VDU 2 [NASA]
The VDU thruster units were self-contained modules to enhance attitude control of the space station Mir.
The VDU blocks were mounted on the Sofor girder on the Kvant 1 module to faciliate more effective roll control than using the thrusters on Mir's central core block. Using this off-axis thruster block resulted in a 85% saving of fuel. The 700 kg VDU was a 2.2 m oblong box containig the fuel and 11D428A-10 thrusters.
The VDU units were delivered by modified Progress-M freighters, which replaced the wet cargo section by a special section containing the VDU blocks. VDU 1 was delivered by Progress-M 14 in August 1992. When it ran out of fuel, it was discarded and replaced by VDU 2, delivered by Progress-M 38 in March 1998.
|Type / Application:||Thruster module|
|Operator:||RKK → RAKA|
|VDU 1||N/A||15.08.1992||Ba LC-31/6||Soyuz-U2||with Progress-M 14, VBK-Raduga 6|
|VDU 2||N/A||14.03.1998||Ba LC-1/5||Soyuz-U||with Progress-M 38|