Guessing wildly into the blue:
How is that Russian aircraft called that was used during night time? The Germans called it Nähmaschine... don´t know whether it would fit in the time period the devs are aiming for though.
Another possibility could be the BF 110. Deployed as a nightfigther, but also as a ground-attack aircraft in the east.
Propably something different though. The knife sounds more reasonable. But guessing is the fun part in this.