Military Forum for Russian and Global Defence Issues
Scorpius wrote:Okay, guys. In the public domain, there are many photos showing the use of temperature control equipment on the departed "Angara". roscosmos "mistakenly" posted a notification that the upper stage with the load was taken to the "orbit of existence". Фnd you still think it was a mass-dimensional layout?
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PhSt wrote:Development of Angara-A3 medium-class rocket possible, but not obvious - Roscosmos
So far, Russia has carried out only two Angara launches, both of them from the Plesetsk spaceport: a light Angara-1.2PP blasted off in July 2014 and its heavy version lifted off in December 2014.
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The successful launch in December gave hope that the intricate history of the Angara family of missiles has finally entered a predictable course. The next, third in a row, flight test of the heavy "Angara-A5" will take place in the coming months, and in total, six launches must be carried out before receiving the go-ahead for mass production. The main customers - the Roscosmos State Corporation and the Russian Ministry of Defense - believe in the new rocket. The fact is that, despite a number of interesting proposals for launch vehicles, the Angara will become a key carrier for the next decade in terms of supporting the most ambitious Russian space projects and regaining leadership in the launch services market.
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kvs wrote:That's some flowery language for a Roscosmos piece. You would think that it is all touch and go and that everything is 100% uncertain
and the Angara is a matter of "faith". ...
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The Proton-PM company (part of NPO Energomash integrated structure of Roscosmos) has started to master production of the RD-191M engine, a modified version of the RD-191 for Angara launch vehicles. The first unit is to be manufactured in the beginning of 2023, the same year NPO Energomash will start testing it.
The RD191M is a modification of the RD-191 engine boosted by 10%. The engine will perform the assigned tasks during launches of heavy versions of Angara rockets from the Vostochny Cosmodrome, including crewed program. To do so, the developers have introduced a number of changes to the product.
‘When creating the RD-191M, the design and technological groundwork for the RD-191, RD-171M, RD-180 and RD-181 engines is used to the maximum, significantly reducing development costs,’ says Pyotr Lyovochkin, NPO Energomash Chief Designer. ‘In 2021, we will fully release the engine design documentation and hand it over to the manufacturer.’
Under the agreement signed in December 2020, Proton-PM will manufacture three RD-191M engine prototypes. The first one is intended for development tests, the second for final development tests, and the third for interagency tests.
‘For the first time since the beginning of the development of the RD-191 engine at Proton-PM, a contract was signed not for individual components, but for the product as a whole, which greatly facilitates the development process,’ the engine project manager Igor Timshin adds. ‘It is also important to take into account that the units and assemblies assigned to the enterprise make up about 40% of the RD-191 production labor intensity, and the RD-191M engine has a high degree of continuity with the prototype.’
To master the production of RD-191M, over 1,200 new technical processes and 3,500 tooling designs will be necessary to release. In addition, in 2020–2022, six existing testbeds will be modernized, five more to be designed and manufactured. The RD-191M engine assembly site is to be organized in the first quarter of 2022. It will be located at a suburban production site in the new building 82.
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MOSCOW, August 25 - RIA Novosti. The third launch of the Angara-A5 heavy-class launch vehicle from the Plesetsk cosmodrome is planned for the first half of December, two sources in the rocket and space industry told RIA Novosti.
"The launch of Angara-A5 with a new Perseus upper stage and a mock-up of a spacecraft from Plesetsk is scheduled for the first half of December," the agency's source said.
Earlier it was reported that the Khrunichev Center, under a contract with the RF Ministry of Defense, is to produce six Angara-A5 missiles for flight tests. Two of them have already departed in 2014 and 2020 with the Briz-M upper stages and spacecraft mock-ups.
In addition, the enterprise, by order of the military department, is to produce four serial Angara-A5 missiles. In December 2020, the general director of the Khrunichev Center, Aleksey Varochko, said that they would be delivered to the customer in 2022-2024.
Angara is a family of environmentally friendly launch vehicles of various classes. It includes light carriers "Angara-1.2", heavy ones - "Angara-A5" and modernized "Angara-A5M", increased carrying capacity - "Angara-A5V".
