Blue Origin’s BE-4 rocket engine completes first hot-fire test

Blue Origin was a bit of a mystery to the public for quite awhile. After all, unlike competitor SpaceX, the company haven't always been welcoming to the scrutiny that comes with inviting the media in. But that changed in early 2016, when reporters we…
Source: Engadget | Blue Origin’s BE-4 rocket engine completes first hot-fire test