First attempt to convert
Pe-2 into ground attack aircraft was done in
Series aircraft received extra
pair of 20mm ShVAK cannons and 12.7mm
UB machinegun, installed under fuselage.
Later another Pe-2 was equipped with
two ShVAK cannons and two ShKAS
machineguns, also firing forward. All four guns could be turned synchronically down up to 40° (see picture).
In 1942 more powerful
attack version with MV gun pack, containing two
ShVAK cannons and two
UB was flown.
All three aircraft remained experimental and did not enter series
production because the 'niche' of ground strike and close support was occupied by
Il-2, built in large numbers.