You have it
AfgAirOps; it is the Myasishchev M-52 Well done
What was intended to be the production Bounder, fitted with the engines it was designed for, the Zubets 16-17 turbojets replacing the original Dobrynin units of the M-50 "proof of concept" prototype, whose lack of power rather limited its preformance. One M-52 was completed but was never tested in the air before the program was terminated due to the development of the ICBMs and the priority assigned to the Soviet space program..
AfgAirOps has control, please post a new challenge or declare an Open House