Zamenjajte velika domača letala ztitanove zlitine
Leta 2006 je državni svet odobril ustanovitev velikega odbora za demonstracijo letalskih shem. Cao Chunxiao je edini član, ki se ukvarja z raziskavami letalskega materiala. Po začetku projekta je Cao Chunxiao deloval kot član strokovnega svetovalnega odbora in potoval po vsej državi. Projekt velikega letala zajema civilna in vojaška letala, šifra civilnega letala pa je C919.
The less weight an airplane has, the better. The weight of the airplane itself is a percentage of its total take-off weight, which is called the "structural weight coefficient of the airplane". In the past 70 years, no aircraft has had a structural weight factor of less than 27 percent , which is due to the performance of large components and the manufacturing capacity of large components. Titanium material becomes the key. Titanova zlitinamateriali in tehnologija kovanja lahko zmanjšajo strukturno težo letal in izboljšajo njegovo konkurenčnost.
Today, the more economically demanding C919 uses 8 percent titanium, comparable to 7.5 percent of the Boeing 777 in the U.S. Large aircraft can not be manufactured without large forgings which require high technology. In the column "Academician's Introduction", Cao Chunxiao shows titan forging joint for C919, named TC4, weighing 600 kg. To make similar forgings, China has built the world's largest 80,000-ton hydraulic press.
In November 2015, C919 with China's independent intellectual property rights was officially unveiled worldwide in Shanghai. Cao Chunxiao was thrilled at the scene and his dream of more than forty years came true at last.
5. maja 2017 je letalo C919 opravilo svoj prvi uspešen let v Šanghaju. Marca 2021 je C919 prevzel prvo naročilo. Do začetka leta 2022 je C919 prejel 815 naročil.