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PARK PATRIOT (Moscow region), 25 Aug - RIA Novosti. The first oxygen-hydrogen upper stage of KBTK, which will significantly increase the carrying capacity of the Angara launch vehicle , is planned to be launched in 2027, Sergey Kuznetsov, general designer of the Salyut design bureau (part of the Khrunichev Center), told RIA Novosti.
"At present, Roskosmos has begun to actively fund the KVTK theme. The work has been fully launched. We have defended the draft design and are now at the stage of issuing design documentation and manufacturing stand products," he said at the Army-2021 International Military-Technical Forum.
“We hope to complete this work on time and launch the first aircraft in 2027, most likely on the Angara-A5M launch vehicle,” Kuznetsov added.
In December 2020, Roscosmos signed a contract with the Khrunichev Center in the amount of 20.6 billion rubles for the creation of an oxygen-hydrogen upper stage at KBTK. In the course of the work, which is planned to be completed by December 2025, it is planned to make models and prototypes, as well as conduct their tests.
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Russian Defense Minister Sergei Shoigu arrived on a working trip to the Plesetsk cosmodrome, Zvezda correspondent Pavel Remnev reports. He is accompanied by Russian Deputy Defense Ministers Timur Ivanov and Alexei Krivoruchko.
The head of the Russian military department will check the progress of modernization of the assembly and test building of the cosmodrome, where the heavy Angara-A5 launch vehicle is being assembled and tested.
Shoigu also heard a report by the Commander-in-Chief of the Russian Aerospace Forces Sergey Surovikin on the planned launches of Angara-class missiles until 2027. Surovikin also reported on the schedule of flight tests of the Angara-A5 and the progress of the tests of the Perseus upper stage complex.
As reported to the Minister of Defense Surovikin, the new assembly and test complex at the Plesetsk cosmodrome will be commissioned by the end of this year.
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Big_Gazza wrote:
Image of the 3rd A-5 stack being assembled in the MIKS. 3L has the Persei (Blok-DM-03) upper stage, so is noticeably larger than the 1st/2nd units with Briz-M
You're confusing modifications. You named the total mass of the Briz-KM upper stage, which is used for Rokot rockets. The main modification, "Breeze-M", takes on board up to 20 tons of NDMG + AT. In addition, the Perseus unit can take up to 18.7 tons of kerolox. The difference in the total mass of the components is due to the fact that kerolox has a slightly higher specific impulse compared to NDMG+AT. The difference in size is due to the fact that NDMG+AT has a higher density than kerolox, therefore, requires a smaller volume of tanks.Big_Gazza wrote:Blok-DM-03 is a modernised variant of the original Blok-D that was developed for the cancelled N-1 manned lunar rocket. Its bigger than Briz mainly because it is a much higher capacity stage (17.3 T vs 6.5 T for Briz).
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Scorpius wrote:You're confusing modifications. You named the total mass of the Briz-KM upper stage, which is used for Rokot rockets. The main modification, "Breeze-M", takes on board up to 20 tons of NDMG + AT. In addition, the Perseus unit can take up to 18.7 tons of kerolox. The difference in the total mass of the components is due to the fact that kerolox has a slightly higher specific impulse compared to NDMG+AT. The difference in size is due to the fact that NDMG+AT has a higher density than kerolox, therefore, requires a smaller volume of tanks.Big_Gazza wrote:Blok-DM-03 is a modernised variant of the original Blok-D that was developed for the cancelled N-1 manned lunar rocket. Its bigger than Briz mainly because it is a much higher capacity stage (17.3 T vs 6.5 T for Briz).
and find that another reason why the Briz-M stage is shorter than Blok-D is that the Briz-M core stage (based on KM) sits inside a jettison-able toroidal outer tank and is a very compact design with good volume utilisation. Blok D on the other hand has an ellipsoidal LOX tank sitting above a toroidal kerosene tank and is much less efficiently stacked. Briz M contains more propellant's by volume, yet is only 2.6m in length, compared to 6.3m for Blok-D.GarryB likes this post
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