NASA launch commentator: Ten, nine, eight,
seven, six, five, four, three, two, one, zero,
ignition, liftoff.
Flight commentator: Vehicle is pitching downrange.
Stage one throttle bucket.
Power and telemetry normal.
Commentator: For those of you
just joining us, you are watching a live view
of the Falcon 9 rocket as it ascends through
the atmosphere, carrying the SpaceX Dragon
capsule to orbit.
The vehicle just passed through Max Q, which
is the point of maximum aerodynamic pressure
on the vehicle.
As you can hear in the background, the excitement
at SpaceX headquarters is unbelievable here.
Flight commentator: Stage one throttle is
passing through Max Q.
You heard that callout for Max Q on
the nets.
The Falcon 9 actually throttles down its nine
Merlin engines to reduce aerodynamic loads
on the vehicle.
It is now throttling those engines back up.
Coming up at T-plus two minutes and 35 seconds
is going to be three events in quick succession.
The first one is going to be the main engine
cutoff, or MECO.
That’s when the nine Merlin one v engines
that you can see on your screen right now
will cut off shortly before a stage separation
at two minutes and 38 seconds.
Shortly after that, the Merlin vacuum engine
on the bottom of the second stage of the Falcon
9 will ignite and will be called second engine
start, or SES.
That will be at two minutes and forty six
seconds.
