Editing Soyuz (rocket family) (section)

=== First stage ===
[[File:Sojuz TMA-9 into flight.jpg|thumb|The first stage hauling the Soyuz TMA-9 crew up to the ISS, 2006.]]

The first stage of Soyuz rockets consists of four identical conical liquid booster rockets strapped to the second stage core. These boosters are also called '''Blok-B, V, G, and D'''.{{efn|This is a transliteration of the second through fifth letters of the Cyrillic alphabet (Б, В, Г, Д). The English translation is Block B, C, D and E.}} Each engine has four main combustion chambers and two [[vernier thruster]] combustion chambers for attitude control. The engine is pump-fed by a hydrogen peroxide gas generator. Propellant tanks are pressurized using liquid nitrogen vaporization.<ref>{{Cite book |url=http://www.georing.biz/usefull/Soyuz-Users-Manual-March-2012.pdf |title=Soyuz at the Guiana Space Centre User's Manual Issue 2 |date=March 2012 |publisher=Arianespace |page=1-6 |access-date=2024-11-26}}</ref>

Statistics (each of 4 boosters):
* Height: {{convert|19.6|m|ftin|abbr=off}}
* Diameter: {{convert|2.68|m|ftin|abbr=off}}
* Empty mass: {{convert|3784|kg}}
* Gross mass: {{convert|43400|kg}}
* Propellant mass: {{convert|39160|kg}}
** Oxidizer load ([[liquid oxygen]]): {{convert|27900|kg}}
** Fuel load ([[RP-1]]): {{convert|11260|kg}}
* Powered by: 1 × [[RD-107A]] 
* Maximum thrust:
** At sea level: {{convert|838.5|kN|lk=on}}
** In vacuum: {{convert|1021.3|kN}}
* [[Specific impulse]]:
** At sea level: {{convert|262|isp|lk=on}}
** In vacuum: {{convert|319|isp}}
* Burn time: 118 seconds
* Throttling: two-level
* Stage separation: [[Pyrotechnic fastener]]/springs/[[Reaction control system|reaction nozzle]]