Since you resurrected this thread I'll throw in my 2 cents as usual when it comes to commie birds
We can agree that this was not important for the soviet designers. Ok for soviet planes in the 70s, 80s and 90s but moderns russian planes has the same design considerations than western ones and this is not considered in game.
Simply put the majority of fuel consumption data for Soviet planes in AWS is simply wrong. It has nothing to do with "gas is free in USSR" mentality. While some planes were simply atrocious when it comes to fuel consumption (Il-86 never received planned engines and used underpowered ones) most were reasonably matched against western counterparts.
It's quite easy to find official documentation for all those planes but there are 2 big problems:
1. It's all in Russian and the scan quality is often poor
2. Flight manuals are often 400+ pages long, use different methods for data presentation and thus require significant amount of time to dig through.
Couple months back I researched couple planes (IIRC: Yak-40, Tu-104, Il-12/14, Il-18) and compiled data for Sami, who gladly corrected it.
I don't have time to further research it but for example Il-62's average fuel consumption in AWS is similar to full-thrust take-off average in the documentation with cruise average being couple thousand kg/h lower.
If we can find some volunteers with at least basic Russian skills it should be easy to correct fuel consumption and range data but it requires dozens of manhours.
Why a soviet plane with the same age and condition as a western one has to pay double for maintenance actions?
This is a valid question, especially planes designed to be maintained outside major airports should get some discounts.
Why an Il-62 (for example) has double turnaround time than a DC-8 that is a bigger plane? I´m surprised about how the nationality of a plane has influence in the time needed to put the catering and the fuel on board.
Very bad example :-) One of the drawbacks of the original Il-62 design was the lack of a cargo bay roller transfer system. This and some other problems meant that it was extremely slow to prepare. Most of these problems were corrected with Il-62M but AWS limitation of single turnaround time for one aircraft family comes into play. Some other Soviet planes were also designed with "baggage in hand" system in mind which also I believe is represented by longer turnarounds.
Generally turnaround mechanic needs an overhaul in AWS.
I think we need a call for volunteers who speak Russian