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Boeing 757

I

Increased demand for existing Boeing 727 flights, which are often overshadowed by the capacity of even the stretched, -200 series coupled version, with advanced technology, dictated the need for either a larger variant of this venerable tri-jet or a completely new design.

The first experiments on the former approach, had bid on a barrel sufficiently stretched to accommodate 189 passengers and three refanned, higher capacity Pratt and Whitney JT8D-217 engines each developing 20,000 pounds of thrust. Designated 727-300b, it first appeared in the 1975 Paris Air Show in the model. Despite initial interest from United Airlines, airlines had felt it necessary calmer, yet more-advanced nuclear.

A fundamental redesign, retaining the 727 nose, forward fuselage, and T-tail, and designated "7N7" highlighted an additional fuselage stretch and a new technology wing, the pair, like the much smaller 737, two pylon-mounted engine, which Pratt and Whitney JT10D-4, Rolls Royce RB.211-535, and General Electric CF6-32 was then considered. Although it had been intended, like his inceptional counterpart, the one-stop transcontinental sectors contained its wings sufficient fuel tank volume for the eventual, long-range deployment.

Because wide-body comfort was well received by passengers on intercontinental routes that had an iteration briefly examined a wider hull cross-section of twin-aisle, 180-passenger conditions. The concept would have fulfilled two needs: 1). It would have offered increased comfort, and therefore become more competitive with the then pending Airbus Industries A-300 in a relatively short American household, and 2). It would have been avoided the overly long hull is necessary to take account of possible future capacity expansions may involve a requirement for long undercarriage struts to maintain good starting rotation angles.

They imagined width, however, had been too much of a payoff to these benefits, as evidenced by weak airline interest since the weight and drag associated with a second aisle, and only one more space up was inconvenient, and its cross section, even broader than the 7N7, was still too narrow to accept the default LD-3 luggage and cargo containers.

To return to its narrow-body studies, Boeing proposed an advanced, high-capacity 727, which was in February 1978, highlighted his nose, cockpit, and hull cross-section, but had introduced a new wing and two turbo fans for a 170-passenger complement, thus employs a large number of common features to simultaneously developed, twin-aisle 7×7 design. renamed "757," it would be Boeing's fifth largest commercial airliner to implement the seven-slash-seven-model sequencing numbers after 707, 727, 737 and 747, all except the last one had narrow bodies.

Compared to the 727 it had been intended to replace, had offered a 15 percent lower fuel consumption, but its large wing area naturally promoted weight, reach and capacity expansions for any future derivatives.

In order to reduce development costs associated with its 767, the wide body, twin-aisle, twin-engine counterpart initially also intended for one-stop transcontinental routes, Boeing, where possible, incorporated maximum uniformity of the two aircraft and the types, therefore, has the same front nose sections, windscreens, quad-wheeled main undercarriage units avionics, and cockpit systems. Indeed, the two aircraft will offer a new generation of advanced narrow and wide body twinjets, offering a common type rating, enhance mixed-fleet flying from carriers that operate both types, and even the originally planned 727-style T-tail was deleted in favor of the 767 conventional, low-wing configuration to the very end of the design phase, resulting in greater consistency with the 767 than the 727 it was intended to replace.

Launch orders for 21 firm and 24 options and 18 firm and 19 options were respectively located at Eastern Airlines and British Airways, 13 August 1978, the Rolls Royce RB.211-535C-powered aircraft. With a 196-passenger capacity in a six-oriented, 34-inch seat pitch configuration, 757, with a 220,000-pound gross weight, were optimized for 2,000-mile sector, while an optional, 230,000 pound weight would increase the number of 2500 miles.

Structural weight reduction, which lowered the seat-mile costs that were achieved with advanced composite and aluminum alloy construction, the former consisted of carbon-fiber-reinforced plastics are used in engine displays, ailerons, spoilers, elevators, and rudder, and Kevlar-reinforced plastics employed in the engine pylon fairings and fine and tailplane tip fairings. copper and zinc aluminum alloys were used in the wing skins, stringers, and lower Spar beams. alloy, which offers strong increases of between five and 13 percent, combined with composite materials, reduced structural weight of 2,000 pounds and resulted in an average annual per-aircraft fuel savings of 30,000 U.S. gallon based on a utilization rate of 1,400 1,000-mile sectors.

