Ibdel ajruplani domestiċi kbar biliga tat-titanju
Fl-2006, il-Kunsill tal-Istat approva t-twaqqif ta 'Kumitat ta' dimostrazzjoni ta 'skema ta' inġenji tal-ajru kbar. Cao Chunxiao huwa l-uniku membru involut fir-riċerka tal-materjal tal-avjazzjoni. Wara t-tnedija tal-proġett, Cao Chunxiao serva bħala membru tal-kumitat konsultattiv espert u vvjaġġa madwar il-pajjiż kollu. Il-proġett tal-ajruplani kbar ikopri inġenji tal-ajru ċivili u militari, u l-kodiċi tal-inġenji tal-ajru ċivili huwa 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. Liga tat-titanjumaterjali u teknoloġija tal-forġa jistgħu jnaqqsu l-piż strutturali tal-inġenji tal-ajru u jtejbu l-kompetittività tiegħu.
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 titanju 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.
Fil-5 ta 'Mejju 2017, l-ajruplan tal-linja C919 għamel l-ewwel titjira b'suċċess f'Shanghai. F'Marzu 2021, C919 ħa l-ewwel ordni. Sal-bidu tal-2022, is-C919 kien ħa 815-il ordni.
