The TO-55 in War Thunder is a Premium Medium Tank that has a FLAME THROWER! That's right, a high tier Flame Tank that actually has some trouble getting frags with it!
The TO-55 is at 8.0 which is the lowest BR T-55 in the game. As such this vehicle does not get access to the APFSDS round. That's not a problem, though. The best shell is the APHE and we all know it! 🙂
The 100mm is stabilized and is more than enough to deal with most opponents that are thrown at you. The TO-55 party piece is of course the flame thrower. It works on open top SPAA like the M42 and ZSU-57-2 but fails to roast things like the M113 TOW, the M163 and other things like the UDES 33. Disappointing but hopefully this is fixed to give it some viability.
What it is REALLY good at doing is blinding enemies with thick black smoke and fire! It's also just really cool to watch.