soviet-russian engines

all you knows about the russian-soviet engines. we are plenty of topics with the whole plane, the weapons, the radars, even the electroci ecms,how use them, how are powerful etc. etc. but i am afraid to say, almost nihl about the engines, expecially those of older generations of aircraft: except the trhust nothing about them. I am a engine-lover-whetever is the type, and so i’d want to push the discussion about these items, and i think that even for the others it could worth to have more knowledge about.
he less known engines are about the R-15-29-35 and Al-21, the Rd-9 and al-7, despite they are so spread and produced for the Migs and Sukhoys, for not to talk about the tupolevs engines.

regs.