Not quite, as Soyuz-5 is essentially going to be a modernised Zenit, and they were products of Yangels design bureau (now called Yuzhnoye). RSC Energia is the current name of Korolevs old OKB-1......
Zenit and Energia are practically same thing.
Zenit uses RD-171 which is basically same engine as Energia (RD-170) with altered electronics and different fuel tanks. Rocket is 90% identical to Energia. What Ukranians did was to take Energia strap-on booster, tweak it a bit and give it a new name in order to project an illusion that they designed something new which they most certainly did not.
Just look at Soyuz-5/Sunkar situation. It is literally same thing but almost everyone is convinced that Sunkar is something new that was created with some contribution from Kazakhs. Nothing could be further from the truth but that's marketing for you.
Here is wiki:
Building on the technology from the Energia launch vehicle the Zenit (rocket family) was developed, which uses a RD-170 variant, the RD-171. While the RD-170 had nozzles which swiveled on both axes, the RD-171 swivels on just one axis. RD-171 was intended to be used on Zenith rocket, and one-axis swiveling allowed to avoid additional aerodynamic forces. .....
Simplified redesign but basically same thing.
......Now that I've had some time to think it all through, I think ditching Angara-5P for Soyuz-5 is a good move. Baikonour, being more southerly, is better for meeting ISS-type orbits, and the program locks in Kazakh involvement and their paying for Zenit pad upgrade. Soyuz-5 modules lead to SHLV capability, which Angara never could. Angara won't require man-rating, so that saves some cash that is better spent elsewhere, such as high-energy upper stages.......
Angara was a good project and it could have been used as basis for manned and super-heavy launcher. RD-191 is also Energia derivative although quite improved.
Krunichev should have designed a larger core for super-heavy rocket with multiple engines. They had everything they needed.
Problem is that Krunichev never wanted to create super-heavy launcher. Neither did they want to build manned rocket, to move away from Baikonur, to launch rockets from Vostochniy, to pursue deep space missions nor leave their comfy Moscow headquarters and move to Omsk.
They basically never wanted to move on from Proton-M and their little commercial launch scam.
They muscled into Angara project and then intentionally wasted decades procrastinating and promoting obsolete Proton rocket. When original super-heavy project was put on ice in 2014 they thought that they were in the clear. All they had to do then was to scuttle Angara altogether and sabotage transfer to Vostochniy.
But they forgot that Vostochniy is too big and too important to fail. It was also a chain with which Kazakhstan was whipped into submission.
Later when super-heavy project was restarted Krunichev was promptly dumped and Energia corporation was put on the job.
There is still room for Angara but it is in light and medium segment. Maybe Sea-Launch as well if they have enough brains to pursue it. And it will be just a sideshow for Soyuz-5 and backup for Soyuz-2.1 way down the road. They made their bed.
My only lingering issue is that Federation manned vehicle will only be flyable from Kazakhstan, and not from Russian territory until the SHLV pad comes along in 2030. As long as the Russia-Kazakh political relationship remains stable, that is no issue, but never discount the potential for upset due to fucking Yankistani sedition.... Most of us expected the Ukropi to remain sane, but Uncle Scam interfered and it all went tits-up....
There is not enough time left for Kazakhs to do anything stupid. They may try but with Vostochniy in play whatever problems they cause will be temporary.
Like with Ukrainian ship turbines it will buy them couple of years at most. Construction projects can always be fast-tracked if need arises. Just look at Kerch Straight Bridge. Launch pads are nothing compared to that.
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Colossal error in article, super-heavy is not related to Angara. See what I was talking about when I mentioned marketing?
Sputnik needs some extra staff...