Finally I could research DB-3 and Il-4 in Russian book.
Quote:
Originally Posted by Pibwl
79 Il-4 - used from mid-40 (now 2/42) (actually, only from 3/42 DB-3F was renamed Il-4, what might explain its late introduction). 2500 kg was max load.
418 DB-3 - used from 1937/38, might be 1/38 (now 4/39)
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In fact, both aircraft carried the same load, but they couldn't carry 25 x 100 kg nor 10 x 250 kg bombs - there were only ten racks for max 100 kg bombs in a bomb bay and three racks for bigger bombs under a fuselage.
Maximum number of bombs was 14 x 100 kg (possibly two bombs on one central rack?).
Bigger load was 10x100 kg and 3x250 kg.
Maximum load 2500 kg for close distance was apparently 10x100 kg, 2x250kg and 1x1000 kg.