Even faster subsonic designs, like the Boeing Sonic Cruiser, have been met with little industry interest in an era of increasingly higher economic pressures on the airlines. [14] The design would be powered by the General Electric GE4/J5 engines. The Boeing 2707 was intended to be the first American supersonic airliner, but increasing outcry over the environmental effects, notably the sonic boom, led to its cancellation in 1971 before the two prototypes had been completed. The use of high-lift devices on the leading edge of the wing lowered the landing angles to the point where the "drooping nose" was not required, and a more conventional rounded design was used. [dubious – discuss] As the most advanced supersonic transports became some of the oldest airframes in the fleet, profits eventually fell, due to rising maintenance costs.[38]. It was one of the earliest wide-body aircraft designs, with 2-3-2 row seating arrangement at its widest section[14] in a fuselage that was considerably wider than aircraft then in service. The SST mock-up included both overhead storage for smaller items with restraining nets, as well as large drop-in bins between sections of the aircraft. The FAA estimated that there would be a market for 500 SSTs by 1990. During development the required weight and size of this mechanism continued to grow, forcing the team to start over using a conventional delta wing. They felt that there was no way to build a transatlantic design with that performance in time to catch the Concorde's introduction, abandoning the trans-Atlantic market to the Europeans. Most of the freeware add-on aircraft and scenery packages in our file library come with easy installation instructions which you can read above in the file description. The Boeing 2707 was the first American supersonic transport (SST) project. According to Train, this could lead to greater ground-level heat and hamper the formation of ozone. [19], Halaby attempted to dismiss these concerns, stating "The supersonics are coming−as surely as tomorrow. A key design feature of the 2707 was its use of a swing wing configuration.

After winning a competition for a government-funded contract to build an American SST, Boeing began development at its facilities in Seattle, Washington. Featuring new add-ons, products and industry news. Aircraft of comparable role, configuration, and era, American proposed supersonic airliner design, National Oceanic and Atmospheric Administration, "The Supersonic Transport as an Instrument of National Power", "Nation: The Congress: Score One for Persistence", https://www.nytimes.com/1970/12/05/archives/house-foes-of-sst-seek-voiding-of-endorsement.html, "The Online Encyclopedia of Washington State History", "New aerodynamic design, new engines, spawn a revival of the SST", "787 owes a debt to unsuccessful sibling, the Sonic Cruiser", Boeing SST mockup on display at the Hiller Aviation Museum, 1964 Concept Film at British Movietone Digital Archive, Boeing 2707-300 Description at emotionreports.com, Initial 733 proposal images on Russian site sergib.agava.ru, https://en.wikipedia.org/w/index.php?title=Boeing_2707&oldid=979177506, Abandoned civil aircraft projects of the United States, Articles with dead external links from July 2011, Short description is different from Wikidata, Articles with unsourced statements from October 2019, Articles with unsourced statements from December 2016, Articles containing potentially dated statements from 2018, All articles containing potentially dated statements, Articles with disputed statements from November 2017, Articles with unsourced statements from December 2017, Creative Commons Attribution-ShareAlike License, This page was last edited on 19 September 2020, at 07:44.

[16][17] The Boeing team fell back on a tailed delta fixed wing. Would love to see one in the future. [9] A report from the Supersonic Transport Advisory Group (STAG) followed, noting that the European team was in the lead in basic development, and suggested competing by developing a more advanced design with better economics. [6], In spite of vocal opponents, questions about the technical requirements, and extremely negative reports about its economic viability, the SST project gathered strong backing from industry and the FAA. The package features FSX compatible gauges for the 2D panel, a new basic VC and new smoke effects.

The CL-823 lacked any form of high-lift devices on the wings, relying on engine power and long runways for liftoff, ensuring a huge noise footprint.

The content of the comments below are entirely the opinions of the individual posting the comment and do not always reflect the views of Fly Away Simulation. The inherently lower lift-to-drag ratios at supersonic speeds mean SSTs will have poorer fuel economy than subsonic designs. The 733-390 would have been an advanced aircraft even if it had been only subsonic. Considerable wind tunnel testing of the various models was carried out at NASA's Langley Research Center. In 1983, the building, complete with SST, was purchased by the Faith World church. This might have been delayed, but in May, Pan Am announced they had placed options on the Concorde. The design retained the high-mounted canard above the cockpit area, and the box-like engine area under the fuselage. [26] Afterward, letters of support from aviation buffs, containing nearly $1 million worth of contributions, poured in. Only one month later the FAA's new director, Najeeb Halaby, produced the Commission on National Aviation Goals, better known as Project Horizon. The SST was the topic of considerable concern within and outside the aviation industry. The Boeing 2707 was intended to be the first American supersonic airliner, but increasing outcry over the environmental effects, notably the sonic boom, led to its cancelation in 1971 before the two prototypes had been completed. If fuel costs were to change dramatically, SSTs would not be competitive.

The package features FSX compatible gauges for the 2D panel, a new basic VC and new smoke effects. [citation needed] By the 1980s, glass cockpits became standard on all large commercial jets and by the 2000s, most light aircraft were equipped with them. McNamara was highly skeptical of the SST project and savaged Halaby's predictions; he was also afraid the project might be turned over to the DoD and was careful to press for further studies. Compared to the other designs, the rounded nose profile and more cylindrical cross-section gave the NAC-60 a decidedly more conventional look than the other entries. The forward fuselage was on display at the Hiller Aviation Museum of San Carlos, California, for many years, but in early 2013, was moved back to Seattle,[39] where it is undergoing restoration at the Museum of Flight. When this occurred, Boeing's design was now the 300-seat Model 733-390. The latter became the most significant rallying point, especially after the publication of the anti-SST paperback, SST and Sonic Boom Handbook edited by William Shurcliff, which claimed that a single flight would "leave a 'bang-zone' 50 miles wide by 2,000 miles long" along with a host of associated problems. Lockheed's L-2000 was judged simpler to produce and less risky, but its performance was slightly lower and its noise levels slightly higher. However, it did this at the cost of greatly increased fuel use. The design emerged as a large aircraft with seating for 250 to 300 passengers and cruise speeds of approximately Mach 3. [29] The two prototypes were never completed. These problems were well understood within the industry; the IATA released a set of "design imperatives" for an SST that were essentially impossible to meet—the release was a warning to promoters of the SST within the industry. Gerald Ford, then Republican Leader, shouted Meany's claims that "If you vote for the SST, you are ensuring 13,000 jobs today plus 50,000 jobs in the second tier and 150,000 jobs each year over the next ten years." [21] More recent analysis in 1995 by David W. Fahey, an atmospheric scientist at the National Oceanic and Atmospheric Administration, and others found that the drop in ozone would be from 1 to 2% if a fleet of 500 supersonic aircraft was operated. Have you downloaded your copy of Microsoft Flight Simulator X: Steam Edition?

Sidney Yates, leading the "no" camp, offered a then-uncommon motion to instruct conferees[27] and eventually won the vote against further funding, 215 to 204. A "downselect" of the proposed models resulted in the NAC-60 and Curtiss-Wright efforts being dropped from the program, with both Boeing and Lockheed asked to offer SST models meeting the more demanding FAA requirements and able to use either of the remaining engine designs from GE or P&W.

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