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Future ISS Russian modules

The launch schedule for future Russian modules and the final composition of the Russian segment is still somewhat uncertain, and rather confusing! They seem to keep getting pushed back, and the funding cuts to Roskosmos announced in December 2015 will only make this worse – they may never launch at all.

ISS Russian modules launch schedule (updated April 2017)
Date Module Launcher
Late 2017 MLM (FGB-2), Multifunctional Laboratory Module, Nauka (“Science”)
МЛМ, Многоцелевой Лабораторный Модуль, «Наука»
Proton-M rocket
Late 2018 or early 2019 UM, Node Module
УМ, Узловой Модуль
Progress M-UM 303 on a Soyuz-2.1b rocket
Mid-2019 NEM-1, Science-Power Module-1
НЭМ-1, Научно-Энергетический Модуль-1
Proton-M (or Angara A5) rocket
201? NEM-2, Science-Power Module-2
НЭМ-2, Научно-Энергетический Модуль-2
Proton-M (or Angara A5) rocket

According to the Novosti Kosmonavtiki article, «Программа развития российского сегмента МКС» (ISS segment development program):

Therefore, by 2015 the ISS RS will include 8 modules: FGB Zarya, SM Zvezda, MLM, MRM-1-CDM, MRM-2-DC2, NM, SPM-1 and SPM-2. The RS total mass would be 122 tonnes, the pressurized volume up to 400 m³, and a power capacity of 80 kW.

Such a projected configuration of the ISS RS allows, if required, to start independent flight of the RS as a separate Russian orbital station.

The full-scale deployment of the RS will allow a continuous Russian presence in space, will provide an opportunity for fundamental scientific research, will give a chance for development of unique new materials, and will provide an opportunity for additional commercial services in space. In a longer-term perspective the ISS RS could be used for development, assembly and maintenance of lunar and interplanetary flights.

The ISS RS development program is approved by the Scientific and Technical Council of RKK Energia and Roskosmos management. It should now get the endorsement of the Russian government and receive full financing. Only in this case the full-scale ISS RS could be completed.

Below are details of some of the Russian modules, listed in flight order. To make things more confusing, these have more than one name! I refer to them by the transliteration of their Russian acronyms.

Multifunctional Laboratory Module (MLM/FGB-2)
Многофункциональный Лабораторный Модуль

The MLM, named Nauka («Наука», “Science”), is to be launched late 2018 (no sooner than August) to 2019 (as of 2017 TASS report), and will occupy the nadir port of the Zarya module. It has been beset by delays – in 2013 a leaking fueling valve inside the propulsion system was found during tests, so it was sent back to GKNPTs Khrunichev for repairs. (Via the MLM thread at NASASpaceflight.com)

As of January 2017, work had restarted on the MLM, with a goal launch date of December 2017, though it would shorten pre-flight testing time.

The MLM was created as a backup for the FGB in 1995 by GKNPTs Khrunichev (it was originally designated “FGB-2”). It has been modified since to accommodate the reduced configuration of the ISS.

The MLM was included in the configuration of the Russian segment in the documents:

On 3 November 2006 a government contract between Energiya and Roskosmos was signed to begin development of the MLM. Energiya was the prime contractor; subcontractor companies included M.V. Khrunichev GKNPTs, NIITP, RNIIKP, NIIAO, VNIIEM, NPP Kvant, NIIMASh, Submicron and NPP Zvezda.

The tasks of the MLM are:

The MLM will use the probe-and-drogue docking system (see ISS docking systems page) to accommodate Progress and Soyuz spacecraft.

MLM: Fundamental technical characteristics
Mass at launch 20,300 kg
Mass in reference orbit to 24,000 kg
Volume in the sealed compartment for scientific gear 4 m³
Pressure volume 70 m³
Mass of scientific gear to 3-x tons
Quantity of the universal work sites 12
Parameters of reference orbit
• Maximum height 350 km
• Minimum height 185 km
• Orbit inclination 51.6 0

Node Module (UM)
Узловой Модуль

This module is required to attach the Science Power Modules and to provide extra docking ports (5 in total). It is to be launched in 2013. Its name might be «Причал» (Prechal, Mooring/berthing).

UM: fundamental technical characteristics
Mass 4000 kg
Pressurized volume 14 m³
Available docking ports 5

Science Power Modules 1 & 2 (NEM)
Научно-Энергетический Модуль-1 и -2

These two modules (NEM-1 & -2) are required to ensure an independent power supply to the ISS Russian Segment; they will have 48 kWt capacity each. In accordance with an agreement with NASA, the RS is partially supplied with power from the American segment, but this is possible only till 2015. For further RS operations it should have its own power system, and it is envisaged to have 2 similar modules for this purpose: SPM-1 in 2014 and SPM-2 in 2015. They would be launched by Proton-M rockets and would be docked to the port and aft docking ports of the UM.

NEM: fundamental technical characteristics (for each one)
Mass 20,000 kg
Diameter 4.1 m
Length 25.3 m
Dimensions with the fully deployed solar arrays and radiator 26.5 х 25.3 х 10.5 m
Pressurized volume up to 150 m3
Pressurized volume for scientific equipment 12 m3
Solar arrays power capacity 36 kW
Workplaces 12

European Robot Arm (ERA)

The 11-meter ERA is one of ESA’s main contributions to the ISS. It is a joint project between ESA and the Russian Federal Space Agency, Roscosmos, and is developed by Dutch Space. Similarly to the Canadarm-2 on the U.S. segment, the ERA will be used to move around up to 8 tonnes of cargo and experimental equipment, utilize its videocameras to inspect the Station’s exterior and also transport spacewalkers to different parts of the Station. It will be able to autonomously “walk” around the Station using prefixed base points. It is to be launched by a Proton rocket as part of the MLM module. However, with the delays with the MLM, it may not be launched as funding for it from ESA is to be cut in 2014.


Some are from this NSF thread.

Updated 2:42 PM Thursday, 6 April 2017