Originally Posted by TiredOldSoldier

I don't think it's a variation of one of the second generation water cooled engined soviet monoplanes fighters that got into production LaGG-3, MiG 1/MiG 3 and Yak 1 as all of those had ventral not nose radiators. More likely a competing design from some other team. Tupolev is best known for large planes so it could be a Bartini design, the dates for his bureau match what you said but the only Bartini fighters are can find are the much earlier earlier Stal-6 and Stal-8 designs.