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Thanks for your answer. I read the information on "spaceflightnow.com" They mention the escape velocity of 22,500 mph or 10.06 m/s. I don't know where they get that information. Also in the same article they said that the RD-180 first engine is russian made? I couldn't find any reference on...

Hi, I'm new to this forum. I have a question on escape velocity. I watched the launch and it was spectacular. The commentator mentioned that the vehicle had reached escape velocity of 10.6 km/s. Thats equivalent to 23,712 m/h. I thought that the escape velocity of earth is 11.2 km/s or...