Hello, Ąčęėįšųūž, and welcome to Wikipedia! Thank you for your contributions. I hope you like the place and decide to stay. Unfortunately, one or more of your recent edits to the page LR-87 did not conform to Wikipedia's verifiability policy, and may have been removed. Wikipedia articles should refer only to facts and interpretations verified in reliable, reputable print or online sources or in other reliable media. Always provide a reliable source for quotations and for any material that is likely to be challenged, or it may be removed. Wikipedia also has a related policy against including original research in articles.
In particular, I attempted to find a reference to support the content added in these edits, but an Internet search was unsuccessful – in particular, I could not find any reference to Soyuz 6 other than the Soyuz 6 or Soyuz TMA-2 missions, which launched on standard Soyuz and Soyuz-FG boosters. Were you referring to the RD-107 family of engines used by the boosters, which have four combustion chambers? In the absence of a citation, I have removed the material for now.
If you are stuck and looking for help, please see the guide for citing sources or come to The Teahouse, where experienced Wikipedians can answer any queries you have! Here are a few other good links for newcomers:
I hope you enjoy editing here and being a Wikipedian! Please sign your name on talk pages using four tildes (~~~~); this will automatically produce your name and the date. If you need personal help ask me on my talk page, or . Again, welcome. Anon423 ( talk) 23:36, 21 August 2021 (UTC)