From the first Soyuz to the launch vehicles used today, how many launches have been deemed successful?
8
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1$\begingroup$ Successful just on the launch or successful mission? $\endgroup$ – called2voyage♦ Sep 24 '13 at 16:44
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2$\begingroup$ I suggest Jonathan's Space Report - Master Orbital Launch Log as a source to collate this data from. "Soyuz" is however a rather broad term, even if we only count the launch vehicles themselves, with the Soyuz rocket family counting 4 different and still operational vehicles, 5 already retired members, and one under development. So I suggest running a few different subtotals on the mentioned launch log data for the answer. $\endgroup$ – TildalWave Sep 24 '13 at 17:05
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As of Sep 24 2013:
The TsSKB Progress site gives the official numbers for all of the R-7 family.
Now, counting only rockets designated Soyuz, that is:
Soyuz-ST, Soyuz-2, Soyuz-U, Soyuz-FG, Soyuz-U2, Soyuz-M, Soyuz-L, Soyuz.
And not counting Vostok, Molnia, Voskhod, Sputnik and R7 MBR, we have
total: 5+23+778+44+70+8+3+32 = 963
failure: 1+21+2 = 24
success: 963 - 24 = 939
