SpaceX will launch the mammoth Starship on Sunday in a launch window that opens at 5 AM PST (7 AM local time) from the company’s Starbase site in southeast Texas. This flight, which will be the fifth in the Starship development program, is coming a little sooner than expected: the Federal Aviation Administration had previously said that it did not anticipate issuing a modified launch license for this test before late November.
The engines are lit there. They’re just not operating at very high pressure, I think they do it to stop too much air getting into the engines.