Судя по всему, электроника 9М38 производства середины 70-х годов не позволяла реализовать более сложные траектории. Или идея увеличить дальность с помощью "горки" пришла позже, и ее воплотили "в железо" только в 9М38М1.
Don’t take me wrong and that I’m trying to disapprove something, but I’m kind of sceptic in this theory that 9M38 and 9M38M1 have significantly different trajectories and that later has longer range because of горка. If there is a range difference at all.
Back there in midd of 70’s when BUK and 9M38 was born, this same…I don’t know proper term…головка самонаведения, with index number 9Э50 which belongs to 9M38, was tested to be integrated in rockets 5V55 of S-300 system and rockets performed горка (let’s say горка although it’s not exactly what I consider as горка)
… can’t upload image of these trajectories, I will try later



