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===Other abort procedures===
In early Soyuz models there were two abort modes in the time ranging from the ejection of the launch escape system until orbit. One called for separation of only the upper two modules and a controlled descent and could be initiated before about T+522s, the other separated all three and underwent a ballistic descent after T+522.<ref name = 'hall & shayler'>{{cite book|last1=Hall|first1=Rex|last2=Shayler|first2=David J.|title=Soyuz: A Universal Spacecraft|date=2003|publisher=Praxis Publishing Ltd.|location=Chichester, UK|isbn=1-85233-657-9|page=70|url=https://books.google.com/books?id=dbGchpi1HP8C&pg=PA67
Unlike the [[space shuttle abort modes|space shuttle]], Soyuz cannot abort-to-orbit because its third stage has only a single engine and does not carry the reserve fuel necessary to achieve orbit with reduced thrust at a lower stage.<ref name = 'hall & shayler'/>
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