NASA Stennis in 2013. By late 2013, the BE-3 had been successfully tested on a full-duration suborbital burn, with simulated coast phases and engine relights, "demonstrating deep throttle, full power, long-duration and reliable restart all in a single-test sequence." NASA has released a video of the test. , the engine had demonstrated more than 160 starts and of operation at Blue Origin's test facility near Van Horn, Texas. BE-3 engine acceptance testing was completed by April 2015 with 450 test firings of the engine and a cumulative run time of more than . The BE-3 engine powers the New Shepard space capsule that is being used for Blue Origin suborbital flights that began in 2015. BE-3U The BE-3U engine is a modified BE-3 for use on upper stages of Blue Origin orbital launch vehicles. The engine will include a nozzle better optimized for operation under vacuum conditions as well as a number of other manufacturing differences since it is an expendable engine whereas the BE-3 is designed for reusability. BE-4 Blue Origin began work on a new and much larger rocket engine in 2011. The new engine, the Blue Engine 4, or BE-4 that will combust liquid oxygen and liquid methane propellants. The engine has been designed to produce of thrust. In late 2014, Blue Origin signed an agreement with United Launch Alliance (ULA) to co-develop the BE-4 engine, and to commit to use the new engine on an upgraded Atlas V launch vehicle, replacing the single RD-180 Russian-made engine. The new launch vehicle will use two of the BE-4 engines on each first stage. The engine development program began in 2011. On October 31st, 2022, a Twitter post by the official Blue Origin account announced that the first two BE-4 engines had been delivered to ULA and were in the process of being integrated on a Vulcan rocket. In a later tweet, ULA CEO Tory Bruno said that one of the engines had already been installed on the booster, and that the other would be joining it momentarily. BE-7 The BE-7 engine, currently under development, is being designed for use on a lunar lander. Its first ignition tests were performed June 2019. The BE-7 is designed to produce 40 kN (10,000 lbf) of thrust and have a deep throttle range, making it less powerful than the other engines Blue Origin has in development/production, but this low thrust is advantageous