Author Topic: LIVE: Delta IV-M+(5,2) - NROL-47 - Vandenberg - January 12, 2018  (Read 58303 times)

Offline ZachS09

T-1 minute and counting. Everything still proceeding smoothly with this afternoon's countdown.

The hydrogen burn igniters under the RS-68A engine will be fired at T-15 seconds to reduce any residual hydrogen gas prior to main engine start.
"Liftoff of Falcon 9: the world's first reflight of an orbital-class rocket."

Offline Steven Pietrobon

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T-1 minute. Range is green.
Akin's Laws of Spacecraft Design #1:  Engineering is done with numbers.  Analysis without numbers is only an opinion.

Offline ZachS09

T-30 seconds. Go Delta. Go L-47.

Second stage tanks pressurized for flight.
"Liftoff of Falcon 9: the world's first reflight of an orbital-class rocket."

Offline ZachS09

T-15. SRB igniters armed.

T-10 seconds. 8, 7, 6, we have main engine start, 4, 3, 2, 1, ignition and liftoff! The Delta IV begins another national security mission as it clears the tower.
"Liftoff of Falcon 9: the world's first reflight of an orbital-class rocket."

Offline RocketLover0119

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LIFTOFF of the Delta IV medium carrying the secretive NROL 47! rocket has cleared the tower!
"The Falcon has landed"

Offline ZachS09

Pitch and yaw programs have started according to plan.

You're hearing Patrick Moore provide launch vehicle ascent data from Vandenberg's telemetry lab.
"Liftoff of Falcon 9: the world's first reflight of an orbital-class rocket."

Offline Steven Pietrobon

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Liftoff!
Akin's Laws of Spacecraft Design #1:  Engineering is done with numbers.  Analysis without numbers is only an opinion.

Offline ZachS09

T+35 seconds. Delta IV flying down the center of the track. Good thrust on the main engine and twin GEM-60 boosters.
"Liftoff of Falcon 9: the world's first reflight of an orbital-class rocket."

Offline ZachS09

T+50 seconds. Mach 1.

The vehicle will go through Max-Q in five seconds.
"Liftoff of Falcon 9: the world's first reflight of an orbital-class rocket."

Offline Chris Bergin

LAUNCH!

Offline ZachS09

Over a minute into the flight now.

The GEM-60 boosters should burn out at T+90.8 seconds.
"Liftoff of Falcon 9: the world's first reflight of an orbital-class rocket."

Offline RocketLover0119

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now at Mach one and Max Q!
"The Falcon has landed"

Offline Steven Pietrobon

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T+1 minute.
Akin's Laws of Spacecraft Design #1:  Engineering is done with numbers.  Analysis without numbers is only an opinion.

Offline ZachS09

SRBs have burnt out. Standing by for jettison momentarily.

And there's separation of both boosters. That occurred at the T+1 minute, 40 second mark.
"Liftoff of Falcon 9: the world's first reflight of an orbital-class rocket."

Offline RocketLover0119

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SRB sep!
"The Falcon has landed"

Offline ZachS09

T+2 minutes. Delta IV now being powered solely by the RS-68A engine, which is burning propellant at the rate of about 936 kilograms per second.
"Liftoff of Falcon 9: the world's first reflight of an orbital-class rocket."

Offline Chris Bergin

Booster sep.

Offline Steven Pietrobon

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T+2 minutes. Booster separation.
Akin's Laws of Spacecraft Design #1:  Engineering is done with numbers.  Analysis without numbers is only an opinion.

Offline ZachS09

T+3 minutes. Altitude 113 kilometers, speed 2,414 meters per second, downrange distance 101 kilometers.

Both fairing halves have been jettisoned, exposing the NROL-47 payload to the vacuum of space. The webcast in the process of closing even though we're still in the first stage powered portion.
"Liftoff of Falcon 9: the world's first reflight of an orbital-class rocket."

Offline RocketLover0119

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Fairing jettison has been confirmed
"The Falcon has landed"

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