Cooperation with China is one of the possibilities, but although theoretically the ASR is a non-aligned country, his main partner is the USSR, and cooperation with China would be limited to second-level programs with low technological content ... Moreover, in those years China still had little to offer in the naval field... Later, especially after the collapse of the USSR, and the improvement of QC on Chinese products, cooperation was increased significantly ...
Sure, the Chinese are not forward in ship development and quality at this point in time, that's why I mentioned co-development instead of import. If your Argentine yards and designers have good ideas and experience about how to outfit ships, and their concepts match the PLAN's, maybe China can make use of the ASR's development capability, while the ASR relies on China's material stocks and sheer building rate. But as you said, if quality is more of an issue than quantity, this is probably not happening in the first years. Another way is joint development with second-tier unaligned countries (Romania, Yugoslavia, Iraq? Vietnam?), like for the Orao.
About the powerplant, I'm also not 100% sure of the viability of the conversion, I am not a naval engineer, although I have seen more rare and complicated ones. The idea is that inside the APN there is still a mixture of Western influences, and I tried to reflect that in the design... (adding a light shipborne helo, for example, AFAIK almost unseen on other "eastern" navies) and when comparing other corvette designs ( as the Khukri, Tetal II, A69 or Joao Coutinho classes, among others), the vast majority used a 100% diesel propusion... Yes, a gas turbine engine will give few extra knots, but I think most of the time would be dead weight and wasted internal volume. The idea behind this design is that the Orca frigates would patrol acting as leader of other ships like Nanuchkas or other FACs, using its longer ranged sensors and helicopter for scouting (I modified the Alouette with an ORB-31 surface search radar to emphasize its role...), so I prefer to sacrifice some knots in behalf of a greater autonomy, but I will think more about it... I never went to something even close to a school of naval warfare, and my doctrines are totally homemade, based on what I read in books and internet... So probably are totally wrong... As I said earlier, this particular design has mutated a lot, and probably will keep doing it ...
Understood. Turns out you end up close to where the Project 1124.0 started before turning into a full-fledged frigate (
then known as the Novik): a large missile ship with its load of anti-ship missile, and enough hull to carry its own helicopter. Mind you, the Soviets never went anywhere with the concept, which always ended up as a complete 4000-ton multi-role frigate. Between Projects 1244, 1154 and 1166, this is a textbook example of unchecked feature creep
About propulsion, I don't doubt that your pure-diesel model makes sense for the mission; I was mostly concerned with the engineering involved in tearing out the turbine and a shaft (if you start with a complete), or the usability of the extra engine room for additional fuel for a new build. As in, as opposed to building a new hull from scratch around two large diesels.
I agree, but based on what I have seen and read, unfortunately for me (well.. I already knew, and had to assume it in this AU), in the socialist bloc the Navies have always been the "poor cousins"... At the same time, the Argentine rearmament program of those years was quite ambitious, even too much I would say... The Type 42 was at that time an state-of-the-art air-defence destroyer, and many top tier countries would have dreamt of having something like that on their navies... so I think the bar is set too high to compare it with a "socialist" navy...
Agree with you here, that the navy would not necessarily have been priority n°1 for the ASR. On the other hand, Bezobrazov has a point, and Argentina used to have significant blue-water big-ticket items (cruiser, carriers...), and it would be a bad decision for the country to let all that go, whatever the politics behind. However (again...) were these high-end capabilities anything more than white-elephant status symbols for Argentina? Were they actually useful in their national doctrine? But then we come back full circle...
To summarize, you have to decide two things:
1) What are the naval ambitions of your ASR? Pure survival, i.e. coastal defense against invasions? Control of its EEZ and sea lanes, where you need more OPVs and light frigates? Or regional hegemony where you absolutely need to keep an edge over your neighbors and intimidate larger powers?
2) What are the remaining capabilities after the revolution? Have any major ships been lost/scuttled/exiled? Are the crews and training centers still operational? Is your country embargoed and can you still get fuel for your ships? I have to go out on a tangent here to keep in mind that in most revolutions, the Navy is among the most conservative branches (See Britain, France, Russia, Iran...), and at least the officers might not get along with the plan. Means most of your HQ staff and best ship commanders will live the first day of the Glorious Regime of the Socialist Republic either a) on the first flight to Madrid or Miami, b) rotting in a prison cell, or c) tied up to a pole with a blindfold on, for a last cigarette in the sun
If it turns out that way (which depends on the social and political layout of your naval officer class), it will take years and lots of foreign assistance to rebuild capability, and in the meantime, as you suggested, it will be in the political interest of your regime to officially renounce their blue-water capability, which may then never come back.
The USSR, as I said, unfortunately for me, never exported anything bigger than a light frigate in quantity... A few Skoryy destroyers (already outdated in mid 70's), a single Kotlin, and (excluding India, that plays in a different league...) a single Kashin... that, I must said, I don't think it suit the needs of the ASR better than a modified Krivak... which, inexplicably to me, beyond a deliberate lack of intention of doing so, were never exported... And they even made less to promote local development of such vessels ... The only exception has been the Romanian Marasesti, and as far as I know, it has been proven itself very troublesome and a not very successful design...
Don't rule out India as an example either. Remember that they were nominally non-aligned (with other weapons suppliers than the USSR) and pretty much cash-strapped, but they had a lively shipbuilding industry, a strategically interesting location and regional ambitions. So the example of the Kashin Mod might not be as exotic as that for your ASR.
Regarding the other small-scale exports (to Poland and the like): in my understanding, the Warsaw Pact forces were pretty closely integrated with the Soviet forces, so that the single Polish destroyer (which makes no sense in a stand-alone navy) would be one more destroyer in a common WP squadron made up to 90% of Soviet ships. This cannot apply to your case, obviously, so even as a Soviet ally, you need your own green-water fleet, like India. Otherwise, open a large naval base to an officially non-existent rotating squadron of Soviet ships and airplanes, and fall back on coastal defense, like Vietnam. Depends on your naval ambitions and what's left of your capabilities, for which see above.
Edit: forgot to mention, but there is one class that you can order from the Soviets in the 80s to rebuild a nascent blue-water fleet:
Project 1135.1 Nerei/Krivak-III.
Larger hull, good sea-keeping, built-in helo hangar, low-cost low-density middle-range multirole weaponry, decent sensors.