again few more pics for illustrating of some VISIBLE defects/problems of some soviet planes in flight...
1 yak-9 with vk-107a and oil on windshield...
2 yak-9 (d?) with not closing shutters of tail wheel...
3 "Воспроизведение в полете разрушения верхней поверхности обшивки крыла самолета Ил-2. ЛИИ НКАП\ 1943 г." from
"БОЛЕЗНИ 1943 ГОДА" (particularly impressionable or inadequate peoples - better not read

- or at first time, read
this)...
4 yak-9b with tail wheel (-8-10 kph by instruction), and, maybe, pilot just did not know about this, and not did recommendation like in la-5fn manual...
5 and example of field modification for specific weather conditions (lagg-3 of very early series)...
and, i accidentally invented joke, with funny game of words (like bad, mainly, prejudiced joke - лагг/lagg - лакированный гарантированный гроб/lacquered guaranteed coffin)...
Lavochkin -
Gorbunov -
Gudkov = LaGG...
but if...
Gudkov
Lavochkin
Gorbunov =
GuLaG...