Progress Spacecraft

The Progress () is a Russian expendable cargo spacecraft. Originally developed for the Soviet space program and derived from the crewed Soyuz spacecraft, Progress has been instrumental in maintaining long-duration space missions by providing consumables like food, water, and air, as well as maintenance equipment. Since its maiden flight in 1978, Progress has supported various space stations, including Salyut 6, Salyut 7, and Mir, and remains a key resupply vehicle for the International Space Station (ISS).

Each Progress mission delivers thousands of kilograms of supplies in its pressurized module. It also carries water, fuel, and gases to replenish the station's resources and sustain its onboard atmosphere. Beyond resupply duties, a docked Progress can maneuver or reboost the station, countering atmospheric drag and maintaining its operational altitude. When a Progress spacecraft nears the end of its design life, it is loaded with waste, undocked, and deorbited to safely disintegrate in Earth's atmosphere.

, there have been 182 Progress flights, with only three failures, all occurring between 2011 and 2016. Typically, three to four Progress flights are launched to the ISS each year. Due to the variation in Progress vehicles flown to the ISS, NASA uses its own nomenclature where "ISS 1P" means the first Progress spacecraft to ISS.

Design

The Progress spacecraft shares much of design with the crewed Soyuz spacecraft but with several modifications to make it better suited to cargo transport. It consists of three distinct sections:

* Cargo Section: This pressurized compartment carries supplies for the crew, including maintenance items, prepackaged and fresh food, scientific equipment, and clothing. Its docking drogue, similar to that of the Soyuz, features ducting that enables fuel transfer (described below).
* Tanker Section: Replacing the Soyuz’s reentry module, this unpressurized compartment houses two tanks containing unsymmetrical dimethylhydrazine (UDMH) fuel and dinitrogen tetroxide () oxidizer. Ducts run from these tanks around the outside of the pressurized module to connectors at the docking port, allowing automated fuel transfer. This design prevents any potential leaks of the toxic propellant from contaminating the station's atmosphere. This section also contains water tanks.
* Propulsion Section: Located at the rear of the spacecraft, this unpressurized compartment remains largely unchanged from the Soyuz design. It contains the orientation engines used for automatic docking and can be utilized to boost the station's orbit once docked.

The Progress spacecraft’s uncrewed and disposable design enables significant weight reduction. Unlike Soyuz, it does not require life support systems, heat shields, parachutes, or automatic crew rescue systems. Additionally, it lacks the ability to separate into multiple modules. After completing its mission, the spacecraft undocks, performs a controlled retrofire, and burns up upon reentry into Earth's atmosphere.

Versions

Five major variants of the Progress spacecraft have been flown so far: Progress 7K-TG (1978–1990), Progress M 11F615A55 (1989–2009), Progress M1 (2000–2004), Progress M 11F615A60 (2008–2015) and Progress MS (since 2015).

In addition, three custom Progress M variants were launched to deliver ISS modules '' Pirs'' in 2001, '' Poisk'' in 2009 and '' Prichal'' in 2021.

Progress 7K-TG (1978–1990)

There were 42 spacecraft built using the initial Progress design, the last one being launched in May 1990.

The bureau in charge of designing the freighter was TsKBEM (now RKK Energia). They began work on the design in mid-1973, assigning Progress the GRAU index 11F615A15. The design was complete by February 1974, and the first production model was ready for launch in November 1977. Progress 1 launched on 20 January 1978 aboard the same rocket used to launch the Soyuz. It still featured the same launch shroud as the Soyuz, though this was purely for aerodynamic purposes as the launch escape system had been deactivated.

This first version of Progress had a mass of and carried of cargo, or 30% of its launch mass. It had the same diameter as the Soyuz at , but was in length – slightly longer. The autonomous flight time was 3 days, the same time as that of the Soyuz ferry. It could spend 30 days docked. Progress always docked to the aft port of the station it was resupplying (the aft being where the main rocket engines of the station and their tankage, for refueling by the Progress, are located).

* Launch mass:
* Mass of cargo:
** ~ (before Progress-24)
** ~ (from Progress-24)
* Length:
* Diameter of cargo modules:
* Maximum diameter:
* Volume of cargo compartment:

Progress M 11F615A55 (1989–2009)

The upgraded Progress M (GRAU: 11F615A55, manufacturer's designation: 7K-TGM) was first launched in August 1989. The first 43 flights all went to Mir; following Mir's re-entry, Progress was used as the resupply vehicle for the International Space Station. As of December 2020, there have been over 80 flights (over different configurations) to the ISS and more are scheduled.

The Progress M is essentially the same spacecraft as the Progress, but it features improvements based on the Soyuz-T and Soyuz-TM designs. It can spend up to 30 days in autonomous flight and is able to carry more. Also, unlike the old Progress crafts, it can return items to Earth. This is accomplished by using the VBK-Raduga capsule, which can carry up to of cargo. It is long and in diameter and has a " dry mass" of . Progress M can also dock to the forward port of the station and still transfer fuel. It uses the same rendezvous system as the Soyuz, and it features solar panels for the first time.

