Distinctive features of making holes in the mixed stacks from composite, titanium alloys and aluminum alloys

The report is devoted to searches of solutions of a problem of high-quality holes cutting in mixed stacks Comp-Ti-Al provided by a design of tail and centre-section of the prospective MS-21 airplane. Whether can deduce technology of airplane units assembly using of advanced drilling unit (ADU) on the new level which hasn't been reached by the Russian aviation industry so far? Whether there will be such application economically and technologically reasonable? It is possible that our experience and experience of the leading foreign aircraft-building companies will help us to answer these questions.