Not my area either, but the one in the group photo is a Pe2. Those either side of this photo, one being re-fuelled, and the one with the pilot on board, is a DH Chipmunk, a post war British / Canadian - built 2 seat primary trainer. In the first pic, the second aircraft might be a converted Fokker DXII 2 seat trainer, and the inverted aircraft is possibly a Focke Wulf Stieglitz, or the Russian -built version, I think from Petlyakov, the name / number of which escapes me!