Yak-9T has HC-37 gun with following data:
length 3400 mm
max width 215 mm
max height 415 mm
Weight 171 kg
Rate of fire 240—260 shots/min
HE shell 732 g, including explosive weight 34 g, initial velocity— 865 m/sec.
After hit in 1-1.5 mm thick. duraluminum aircraft skin , HE shell makes hole with 0.46 m input diameter and 0.78 m output diameter
AP shell 770 g, initial velocity 810 m/sec.
From 200 m distance AP shell pierces 50 mm armor and from 400 m distance - 45 mm armor at 90 degrees (normal).
Charge weight (both for HE and AP) - about 210 g
Yak-9T (tank aircraft) has been produced from March, 1943 up to june, 1945. Total production q-ty - 2748 pcs.
HC-37 ammunition onto Yak-9T was 30 shells (in case of carefull loading of cartridge belt - 32 shells).
Yak-9T was 152 kg heavier than Yak-9 and had a little bit worse maneuverability, climb and speed data.
As usual, Yak-9T has been used together with Yak-9 and operated by experienced and keen pilots