Tested spacecraft systems and designs, manoeuvring of space craft with respect to each other in orbit, conducted scientific, technical and medico-biological experiments in group flight. Carried Vulkan welding furnace for vacuum welding experiments in depressurized orbital module. Was to have taken spectacular motion pictures of Soyuz 7 - Soyuz 8 docking but failure of rendezvous electronics in all three craft due to new helium pressurization integrity test prior to mission did not permit successful rendezvous and dockings. Recovered October 16, 1969 9:52 GMT.
169km X 224km orbit to 192km X 232km orbit. Delta V: 8 m/s
192km X 232km orbit to 201km X 230km orbit. Delta V: 2 m/s
201km X 230km orbit to 203km X 212km orbit. Delta V: 5 m/s
203km X 212km orbit to 215km X 242km orbit. Delta V: 11 m/s
Total Delta V: 26 m/s. References: 1 , 2 , 6 , 32 , 33 , 60 .