The aircraft in its original version 757-200, bidding for a 155.3-foot length.

In aluminum alloy, two-Spar Wing, whose middle section passed continuously through the hull, offering a 124.10-foot span, a 1994 square meter area, and five percent of plans and shared a high degree of commonality with that calculated for 767, the aft-loaded profile delaying Mach drag rise. But it was thinner at the base time point of the hull, and offered 25 in contrast to 32.5 percent of sweepback. Its traditionally higher tensile had been neutralized by its Standard light specific mission profiles that because of their shorter duration, resulting in a higher percentage of climb and descent cycles. It had a 7.82 aspect ratio, or ratio of length to width.

Lift was extended with full-span, five-section leading edge slats and double slotted trailing edge flaps, while Roll Control was supplied by al-speed outboard ailerons, even assisted by five-section spoilers. They may alternatively be inserted as speed brakes in flight or lift dumpers on earth where two inboard spoiler panels could also be used.

Power, supplied by two high bypass ratio turbo fan pylon mounted on the underside of the wing's leader, and the diameter would not have been possible with the 727's aft fuselage installation arrangement resulted in the bending movement of relief.

Rolls Royce RB.211-535C, the cropped version of the 42,000 fan thrust-reversing system pound RB.211-22B developed for the Lockheed L-1011 Tristar, recruited composite pod design to reduce weight and the first race at 757, 23 January 1982. The three-shaft, 37,400-pound thrust powerplant was chosen to launch customer Eastern and British Airways.

The more advanced RB.211-535E4-wide chord turbine blades, high pressure module increases and a common exhaust nozzle for the fan and main rivers, offered an eight percent fuel reduction in its cruise mode and a four-point pressure increased from 23:1 to 27:1, more than its previous-535C version. The 40,100 thrust-reversing system pound engine was confirmed on 30 November 1983 and first flew on the 757 prototype in February years after.

The Pratt and Whitney PW2037, initially indicated by American Airlines and Delta, had been the aircraft's second and only other engine. Originally designated JT10D, the two-shaft turbofan, inceptionally planned as a 26,700 thrust-reversing system pound engine when the program was launched in February 1972, had evolved into the current 37,000 thrust-reversing system pound turbofan, whose high-pressure compressor efficiency has been improved with a smaller compressor combined with a higher core speed. First flight on the 757 prototype in March 1984, it was confirmed to 37,600 pounds of take-off thrust, and had a bypass ratio of 5.8:1. production version offered a stack capacity to 38,200 pounds, while the higher gross weight in the diversion of aircraft could alternatively be powered by 41,700-pound thrust PW2040s.

Fuel was carried in two integral wing and a center section tank with that stored in the outer shells burned last to preserve wing bending relief motion. Capacity was 11,253 U.S. gallon.

The conventional, low-flying tailplane, adopted late in the 757's development program, facilitated a total length reduction of 18 feet, but resulted in a longer cabin than 727 have been replaced and improved ground maneuverability. The variable incidence, lift-equipped horizontal tail, made up of full-span, light metal torque boxes, had a 542-square area, while the vertical structure consists of a three-Spar, double-cell, light metal torque box that covered a 370 square-meter area.

The motorcycle undercarriage featured a double-wheel forward-retracting force the nose gear strut and two quad-wheels, laterally-retracting force units consist of Dunlop or Goodrich wheels, carbon brakes and tires.

Standard light cockpit featured two operating companies, crew and one observer's seat, while the cabin, at 118.5 meters long, 11.7 meters wide and seven meters tall, had played a wide body look with large, Kevlar, individually closable overhead storage compartments, a sculpted ceiling, recessed lighting cast sidewalls and slimline seats. galley, toilet and cloakroom number and location depending on customer preferences, but could be installed in front, aft, or amidships.