* Launch mass:
* Cargo mass:
* Dry cargo mass:
* Liquid cargo mass:
* Length:
* Diameter of cargo modules:
* Maximum diameter:
* Dry cargo compartment volume:
* Solar array span:

In addition to the traditional Progress-M spacecraft, three modified "space tug" versions were built to deliver modules to the ISS. These variants lacked a pressurized cargo section and had a heavily modified tanker section. Progress DC-1 delivered '' Pirs'' in 2001, Progress M-MIM2 delivered '' Poisk'' in 2009 and Progress M-UM delivered '' Prichal'' in 2021.

Progress M 11F615A60 (2008–2015)

A new modification of the Progress spacecraft, with new TsVM-101 digital flight computer and MBITS digital telemetry system, was first launched on 26 November 2008, at 12:38 UTC from the Kazakhstan's Baikonur Cosmodrome spaceport aboard a Russian Soyuz rocket. The first spacecraft of this series was Progress M-01M.

The spacecraft belongs to the so-called 400 series (GRAU: 11F615A60), and all modifications applied to it were subsequently used in the production of new Soyuz TMA-01M crewed spacecraft.

Progress M-27M was launched on 28 April 2015, but communication with the vessel was lost soon after, and it was destroyed as it re-entered the atmosphere on 8 May 2015. The last launch was Progress M-29M.

Progress M1 (2000–2004)

Progress M1 is another variant, capable of carrying more propellant (but less total cargo) to the ISS. There have been 11 of these flights.

* Mass:
* Capacity cargo:
* Capacity dry cargo:
* Capacity propellant:

Progress M2

Progress M2 was a planned variant, which was a proposed design for the proposed Mir-2 space station, but was dropped due to financial issues. The M2 variant would have a larger service module for larger cargo or space station modules and would have been launched on a Zenit rocket as the spacecraft is bigger.

Progress MS (2015–present)

Progress MS (Modernized Systems) is an improved variant, largely focused on replacing pieces of outdated analogue equipment, many of which were no longer in production, with new digital systems. Key updates include a new flight control system, the new Kurs-NA rendezvous system, a new communications and telemetry system, additional micro-meteoroid protection, an improved docking mechanism, a digital camera system, and a CubeSat deployment platform. The first Progress MS flight launched on 21 December 2015.

Current status

Progress spacecraft are used to resupply the International Space Station (ISS) as of 2021. Between 1 February 2003 and 26 July 2005, they were the only spacecraft available to transport large quantities of supplies to the station, as the Space Shuttle fleet was grounded after the breakup of '' Columbia'' at the end of STS-107. For ISS missions, the Progress M1 variant is used, which moves the water tanks from the propellant and refueling module to the pressurized section, and as a result is able to carry more propellant. Progress M-UM, the final flight of a Progress-M spacecraft, was launched 24 November 2021 on a Soyuz 2.1b. As of 7/1/2021, there have been 170 Progress flights to the ISS.

On 9 July 2018, Progress MS-09 broke a previous record by reaching the ISS in 3 hours and 48 minutes, carrying about of cargo and supplies. It delivered food, fuel and supplies, including 705 kg of propellant, of oxygen and air, of water.

The European Space Agency (ESA) operated its own type of robotic supply freighter, the Automated Transfer Vehicle (ATV). The first of these, named ''Jules Verne'', was launched at 04:03 UTC on 9 March 2008. ATVs can carry up to 8.85 tonnes of cargo into space, roughly three times as much as the Progress, and were launched annually by Ariane 5 rockets from 2011-2014 as part of ESA contribution to ISS upkeep. The design is adopted as the Service Module of the Orion spacecraft.

NASA's planned Orion spacecraft was initially designed to have an uncrewed variant of the Crew module similar to Progress; however, this capability was removed in 2009. As of 2023, SpaceX's Dragon spacecraft and Northrop Grumman's Cygnus spacecraft handle American logistics to the International Space Station.

File:Progress M-11M spacecraft launches 2 cropped.jpg, Launch of Progress M-11M
File:Unity-Zarya-Zvezda STS-106.jpg, The Progress M1-3 seen docked at the bottom of the ''Zvezda'' module of the ISS during STS-106.

See also

* List of Progress flights
* Uncrewed spaceflights to the International Space Station
* Comparison of space station cargo vehicles
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* Orbital Technologies Commercial Space Station

Notes

References

External links

Russian Progress Spacecraft
– NASA page discussing the Progress spacecraft, updated May 2005

Progress cargo ship
– History, photos and details at RussianSpaceWeb.com

{{Soyuz variants

Cargo spacecraft
Crewed space program of Russia
Crewed space program of the Soviet Union
Supply vehicles for the International Space Station