vortex generator, and external position and installing new anti-collision lights.

The system, an increasing scale of a former and a current 124.10 134.9 meters, gave abundant economic benefits and performance, an annual average fuel economy for aircraft of 300,000 U.S. gallons.

The first of eight feet, winglet 757 equipped two inches, a plane belonging to the -200 series Continental Airlines, flew for the first time on March 9, 2005, in Everett, Washington, and today the program qualifies as a resounding success.

V

On October 18, 2004, the 1050 th and final Boeing 757, a -200 series original length, left the plant final assembly in Renton and was delivered to Shanghai Airlines in China the following year.

The aircraft, having been designed as increased capacity, twin-engine advanced counterpart to the 727, and a smaller capacity, narrow body complement to 767 simultaneously developed to stop intercontinental routes unique, exclusive and filled two markets thus created one of their own, ultimately becoming more capacity and two intercontinental versions reaching. Of the 1049 aircraft delivered, 913 were 757-200, 80 had been 757-200PFs, one was a 757-200M, and 55 had been 757-300.

The victim of the post-9/11 recession and the reduction in air travel, the type has been largely usurped by the very Next Generation Boeing 737 and Airbus A-321, whose lower passenger capacity best suited to the changing demands of route. While this limited capacity 787-8 may provide high-capacity replacement in 757 sectors no direct counterpart provides advanced design today, with the high-end versions of their own eventual replacement Boeing 737 likely to qualify as his successor. Without But the type that represents the pinnacle of single-aisle, twin-engine aircraft development, whose load parameters and scope far beyond that traditionally associated this type of configuration.

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