Numerous class, pitch, density and seating arrangements, again according to customers' choices were available. A 178-passenger complement, for example, involved 16 first class seats in a four-oriented, two-two configuration of a 38-inch pitch and 162 economy class seats in a six-oriented, three-three arrangement on a 34-inch pitch, while 208 passengers could be accommodated in a 12 first class and 196 economy class configuration, the latter on a 32-inch pitch. Single-class, high-density, and including round-trip charter densities, at a minimum 29-inch pitches, included 214, 220, 234 and 239 passengers, the latter exceeded 727 to 200 is a maximum of 50 passengers and undercut wide-body 767-200 has a corresponding number.

Cabin access was given by either the three main passenger / service doors and two over wing emergency exits on each side or four passenger / service doors on both sides.

The two underfloor holds, access to the starboard side, lower deck doors, offered 700 cubic feet of space in the anterior space and 1090 cubic feet in the rear one.

Boeing 757 systems from Honeywell-Vickers motor hydraulic pumps and four Abexe electric hydraulic pumps. An Allied-Signal GTCP331-200 auxiliary engine (APU), provided the supply of power for air conditioning, lighting, and the engine starts.

Full program approval was received in March 1979 and final session, all previous narrow-body airliner, took place in Renton, Washington, with the first metal cut of 10 December and the first large collection, which takes place 13 months later, in January 1981.

First rolled out on 13 January 1982, or five months after its wide-body 767 counterpart, and takes to the skies for the first time on 19 February the 757-200 prototype (N757A) was flown by Test Pilot John Armstrong and driven 37,400 of thrust-reversing system pound RB.211-535C turbo fans, completing a successful two hours, 31 minutes Constituent sortie where it had obtained a 250-knot indicated air speed (IAS), before landing at Paine Field Boeing''s Flight Test Center in Everett. Although they have introduced the first CRT display device, two-person cockpit, and after having been the first Boeing design have been initiated with a foreign powerplant type it had appeared simple handling characteristics.

The five aircraft used in flight test program ultimately showed that in relation to design original 1979 specifications it had a 3,650-pound lower operating weights, a 200-mile greater range capability, and burned three percent less fuel.

FAA certified 21 December 1982, 757-200, Boeing's longest single-aisle twinjet entered service with Eastern Airlines flight the following January 1 of the Atlanta-Tampa and Atlanta-Miami routes while British Airways, configure its planes for 12 first and 174 economy class seats, took delivery of the type, 25 January and was inaugurated on the use of 9 February, from London Heathrow to Belfast in Northern Ireland.

The first Pratt and Whitney PW2037-powered variant, first flying on 14 March 1984 had been delivered to launch customer Delta Air Lines seven months later, in October, the same month that Eastern received his first, improved powerplant example equipped with RB.211-535E4.

Then flow the aircraft, with 186 mixed-class passengers, had a 220,000-pound maximum gross weight and a 198,000-pound maximum landing weight, which offers a coincident 2,820-mile range capability although medium-range missiles versions had a 230,000 pound weight and long-range examples featured 250,000-pound gross weight, in which case the 3,820-mile sectors flown.

Although maturing DC-9, 727, and 737 routes had conceptionally dictated by the need for 757, its increasing gross weight and therefore different opportunities, allowed for longer trans-and intercontinental sector implementation, partly in response to rising fuel prices, and it often is served, if not replaced, 767-200 services, thus complementing, before usurped, its twin-aisle counterpart. Both Delta and Eastern Europe, for example, operated transcontinental segments from their Atlanta hubs, while USAir imitated this pattern to Los Angeles and San Francisco from its Pittsburgh flight-like base. Ladeco operated intercontinental service from Santiago, Chile, to Miami and New York, while Canada 3000, Icelandair, and Air 2000 all operated scheduled and charter flights transatlantic routes. El Al introduced the type between Tel Aviv and many of its European destinations.

II

Other than the original 757-200 passenger version of Boeing offered several subvariants use the same fuselage length and wingspan, though these are sold in limited quantities.

