Дизайн узкофюзеляжных самолетов
G8000
Старожил
Добавлю материал по UpNext.
Есть некоторые детали которые ранее не упоминались
Есть некоторые детали которые ранее не упоминались
To make the profile adaptive, the demonstration wing’s trailing edge is fitted with three flaps. Each flap has four multifunctional trailing edges, or tabs, that can change position very quickly. Like a bird’s wing, the demonstrator’s wing will adapt to flight conditions—altitude, speed and aircraft weight. The flaps can retract to modify the chord, and the tabs can move to alter camber.
The aspect ratio on the converted Citation VII’s wing exceeds 15 (an increase from approximately 10 on an A320). The test wing spans approximately 20 m (66 ft.), including the 2-m movable tip sections. The design is representative of a commercial single-aisle aircraft at a one-third scale factor. Airbus UpNext tested a one-fourth-scale aerodynamic model in a low-speed wind tunnel at Airbus’ site in Filton, England, earlier in the project.
Aerotec & Concept, a specialist in business aircraft conversion, is in charge of carrying out the modification design. In June, Aerotec & Concept had installed most of the wing, overcoming the challenge of relatively unknown construction at the fuselage-wing interface on a non-Airbus aircraft. The modification includes metal transition boxes, measuring 1 m in span, on each side of the fuselage to link the root area with the composite wing. Each transition box also accommodates an attachment for the main landing gear. In addition, the box serves as a fuel tank because the composite wing does not carry fuel.
“Since June, we have installed the folding part of the wing and accompanying actuators at the interface,” Sébastien Blanc, X-Wing technical director, says. Technicians also reinstalled the engines, which the two companies had removed to protect them from the dust-generating process of cutting out the original wing. More recently, engineers have performed a power-on test and are now evaluating the wiring and interconnection system.
The replacement of the conventional flight control system took several months, and testing began Sept. 10. Airbus UpNext wants the control system to be representative of Airbus commercial aircraft, so the company decided to install fly-by-wire technology. Technicians are equipping the Citation with computers and local electric actuators. “Every control surface, including in the empennage, will be fly-by-wire,” Franck Delaplace, X-Wing demonstrator leader, says.
In parallel, the aircraft is receiving sensors dedicated to the test campaign. Videogrammetry—the use of video to measure how distances change between target objects—will contribute to various measurements. The X-Wing project will assess wing deformation, especially the movement of control surfaces, such as ailerons and spoilers. The technique relies on black circular markers on an easy-to-install stippled rendering.
To keep down costs of safety requirements, the aircraft is designed to fly uncrewed. Flight-test pilots will control the aircraft remotely from the ground, allowing Airbus UpNext to test the new technologies to their limits.
Technicians are removing the control columns and installing a remote control system, in addition to replacing the transparent windshield with a metallic one. In the cockpit, a lidar sensor will enable the aircraft to “see” turbulence 0.5-1 sec. ahead and move the control surfaces accordingly. “We already tested the dedicated communication system for remote control,” Blanc adds.
Airbus has applied to French civil aviation authority DGAC for a permit to fly. The demonstrator will take off from Cazaux, in the southwest of France, and fly over the Bay of Biscay.
Airbus UpNext plans to submit the aircraft to ground vibration testing also this year. Wing-loading trials—less severe than in certification tests—are planned to follow by year-end. “The idea is just to correlate test measurements with models,” Blanc says.
Taxi tests are scheduled for the second quarter of 2026, and the first flight is expected in mid-2026. “We can use the demonstrator until the end of 2026, and we intend to fly as many hours as possible by then,” Blanc says.
The aspect ratio on the converted Citation VII’s wing exceeds 15 (an increase from approximately 10 on an A320). The test wing spans approximately 20 m (66 ft.), including the 2-m movable tip sections. The design is representative of a commercial single-aisle aircraft at a one-third scale factor. Airbus UpNext tested a one-fourth-scale aerodynamic model in a low-speed wind tunnel at Airbus’ site in Filton, England, earlier in the project.
Aerotec & Concept, a specialist in business aircraft conversion, is in charge of carrying out the modification design. In June, Aerotec & Concept had installed most of the wing, overcoming the challenge of relatively unknown construction at the fuselage-wing interface on a non-Airbus aircraft. The modification includes metal transition boxes, measuring 1 m in span, on each side of the fuselage to link the root area with the composite wing. Each transition box also accommodates an attachment for the main landing gear. In addition, the box serves as a fuel tank because the composite wing does not carry fuel.
“Since June, we have installed the folding part of the wing and accompanying actuators at the interface,” Sébastien Blanc, X-Wing technical director, says. Technicians also reinstalled the engines, which the two companies had removed to protect them from the dust-generating process of cutting out the original wing. More recently, engineers have performed a power-on test and are now evaluating the wiring and interconnection system.
The replacement of the conventional flight control system took several months, and testing began Sept. 10. Airbus UpNext wants the control system to be representative of Airbus commercial aircraft, so the company decided to install fly-by-wire technology. Technicians are equipping the Citation with computers and local electric actuators. “Every control surface, including in the empennage, will be fly-by-wire,” Franck Delaplace, X-Wing demonstrator leader, says.
In parallel, the aircraft is receiving sensors dedicated to the test campaign. Videogrammetry—the use of video to measure how distances change between target objects—will contribute to various measurements. The X-Wing project will assess wing deformation, especially the movement of control surfaces, such as ailerons and spoilers. The technique relies on black circular markers on an easy-to-install stippled rendering.
