Author Topic: LIVE: Delta IV-M+(5,4) - WGS-8 - December 7, 2016 (23:53 UTC)  (Read 29192 times)

Online ChrisGebhardt

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Current weather:

Temp: 70.1F
Skies: Clear
Wind: NNE @ 3mph
Pressure: 30.04 in
Visibility: 10.0 miles
Heat Index   : 71 F
Dew Point   : 63 F
Humidity: 79%

Online ZachS09

Under one hour to launch. The Command Receiver Decoder now being tested.
"Liftoff of Falcon 9: the world's first reflight of an orbital-class rocket."

Online ZachS09

Current weather:

Temp: 70.1F
Skies: Clear
Wind: NNE @ 3mph
Pressure: 30.04 in
Visibility: 10.0 miles
Heat Index   : 71 F
Dew Point   : 63 F
Humidity: 79%

What's the source of this current weather? I would like to use it for future launch coverages.
"Liftoff of Falcon 9: the world's first reflight of an orbital-class rocket."

Online ZachS09

Correction: We're at T-38 minutes (L-53 minutes.)
« Last Edit: 12/07/2016 10:02 PM by ZachS09 »
"Liftoff of Falcon 9: the world's first reflight of an orbital-class rocket."

Online ZachS09

T-30 minutes. Both the Common Booster Core and the Delta Cryogenic Second Stage have liquid hydrogen as the fuel and liquid oxygen as the oxidizer. Standing 215 feet tall and weighing 881,997 pounds, the Delta IV Medium+ (5,4) (upg.) and its predecessor, the one with the weaker RS-68 engine; have exclusively launched WGS satellites since 2009. At liftoff, the launch vehicle will produce 1,702,974 pounds of thrust, which is about as much as the Falcon 9 rocket.

FTS checks are complete.
"Liftoff of Falcon 9: the world's first reflight of an orbital-class rocket."

Online ChrisGebhardt

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A look at our flight path today, culminating in WGS-8 separation at 41mins 43.6 seconds after liftoff.
« Last Edit: 12/07/2016 10:09 PM by ChrisGebhardt »

Offline Chris Bergin

We've got the test bars people!

Online ZachS09

T-20 minutes.

15 minutes until coverage starts.
"Liftoff of Falcon 9: the world's first reflight of an orbital-class rocket."

Online ZachS09

Another correction: We're at T-5 minutes.
"Liftoff of Falcon 9: the world's first reflight of an orbital-class rocket."

Online ChrisGebhardt

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The 4 strap on GEM 60 boosters from Orbital ATK each produce 185,800 lbf at liftoff, burning HTBP propellant for 91 to 93 seconds for a total cumulative booster thrust at liftoff of 743,200 lbf increasing to 1,124,000 lbf during flight.

At liftoff, the Common Booster Core's RS-68A engine provides 705,250 lbf and burns LH2 and LOX for 245 seconds (4 minutes 5 seconds).

Total thrust at liftoff of the Delta IV M+ (5,4) is 1,448,450 lbf.  During flight, when the SRMs reach maximum thrust, the total combined thrust of the vehicle reaches 1,829,250 lbf.

The second stage, the Delta Cryogenic Second Stage (DCSS), burns LH2 and LOX via a single RL10-B-2 engine that delivers 24,750 lbf.
« Last Edit: 12/07/2016 10:19 PM by ChrisGebhardt »

Online ZachS09

T-4 minutes and holding. This is a planned 30-minute hold.

I thought the hold was 15 minutes long.
"Liftoff of Falcon 9: the world's first reflight of an orbital-class rocket."

Online ChrisGebhardt

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Today's main flight events are:

« Last Edit: 12/07/2016 10:23 PM by ChrisGebhardt »

Online ZachS09

9 minutes left until the live coverage.
"Liftoff of Falcon 9: the world's first reflight of an orbital-class rocket."

Offline Steven Pietrobon

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10 minutes to start of broadcast.
Akin's Laws of Spacecraft Design #1:  Engineering is done with numbers.  Analysis without numbers is only an opinion.

Online ZachS09

5 minutes to go.
"Liftoff of Falcon 9: the world's first reflight of an orbital-class rocket."

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First burn of the DCSS tonight will last 936.8 seconds, or 15 minutes 36.8 seconds

This will be followed by a coast phase of 9 minutes 34.8 seconds.

The DCSS engine will the ignite again for a 3 minute 7 second burn.

After that, WGS-8 separation will occur 9 minutes 10seconds later.

Offline Steven Pietrobon

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Two minutes to start of broadcast.
Akin's Laws of Spacecraft Design #1:  Engineering is done with numbers.  Analysis without numbers is only an opinion.

Online ChrisGebhardt

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Tonight will be the 6th flight of the Delta IV M+ (5,4) variant.  This configuration made its first flight on 5 December 2016, so happy belated birthday to Delta IV M+ (5,4).

Offline Steven Pietrobon

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

Online ZachS09

From Cape Canaveral Air Force Station, United Launch Alliance presents live coverage of the launch of WGS-8 atop a Delta IV Medium+ (5,4) (upg.) rocket.

Tonight's PAO is Mike Underhill, who commentated the GPS IIF-11 mission in October 2015.
« Last Edit: 12/08/2016 09:15 AM by ZachS09 »
"Liftoff of Falcon 9: the world's first reflight of an orbital-class rocket."

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