https://www.theregister.co.uk/2017/10/23/jeff_bezos_fires_off_a_blue_dart_singes_elon_musk_and_spacex/

Amazon supremo Jeff Bezos' rocket company Blue Origin has successfully tested its main engine for the first time.

The BE-4 engine is, as the name suggests, Blue Origin's fourth generation rocket. B-1 was a wee thing that boasted 2,200 pounds of thrust. B-2 hit 31,000 pounds and B-3 reached 110,000.