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9月13日,国际发射服务公司宣布推出“质子”号火箭面向较小型静地轨道卫星的两个新型号,即中型“质子”号和轻型“质子”号,两者可分别在2018年和2019年首飞。两个型号均为两级配置,外加与标准的三级“质子”/“和风”M型火箭相同的“和风”M上面级。除取消“质子”/“和风”M的第二级外,两个新型号余下的两级都略有加长。同现有三级型一样,中型“质子”号第一级设6台捆绑助推器,而轻型“质子”号减为4台。中型“质子”号静地转移轨道运载
On 13 September, International Launch Services announced the launch of two new models of the “Proton” rocket aimed at smaller geostationary satellites, namely the medium-sized “proton” and the light “proton”, both May be the first flight in 2018 and 2019 respectively. Both models are configured in two levels, plus the same “wind” M top level as the standard three-level “Proton” / “Breeze” M-type rocket. Except for the second level of “Proton” / “Breeze” M, the remaining two levels of the two new models are slightly longer. As with the existing three-level type, there are 6 bundles of boosters in the first stage of the medium-sized “Proton”, and four units of the light “Proton” in the first stage. Medium “proton ” quietly transferred orbit