YAK-9T Armament
 

In the hanger the "Information" description for the YAK-9T mentions that the YAK-9T has a 37mm Cannon in the nose. The "Weapon" description however lists a 20mm Cannon. Which is correct, does anybody know?

wikipedia (the internets most esteamed repository of FACT) says 37mm

So it seems safe to assume that the "Weapon" description in the BOP hanger is incorrect then and the "Information" description is correct.

Maybe have a go at some training missions with the Yak-3 and Yak-9T vs. 16 Po-2's to see if there is a noticable difference in weapon impact between those Yak's.

My reference book lists only a 20mm, for the type in general but mentions that the Yak 9-T was suitable for tank atack so I'd say 37mm.

Yak-9s were only mounted with a 37mm cannon in the nose, but were later reverted back to 20mm's. The "T" does not really mean Tank. Like the Yak-1M, the "M" stands for Moskit or Mosquito.

Its a pretty nasty weapon to have!! playing "chicken" with the yak-9..... nasty!!

The in-game Yak 9T has a 37mm cannon incorporated in the modelling... The statement about a 20mm cannon in the Encyclopedia is a misprint.

Source: Pavel Kulikov, one of the games designers