The first of these was the 757-200PF Package Freighter, developed for United Parcel Service (UPS) where it had placed 20 firm and 15 optioned orders for Pratt and Whitney PW2037-powered aircraft, 31 December 1985. Those bidding for a 134 – to 86-inches, upward-opening, hydraulically-actuated main deck cargo door on the front, left side, a smaller 22 – to 55-inch crew access door, a loading system, a sound system, sliding door fitted barrier between the cockpit and main deck cargo bay, and deleting all passenger-related windows, galleys and toilets. First delivered to UPS on 16 September 1987, twinjet, with 240,000 pounds maximum takeoff weight, offering 6680 cubic feet of main and 1830 cubic feet lower deck volume, which allows up to 15 pallets to be implemented in the former passenger seat.

A modified version that retained the 757-200M Combi, passenger facilities at -200 and cargo system components in-200PF, allowing three pallets and 150 passengers into space while on the main deck. Although it had been available with a large 250,000-pound gross weight, only one, in case there ever had been commissioned by the Royal Nepal Airlines.

A conversion program developed by Pemco Aeroplex in 1992, allowed the airlines to modify existing passenger planes for mixed, rapidly changing, or all-cargo variants, with a 11,276 U.S. gallon fuel capacity and maximum weight of the-200PF.

The only military version had C-32A, has been commissioned by the U.S. Air Force to replace its fuel-thirsty, outdated quad-engined VC-137s, and it had bid on a 45-passenger interior. First flight from Renton, 11 February 1998, the aircraft eventually consist of a fleet of four, had been run by the 89th Airlift Wing at Andrews Air Force Base in Maryland.

III

A representative transatlantic 757-200 aircraft operated by Icelandair New York-JFK to Reykjavik, Iceland, is forthcomingly illustrated.

The aircraft, scheduled to run daily, evening flight to Iceland, registered TI-FIH had been driven by 40,100-pound thrust Rolls Royce RB.211-535E4 turbo fans and configured to 22 four-oriented, two-two, Saga business class, winged and footrest-equipped seats and 167 six-oriented, three-three economy class seats, all covered with soft blue upholstery. the 250,000 pounds, high gross weight aircraft with a 8,800-pound average cargo capacity, offering a 3,900-mile range.

Pushed back from Gate 21 at JFK's now-existing International Arrivals Building in 2050 with a massive update Korean Air 747-400 after a sweltering, 90 degrees, early summer, blue-trimmed, long-fuselaged 757-200, somehow recalls the DC-8-63S it had replaced, but with only half the number of atoms, was made an autonomous entity after towbar interruption in the middle of the black twilight highlighted by filament tracing the clouds on the western horizon.

The two-person transitional technology cockpit featured both traditional analog calls and six advanced cathode ray tube (CRT) displays, the previously consisted of an airspeed indicator, an altimeter, a vertical speed indicator, a clock and the standby flight instruments, while the latter consisted of EFIS (EFIS) two electronic attitude and direction indicators (EADI), and two engine indication and crew alert system (eica), the latter located in the center panel. The EFIS, divided in the attitude director indicator (ADI) and horizontal situation indicator (HIS) provided aircraft attitude and positioning information using CRTs in seven colors.

Attitude director indicator, especially if the aircraft attitude and pitch and roll data with ground speed, Autopilot, Auto throttle, and fight direction modes that works with the horizontal situation indicator, which itself gave flight track, wind speed and direction, lateral and vertical deviations, and waypoint expected time, and could be used in four basic functions. Map mode, the first generated weather radar returns in several scales, while the VOR mode, provided that the aircraft's position relative to its selected VOR course. ILS mode showed air ratio relative to its ILS Localizer and glide slope angle, and the plan mode, the last of the four, displayed the desired portion of the flight plan with north located top of the screen.

Cockpit otherwise featured the standard control yoke, a center console between the pilots sporting the stifling, flap lever, and speed brakes, and a console behind him with communications and navigation instrumentation.

Starting the engine was achieved by rotating the respective turbofan roof panel located rotary ignition switch to one of his four starts modes-GRN, "" FLT, "" AUTO ", or" CONT ", then Turn on the quad behind the strangling turned into fuel channel, while the necessary air to begin rotating fan came from tailcone mounted auxiliary power unit. powerplant parameters that are displayed on the upper, middle, CRT, including engine pressure ratio (EPR), fan speed (N1), intermediate rotor speed (N2), high pressure rotor speed (N3), and oil temperature, oil pressure and oil quantity.

