I missed this thread earlier Erich. The Ilyushin IL-4 and the DB-3F are the same aircraft with small differences The Russians introduced a new designation system in 1940 and the DB became IL. The aircraft look very similar to the C-47 or LI-2 and it would be easy to misidentify them at night.

The IL-4 looks alot like the Douglas B-18 that was similar to the C-47 and DC-3 aircraft.

Early models of the IL had three 7.65mm ShKAS machine guns. The dorsal turret was manual. Later models had a 12.7mm weapon in the dorsal turret.
Crew was only three and the Russians classifed it as long range.


If you want to add to the confusion the Tupolev SB-2 looks similar to the C-47/IL-4 and the later models had a dorsal turret.

And if you want more then the Ilyushin Il-4 was also know as TsKB-26 or TsKB-30, DB-3, DB-3F, and Il-4. The soviet navy used them also.

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