Is true that the Heinkel HeS011 appear as the instaled engine in the "in game" encyclopedia. IIRC the devs found that the tail will not be able to resist speeds over 700 km/h so they tunned the tail and plane somehow, so not sure the "projected" specifications you tried were even feasible.
I am aware of this, though I would like to know more regarding these findings, if this has been corroborated by various entities, etc.. Were new studies performed by Oleg and company or the post WW2 Soviet findings used alone? Design brilliance is achieving a solution which many deem impossible, so how the tail might have been strengthened, whether with the massive heavy 'fix' of the ubisoft developers, or another method is to me an open question pending further review. There's no doubt as to the outcome of the present 'fix' - an under powered aircraft. Like slinging a 500 lb. bomb on a P-51, permanently - time for real fun, huh?
In either case, the aircraft I referenced did not incorporate tail fixes, it was factored as specified by the designers projections, and I am therefore referring to what they had in mind, and it was awesome indeed.
p3