What’s the difference between ball bearings and hydrostatic bearings? You should have more of an inkling after checking out Amazon billionaire Jeff Bezos’ latest update on the development of Blue Origin’s BE-4 rocket engine. The engine is undergoing testing for use not only on the New Glenn rocket that Bezos’ space venture is planning, but also on United Launch Alliance’s next-generation Vulcan rocket. The BE-4 is designed to provide 550,000 pounds of thrust, propelled by liquid oxygen and liquefied natural gas. Bezos says that kind of thrust should be enough to send a payload on the first leg of a trip… Read More read more Disclaimer: Chances are that this post was requested by an advertiser.