Assuming that the gentleman in the foreground is not a giant, then it strikes me that you'd need a midget to pilot that machine. Even allowing for perspective, the depth of the fuselage, at the trailing edge of the wing, appears no greater than the distance between the gentleman's knee and heel - probably about 50cm. Could it be what today would be described as a large scale flying model aircraft? It might be interesting, Mechta, to enquire of the original poster, on the other forum, the dimensions of the propellor which he/she has and says originated from the machine depicted in the photograph. The propellor dimensions might help to give context to the machine.