From the photographer,,,



"I looked at the red one and it has a name written on it in cursive Cyrillic - it says "Favorite F-1". In Russian. "Favorite" is a noun in Russian, so that may be the name of the plane. Interestingly, "F-1" is spelled out in Latin characters rather than Cyrillic. The red plane also has the symbol of the Moscow Aeronautical Institute on it. "