Flight plan and waypoints had already been loaded before the first pushback.

A gentle throttle advance after clearance from ground control, prior to twinjet's taxi, lateral movements made with the help of the nosewheel steering tiller on the captain's left side and ground speed out of EADI.

Third to start the 216,000-pound 757-200 acting as Flight FI 614 and the monitoring of the tower at a frequency of 119.1, was instructed to follow the United 767-300 for runway 13-Right, green light Taxiway centerline gradually consumed by the nose wheel when the plane was moving towards the jewel light glittering Twin Towers of the World Trade Center in the distance.

When centered on the runway, the aircraft were ordered, "Icelandair 614, cleared for take off, Runway 13-Right. Caution wake turbulence from the U.S. 767 heavy. "Implementation of the spool-up of its two 40,100 thrust-reversing system pound Rolls Royce turbo fan, it restrained its forward movement through his toe brakes before depressing the traction switch and release itself in a prolonged engine life with reduced maintenance roll throttle settings and obtain preliminary verification through its nose wheel until the rudder was effective in around 50 knots. The green engine pressure ratio, temperature, fuel supply, N1, N2 and N3 indications pinnacling on CRT monitor, confirmed the air and fuel to generate thrust.

Land Speed dial began at 80 knots, the aircraft accelerate through his V1 speed of 162nd Horizontal stabilizer leveraged into an eight-degree nose-wheel loosened rotation plate 757 from the concrete through its now lift-generating wings, retracting force his motorcycle chassis and engaging its vertical pitch mode, as it climbed through 200 feet of a 175-knot, 15-degree position.

Exhaust gas temperature and fan speeds recorded 157 and 917th

Pursue its standard instrument departure (SID), aircraft aileron-nodded in a left bank over the Belt Parkway at dusk, recovering gold, green, orange and white light splotch, like iridescent paint poured on top of a black canvas, of Queens, New York, contact Departure on 126.8.

Climbing through 500 feet, it performs its autopilot to control lateral navigation, and rate of ascent, retracting force his double-slotted trailing edge flaps from the five-degree position.

However, rising 3,400 meters, it was ordered to lead a 060-degree position and to climb and maintain 11,000 feet. Crossing Long Island on a diagonal track, it assumed a 6000 foot-per-minute climb to a 220-knot airspeed, the cockpit is becoming embedded in the slipstream. ascent checklist was completed.

Further instructed to climb and maintain 17,000 feet, Flight 614 crashed through a smoky cloud deck against Connecticut, overcome its hazy on top of 24,000 feet, where the last remnant of the cold blue sky was temporary floodlit by lightning flashes.

Apparently trapped in a black, vaporous, turbulence-incubating invalid, the slender, narrow-body fuselage, propelled by its large diameter, life-supply engines, solid in its assigned plateau at flight level 350, bordered off its port wing of a line in the arctic blue of Portland, Maine. The VNAV was engaged.

Dinner, details of the "Saga Business Class Menu" and start with a selection of aperitifs and spirits, included "pate diplomat" and jumbo shrimp on a bed of lettuce with fresh lemon and cocktail sauce, seafood in saffron Pernod sauce au gratin or Filet of veal in mushroom cream sauce served with tortellini, green beans and carrots, a selection of red and white vintage wine, a bread basket Icelandic butter; Bel Paese Italian soft cheese, slices of Gouda, biscuits, red grapes and walnuts, cheese cake with raspberry sauce topped with shaved chocolate, coffee, a selection of liqueurs, and the French hazelnut-filled bonbons.

Caught in the black, reference less void because it pursued its northeast, transatlantic track, the intercontinental Boeing 757 had traced its invisible path of St. John, New Brunswick, Gulf of St. Lawrence and Goose Bay, Labrador, before departing the North American continent during of fears the sea, the only light now visible outside the cabin reflection of the flashing under-hull lighthouse on the port engine cowling.

Because of the sun Northern Hemisphere location, however, days quickly showed the 0340 Island time, or 2340 New York time, in the form of a thin, barely visible line of cold, dull blue, as distinct night sky over from the dark, indistinguishable ocean surface and smoky, slab-like layer of cloud below. This line is represented in the distance. Somewhere, over the left wing, was the tip of Greenland and, further north of it, Narssarssuaq. The blue line intensified.

