Zamijenite velike domaće avione salegura titanijuma
Državno vijeće je 2006. godine odobrilo osnivanje Komiteta za demonstraciju velikih avionskih šema. Cao Chunxiao je jedini član koji se bavi istraživanjem avio materijala. Nakon pokretanja projekta, Cao Chunxiao je bio član stručnog savjetodavnog odbora i putovao je po cijeloj zemlji. Projekat velikog aviona pokriva civilne i vojne avione, a šifra civilnog aviona 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. Titanijumska leguramaterijali i tehnologija kovanja mogu smanjiti strukturnu težinu aviona i poboljšati njegovu konkurentnost.
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 titanijum 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.
Dana 5. maja 2017. godine, avion C919 izveo je svoj prvi uspješan let u Šangaju. U martu 2021., C919 je preuzeo prvu narudžbu. Do početka 2022. C919 je primio 815 narudžbi.
