The Proton rocket, heavy-lift workhorse of the Russian fleet, has finally returned to flight. The mission was a commercial one, sold through International Launch Services (a joint venture of RSC Khrunichev and Lockheed Martin), and carried the Echostar 21 commercial commsat to geosynchronous transfer orbit. The launch was fully successful, which I’m sure was a bit of a relief after the year-long grounding extended by a frustrating series of delays: first it was grounded to study concerns with the Briz-M upper stage, and then it was grounded further when contamination found in the engines revealed a much larger pattern of fraud within the engine manufacturer, Voronezh Mechanical Plant. Fallout from that included the humiliating order to turn Voronezh management over to their rival, NPO Energomash, which has been tasked with cleaning up the organization so that this does not happen again.
It’s good to see the old workhorse back in operation again. There are four more Proton flights scheduled for 2017, as it works to clear out the backlog.