Dawn's subsequent Chartreuse glow piercing the cloud layer with fiery intensity, the sky turned into a series of dull red and copper stripes, floodlighting the Arctic snow-like cumulostratus cloud deck which was now visible in the engine pylon support wings.

Initiate its automatic landing aircraft TI-FIH established a power-capped, 3,500-foot-per-minute descent, cycles through 32,000 feet as its airspeed, which grew out of the 300-knot mark. Engine parameters, varying according powerplant included an engine pressure ratio of 096, a fan speed of 390 and an exhaust 307th Landings after THE ENROUTE UNITS fuel consumption was calculated as 180,000 pounds, or well below its maximum.

Bow to the courage and penetrating the white and gray, producing turbulence cloud CARRIER RANK at 16,000 meters, the twinjet bored through obscurity with his ball-nose, now assume a 1800 foot-per-minute descent. To keep the 10,000 foot speed limit, the airspeed was down to 250 knots and altimeter to 2000 feet.

Descending through 9,000 feet of a shallow, 500 foot-per-minute rate, the captain cut ILS Approach Chart to Keflavik International Airport's Runway 20 at his control yoke, tuning of the automatic terminal information service (ATIS) and observe cloud cover, rain and a temperature of plus nine degrees Celsius to our arrival.

Penetrating gray density of a 089-degree position, the plane down through 2,900 feet, after which the altitude alert light turned on, indicating impending approach of the previous sets 2,000-foot restriction. Indicated air speed (IAS) was now called "215"-knot mark.

Maximum rear flap extension speeds, according to the cockpit placard indicated 240 knots for a degree, 220 for five degrees, 210 for 15, 195 to 20 190 to 25, and 162 to 30

The EHSI display changed to the extended ILS mode, beat the weather and traffic data and Localizer captive mode button is enabled.

Throwing the obscurity of 2,000 feet, encountered 757 over the marine-gray, silver-capped Atlantic Ocean, arresting its brief descent and leverage in a right bank against a 141-degree position and the tip of Iceland. They stated air speed was dialed 180 node configuration.

Extend his double-slotted flaps to the five-degree position as the airspeed bled off to the 200-knot mark, Flight 614 maintained a 201-degree final approach heading.

The undercarriage lever is lowered to 180 knots during review of the final strategy checklist were followed of individual samples flap extensions to the 20 – and finally 30 degrees positions, the latter coinciding with a known nose-down trim, a 158-knot airspeed. needled of rain, the plane was approaching the red and white, open-threshold, beyond which the white touchdown lines could be seen through the low-lying clouds sheaths.

Passes over the green, brown and gold moss-carpeted lava fields and multi-colored roofs in Keflavik, the 757-200 down the 1000-foot level on a 500 foot-per-minute rate, the VREF speed related to 143 knots, and closed the gap to rail 20 in the middle of a progressive flare and automatic elevation dial: "100 … 50 … 40 … 30 … 20 … 10".

Thudding further Concrete with its quad-wheels, extensive main undercarriage units twinjet rebowed earthward until its nose wheel had equal contact with the white light-centered strip, its thrust reverse and speed brake handle is already armed.

Land Speed requires that mimic those transferred during the flare, followed: "80 … 70 … 60 … 50" at which time the reverse thrust mode has been disabled, and the concrete barely moved during the cockpit windows.

Turn off the active runway, now with the help of nose wheel steering tiller, the long, narrow body twin, one way or another, has assumed the false identity of an intercontinental passenger aircraft, taxied to Gate One next to an Icelandair 737-400 registered TI-FIB as wand-instruct mars halls grew in size until he stood only inches from the nose, where the parking brake was engaged and the accordion-like jetbridge was extended to the other, the port door.

IV

Increased demand for maturation 757 routes, combined with design inherent stretchability resulted in the type's first and only dimensionally stable divergent version offered ten per cent lower seat-mile costs and increased its passenger capacity and underfloor cargo volumes, respectively 20 and 50 percent.

