It looks like Blue Origin has just completed their first BE-4 engine. It is similar, but different from SpaceX's Raptor methalox engine. The BE-4 is a ORSC= oxygen rich staged combustion. LOX sent into a preburner then to the combustion chamber so ox rich gas, LOX and LCH4 burned together. The Raptor is a FFSC= full flow staged combustion. Both LOX and LCH4 sent to preburners before the combustion chamber which leads to higher chamber pressure and isp. The BE-4 is slated to possibly replace the Russian RD-180 used in the Atlas V. The new ULA rocket is called the Vulcan and would use two BE-4s or possibly a couple Aerojet AR-1 engines. The BE-4 remains the primary possibility based on the results of a full scale engine test. Until now there was no full scale engine. So we'll likely see a test of this engine soon and an announcement that ULA will use it soon. Twitter Jeff Bezos (@JeffBezos) | Twitter For an image of a test firing of an early smaller test engine. Similar to the images we've seen of the Raptor test firings.