联盟 2.1b 弗雷加特 | Kosmos 2552 (EKS 5/Tundra 5)

描述

Soyuz-2, GRAU index 14A14, is the collective designation for the 21st-century version of the Russian Soyuz rocket. In its basic form, it is a three-stage carrier rocket for placing payloads into low Earth orbit. The first-stage boosters and two core stages feature uprated engines with improved injection systems, compared to the previous versions of the Soyuz. Digital flight control and telemetry systems allow the rocket to be launched from a fixed launch platform, whereas the launch platforms for earlier Soyuz rockets had to be rotated as the rocket could not perform a roll to change its heading in flight. The Soyuz 2.1b represents the latest development stage of the proven rocket. It uses the new RD-0124 engines in the first three stages, coupled with an improved injection system that significantly boosts the performance of the Soyuz. Furthermore, she wears a new, digital startup control system. This will allow the Soyuz 2.1b to carry around 1.2 tonnes more payload into low earth orbit compared to its predecessor.

联盟-2（Soyuz-2，GRAU 索引 14A14）是俄罗斯联盟号火箭 21 世纪版本的统称。其基本型为三级运载火箭，用于将载荷送入近地轨道。与以往的联盟号版本相比，第一级助推器与两个芯级采用了配备改进喷注系统的升级发动机。数字飞行控制与遥测系统使火箭能够从固定发射平台发射，而早期联盟号火箭的发射平台必须旋转，因为火箭在飞行中无法通过滚转改变航向。 联盟 2.1b 代表了这款成熟火箭的最新发展阶段。 它在前三级中使用了新型 RD-0124 发动机，并配以改进的喷注系统，大幅提升了联盟号的性能。 此外，它还采用了全新的数字启动控制系统。 这将使联盟 2.1b 相比其前身多向近地轨道运送约 1.2 吨载荷。