First announced on 2 September 1996, the German charter airline Condor Flugdienst had placed an order at 12 fixed and 12 optioned aircraft type, designated "757-300," offered a 23.4-foot hull stretch, which consists of a 13.4-foot connector front wing and a ten-foot connector behind it, producing a new 178.7-foot length. The world's largest, single aisle twinjet, overshadowed only in the length of the quad-engined DC-8 Super 60 series, it could accommodate 289 single-class, cutting edge six passengers on a 29-inch pitch, although a typical mixed-class event more Standard light resulted in 12 first class, four-oriented sites on a 36-inch pitch and 231 economy class, six-oriented sites on a 32-inch pitch, all in the elongated, 141.9-foot-wide, long-look cabin modeled after the Next Generation 737th Lower deck volume also increased to 1071 cubic feet in the forward hold and 1,299 cubic feet in the rear hold.

To meet the increased stresses created by the longer fuselage, strengthening occurred on the wings, high-lift device, engine pylons and undercarriage, and a tailskid guaranteed protection under the excessive rotation angles.

Still powered by two Rolls Royce RB.211-535E4 turbo fans, the plane had a 240,000-pound maximum takeoff weight and a 2055 nautical mile range with 243 passengers.

The prototype 757-300, NU701 and 804: e built aircraft, was first rolled out in Renton, Washington, 19 May 1998, and took to the skies for the first time three months later, the 2. August, completing a successful 2.5-hour flight, which reached a maximum, 250 knots indicated air speed and 16,000 feet. Employed in initial airworthiness and basic controllability realm of the flight test program, explores flutter, stalls, stability and control, and demonstrated the need for the vortex generators on leading edge of the outboard flap to improve stall characteristics.

Two other airframes, NU721 and NU722, allowed completion of the program for 356 planes collectively totaling 912 hours, and led for FAA certification for the 180-minute ETOPS tours, 27 January 1999, included the shortest design-to-production cycle of former Boeing derivative, which had lasted 27 months.

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

Improvements to the existing 757-200s and-300s were achieved with Aviation Partners Boeing Blended Winglets Retrofit Program. Winglets, featuring large radii and smooth chord variations in transition sections, avoiding the drag-producing vortex concentrations and provide optimum aerodynamic loading, resulting in smaller wing tip vortices than either right wing or even conventional Winglets systems with angular transitions produce.

The retrofit, which carried out a system weight of 1320 pounds, resulting in outer skin and rib replacement, in-tank stringer reinforcement, lower coverage fastener replacement, leading edge flap vortex generator additions and new external position and anti-collision light installation.

System, increasing wingspan from a previous 124.10 to a current 134.9 feet, resulted in numerous economic and performance benefits, including an average annual per-aircraft fuel saving of about 300,000 U.S. gallon.

They first eight-foot, two-inch Winglets-equipped 757, a -200 series aircraft from Continental Airlines, first flew on 9 March 2005 from Everett, Washington, and now the program can considered a resounding success.

V

18. October 2004, 1,050 th and last-Boeing 757, an original length of the -200 series, rolled out of the final assembly plant in Renton and was delivered to Shanghai Airlines China the following year.

The aircraft is designed as a larger capacity, twin-engine, advanced counterpart to 727, and as a smaller capacity, complementary narrow-body simultaneously developed 767 for one-stop transcontinental routes, unique filled two markets and thus created one of his own, eventually morphing in both higher capacity and longer-range intercontinental variations. Of the 1,049 aircraft delivered, 913 were 757-200s, 80 had 757-200PFs, had been a 757-200M, and 55 had 757-300s.

Victim of the recession and the post-9/11 reduction in flights, the type was mostly usurped by Boeing Next Generation 737 and Airbus A-321, if less passenger capacity better matched revised route calls. Although the current 787-8 may provide limited replacement capacity of high capacity 757 sectors not directly, cutting-edge design counterpart is now envisioned, with the advanced version of Boeing's own eventual 737 replacement probably To qualify as his successor. Nevertheless, the type represented the pinnacle of single-aisle, twin-engined aircraft development, the payload and range parameters which far exceeded those traditionally associated with such a configuration.

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