Blue Origin subjected rocket engine to over 100 rounds of testing
 

Blue Origin joined forces with Boeing's/Lockheed Martin's United Launch Alliance to build its BE-4 rocket engine last year. Now, the American-made component has completed over 100 staged-combustion cycles, which "included a representative BE-4 preb...

http://www.engadget.com/2015/10/02/b...t-engine-test/