A bunch of unidentified aircrafts here
. This are photo's of photo's from a family encyclopedia from Kingdom of Yugoslavia. The text bellow does not tell what the types are. Translation is:
1. Big modern passanger aeroplane, monoplane (low wing), with pulled up gears during the flight, able to fly 8000km without landing.
2. Two engine passanger aeroplane, high wing.
3. Big passanger aeroplane with 8 engines 800 hp each.
4. Four engine three deck hydroplane in flight.
5. Aeroplane "amphibian" (Serbian word for amphibian) equipped with floats to land on watter and wheels to land on ground.
6. The newest type of helicopter with helices for vertical lift, which are contra rotating.
7.Low wing fighter with a gun shooting through the propeller.
8. Reconnaissance two seat airplane.
9. Seat for the machine-gun operator, that is lowered out and pulled in, due to the larger field of fire.
10. Antiaircraft gun.
11. Air ship (Zeppelin's).
Anybody have any idea what are the types, manufacturers...?