In the Blue Origin YouTube video Replay of New Shepard Mission 8 Livestream, "command engine start" is heard at
T- 00:03, an audible "pop" can be heard at about
T- 00:00.5 immediately followed by visible flames.
However, the apparent size of the hot exhaust and character of the sound continue to ramp until about
T+ 00:06 and there is no vertical motion of the rocket until fully
Is there an almost 7 second "warm up" or ramping of New Shepard's BE-3 engine? Is this necessary function, or perhaps part of an exhaustive test (no pun intended) as this is a commercial space-tourism launch vehicle?
Video queued at