PROGRESS RESUPPLY VEHICLE

The Progress-M is an unmanned spacecraft used to deliver supplies and other equipment to Mir. The spacecraft is launched on a Soyuz SL-4 rocket from the Baikonur Cosmodrome in Kazakhstan and usually docks with Mir 2-3 days later. The Progress is unloaded by the crew after it docks with the station, it remains in place, usually at the aft docking port attached to the Kvant module. The Mir crew uses the emty Progress as a trash storage capsule, filling it with garbage accumulated from regular station activities. It is also used to maintain or boost the orbit of the Mir station, saving fuel on the other modules. The trash-filled Progress undocks shortly before the next new Progress arrives, and is deorbited to burn up in the Earth's atmosphere.

The Progress-M gained publicity in June 1997 when one crashed into the Spektr module, depressurizing it and severely damaging one of its solar panels. The Progress may have been overloaded with trash when the Mir crew, controlling it manually, were unable to get it to dock safely after a series of maneuvering and docking tests.

The Progress is similar to the Soyuz spacecraft but the Orbital module have been reconfigured to contain cargo.
The Cargo Module has a lenght of 3.0 m and a diameter of 2.3 m. Its habitable volume lies at 4.00 m3. It can take a payload of 1,340 Kg, and weighs with the payload a total of 2,520 kg.

The Descent module have been reconfigured to contain fuel for refueling Mir.
The Refuelling Module has a length of 2.2 m and a diameter of 2.2 m. It can have a payload of up to 975 Kg and the moulde weighs with the payload 1,846 kg.

The Service module is about the same on the Progress as on the Soyuz.
The Service module has a lenght of 2.3 m and a diameter of 2.2 m. It weighs 2,654 kg with the 500 Kg of fuel. The primary engine has a thrust of 417 kgf which gives 200 m/s of delta v.

Module	Mass (Kg)	Length (m)	Max. Diameter (m)	Pressurized Volume (Cubic Meters)	No. of Solar Arrays/Area (Square Meters)	Power Output (KW)	Function
Progress M	7,200	7	2.7	7.6	2/10	1.3	Unmanned resupply & logistics