Pardon to be again the one who ruins the party, but they so far didn't get the much smaller and simpler Il-112 ready and now you expect "four new transport aircraft types"??
The Il-112 failed because they didn't have a proper engine for it. They had to make a forced engine. It broke itself to pieces, flamed out, burned the wing, and the aircraft crashed.
There are also doubts if the wing area in Il-112 was appropriate. Given that the management or the designers decided to make a single piece wing which was constrained in size due to manufacturing technology, contrary to the opinion of the aircraft manufacturing plant, this might have meant the aircraft didn't have enough lift to make an unpowered landing.
In the Il-112, unlike in the other large aircraft projects, they also didn't do any wind tunnel testing and relied on performance numbers from computer simulations. From what I know TsAGI was not involved in the project at all. This is highly unusual to begin with.
The PD-14 is already available for the MC-21. The PD-8 will be available for the SJ-100. Back when Il-112 was started the PD-8 engine wasn't available. Heck, it isn't even in serial production yet. But PD-8 is low risk. It is basically a scaled down PD-14 engine core mated to the fan section of the SaM-146 engine. It already passed flight tests on the Il-76 test aircraft. It is currently being used in ground tests in a SJ-100 platform. It should enter serial production in a year or two.
The reason for the Russians not making their own transport aircraft in these classes sooner is that Russia before 2014 had projects with Ukraine to jointly develop such aircraft. The An-140T and the An-70. Now that they are free from such hindrances, once they have appropriate engines it is a matter of time until it happens.
If required they will just move designers from the other design bureaus which make the civilian transport aircraft to get the project to work. Once SJ-100 and MC-21 projects enter serial production. The Il-112 was mostly designed by inexperienced engineers with no prior working experience.
As for them not starting production of any military transport aircraft, like the article itself states, the Il-76MD-90A is basically all new production. The original production facilities were in Uzbekistan and the tooling is all still there. The Russians had to make new tooling, redesign the wing, use different avionics, engines, etc. The only thing is they didn't do was design a new airframe. They just copied the older design.
The Russians had previously started production of the An-140 in Russia. But due to the fallout with Ukraine production of this aircraft was ceased. Hence this rushed project to develop the Il-112.
This new PD-8 aircraft will basically be an An-72 replacement. The An-72 was originally designed to replace the An-26. Which was what the Il-112 was aiming to replace as well. Shoigu already announced it is to be developed.
As for the other aircraft they are just what makes sense really.
There was a project to develop the Tu-330 medium transport aircraft as a counter to the An-70. Because of the Ukraine lobby the An-70 project was pursued. Then after relations with Ukraine collapsed the Il-276 was supposed to be the replacement for this aircraft. But then this project was frozen because back then the PD-14 engine still had not finished development and Ilyushin were busy starting production of the Il-76MD-90A.
One of the projects that Shoigu also mentioned seems to be a twin engine replacement for the Il-76MD-90A. But I doubt this would be designed in the short term. For one the engines for it aren't available yet. PD-28 or better engines would be necessary.
The Russians have more than enough engineering resources to develop these aircraft once the SJ-100 and MC-21 projects start serial production. Between the teams from Sukhoi (developed SJ-100), Irkut (developed MC-21), and Beriev (developed Be-200), they can develop these aircraft.