To keep down costs of safety requirements, the aircraft is designed to fly uncrewed. Flight-test pilots will control the aircraft remotely from the ground, allowing Airbus UpNext to test the new technologies to their limits.
Technicians are removing the control columns and installing a remote control system, in addition to replacing the transparent windshield with a metallic one. In the cockpit, a lidar sensor will enable the aircraft to “see” turbulence 0.5-1 sec. ahead and move the control surfaces accordingly. “We already tested the dedicated communication system for remote control,” Blanc adds.
Airbus has applied to French civil aviation authority DGAC for a permit to fly. The demonstrator will take off from Cazaux, in the southwest of France, and fly over the Bay of Biscay.
Airbus UpNext plans to submit the aircraft to ground vibration testing also this year. Wing-loading trials—less severe than in certification tests—are planned to follow by year-end. “The idea is just to correlate test measurements with models,” Blanc says.
Taxi tests are scheduled for the second quarter of 2026, and the first flight is expected in mid-2026. “We can use the demonstrator until the end of 2026, and we intend to fly as many hours as possible by then,” Blanc says.
G8000
Старожил
статья о токсичных примесях в СКВ самолетов
constructor
Старожил
Смазочные масла загрязняют воздух? Других загрязнителей не должно быть в СКВ по идее.
G8000
Старожил
В компрессоре температура в несколько сотен градусов и если какое-либо уплотнение не держит масло то возможно оно попадает в систему отбора. В полете возможно в СКВ масло попадает из опор вала вентилятора и/или передней опоры вала высокого давления
Fed14400
Местный
антиобледенительная жидкость, гидравлическая жидкость, топливо со всеми присадками, выхлопные газы ...
G8000
Старожил
ГИдравлику и топливо с присадками можно сразу отбросить.
А вот с остальным, каждый случай нужно анализировать по отдетльности. По моменту происхождения разные внешние факторы могут оказывать воздействие. Наверное можно выделить два основных этапа: на земле - загрязнение кабинного воздуха в районе аэропорта и в полете. К тому же в привязке к двигателю отбор меняется в зависимости от режима работы двигателей: от последних ступеней компрессора на малых режимах и после первых (в районе 4й ступени) на режимах крейскрских. Это дает разную локализацию.
Кондиционерщики мамой клянутся что все загрязнения в системе отбора являются environmental в районе аэропорта и сравнивают замеры обычных систем с системой 787.
Я сам замечал что когда идет запуск двигателей в А320 в салоне воняет как в газовой камере. Возможно ли что выхлоп из двигателей забрасывает во входное устройство ВСУ?
constructor
Старожил
Последних ступеней КНД? Тогда после него ещё будет КВД и топливо и выхлоп никак не попадет в вентиляцию. А грязный воздух за бортом - это неустранимый фактор.
Fed14400
Местный
все, что используется в самолете и вокруг него, может пролиться и попасть во входное устройство ... а затем в компрессор и скв ... понятно, что действие кратковременное и концентрация невысокая ...
при использовании реверса выхлоп может отразиться от полосы и попасть во входное устройство и так далее ...
G8000
Старожил
если только самолет стоит на месте
Fed14400
Местный
не только ... зависит от конкретной конфигурации и скорости самолета, тяги двигателя, силы и направления ветра ... у вас же на 6000 все было ок, а на 5000 поначалу забрасывало выхлоп во входное на реверсе ...
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G8000
Старожил
Я не знал об этом.
G5000 был сделан путем укорачивания de-plugging фюзеляжа G6000 на 32 дюйма (две секции фюзеляжа) перед крылом. Дальнейшая эволюция в G5500 и G6500 была в первую очередь благодаря Pearl 15. Есть еще немного аэродинамики.
Внешний контур (OML) гондол двигателя и узлы навески прежние. Реверс одинаковый но не взаимозаменяемый )))
G8000
Старожил
Bjorn’s Corner: New aircraft technologies. Part 10. Engine choice - Leeham News and Analysis
April 28, 2023, ©. Leeham News: This is a summary of the article New aircraft technologies. Part 10P. Engine choice. The article discusses the engine architecture choices that must be made when developing the next-generation airliners. Engine alternatives... Read More
leehamnews.com
G8000
Старожил
Bjorn's Corner: Faster aircraft development. Part 8. Conceptual System design. - Leeham News and Analysis
September 19, 2025, ©. Leeham News: We do a series about ideas on how the long development times for large airliners can be shortened. New project talks about cutting development time and reaching certification and production faster than... Read More
leehamnews.com
G8000
Старожил
Интегрирование двигателей нового поколения в дизайн самолета. Part 10.
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G8000
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Bjorn's Corner: Faster aircraft development. Part 6. IT support. - Leeham News and Analysis
September 5, 2025, ©. Leeham News: We do a series about ideas on how the long development times for large airliners can be shortened. New project talks about cutting development time and reaching certification and production faster than... Read More
leehamnews.com
Fed14400
Местный
мы там на пару градусов измненили угол раскрытия реверса и проблему решили ...
G8000
Старожил
на Ту154М был хороший бюллетень (может 4581, не помню точно). Суть в том что при обжатии стоек, выпущенных внутренних тормозах и переложенном реверсе закрылок из посадочного положения 45 градусов переходил в 28. При этом двух щелевой конфигурации переход был на однощелевую и таким образом реверс использовался на меньших скоростях без подхвата выхлопа. На этом Глобале максимальный реверс до 50ти узлов. Тоже могли бы такой же бюллетень выполнить. Закрылки на нем композитные. Камешек прилетит и ремнотируй...
G8000
Старожил
Lessons Learned from Official Airline Reports of Onboard Fumes and Smoke
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G8000
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