Цитата Сообщение от Котков Андрей
So SPS system vas mounted on both submodifacations MiG-21PFM.
Thank you very much for the informations but I do not draw the same conclusions than you. Here are mine:
1) MiG-21 PFMs either had single or two pieces canopies (a lot of people would disagree to that)
2) MiG-21 PFMs in 1969 all had the SPS

What about first production MiG-21PFMs built in 1964 ? If all PFMs had SPS flaps, what's the version of Kiev's MiG-21 which appears to have Fowler flaps ?
Thanks again for prooving that PFMs could have PF type canopy and seat !

Laurent