Author Topic: LIVE: IRNSS-1I - PSLV-XL (C41) - April 11, 2018 (22:34 UTC)  (Read 16547 times)

Online Steven Pietrobon

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Re: LIVE: IRNSS-1I - PSLV-XL (C41) - April 11, 2018 (22:34 UTC)
« Reply #100 on: 04/11/2018 10:34 PM »
T-1 minute.
Akin's Laws of Spacecraft Design #1:  Engineering is done with numbers.  Analysis without numbers is only an opinion.

Online ZachS09

T-30 seconds. Go PSLV, Go IRNSS.

Igniters being armed.
"Liftoff of Falcon 9: the world's first reflight of an orbital-class rocket."

Online ZachS09

T-15.

10, 9, 8, 7, 6, 5, 4, 3, 2, 1, ignition and liftoff of the PSLV-XL rocket with IRNSS 1I, continuing to provide positioning, navigation, and timing services for Indian residents.
"Liftoff of Falcon 9: the world's first reflight of an orbital-class rocket."

Online Steven Pietrobon

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Re: LIVE: IRNSS-1I - PSLV-XL (C41) - April 11, 2018 (22:34 UTC)
« Reply #103 on: 04/11/2018 10:35 PM »
Liftoff!
Akin's Laws of Spacecraft Design #1:  Engineering is done with numbers.  Analysis without numbers is only an opinion.

Online ZachS09

T+25 seconds. We've ignited the air-starts on time. Vehicle beginning to go supersonic.
"Liftoff of Falcon 9: the world's first reflight of an orbital-class rocket."

Online ZachS09

T+40 seconds. We're now reaching the period of maximum dynamic pressure as all four ground-starts begin to tail off.
"Liftoff of Falcon 9: the world's first reflight of an orbital-class rocket."

Offline Chris Bergin

LAUNCH!

Online ZachS09

T+1 minute, 10 seconds. We have good separation of all four ground-start motors and the air-starts are now burning out.
"Liftoff of Falcon 9: the world's first reflight of an orbital-class rocket."

Online Steven Pietrobon

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Re: LIVE: IRNSS-1I - PSLV-XL (C41) - April 11, 2018 (22:34 UTC)
« Reply #108 on: 04/11/2018 10:36 PM »
T+1 minute.
Akin's Laws of Spacecraft Design #1:  Engineering is done with numbers.  Analysis without numbers is only an opinion.

Online ZachS09

T+90 seconds. And there's jettison of both air-start motors. First stage continues to burn well.

First stage burnout should occur at the 109-second point, followed by staging and second stage engine start one second later.
"Liftoff of Falcon 9: the world's first reflight of an orbital-class rocket."

Online ZachS09

T+1 minute, 50 seconds. The first stage has burnt out and separated. The Vikas 2B engine has ramped up to full thrust.

Second stage will burn for about 154 seconds until the 264-second point.
« Last Edit: 04/11/2018 11:19 PM by ZachS09 »
"Liftoff of Falcon 9: the world's first reflight of an orbital-class rocket."

Offline worldtimedate

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Re: LIVE: IRNSS-1I - PSLV-XL (C41) - April 11, 2018 (22:34 UTC)
« Reply #111 on: 04/11/2018 10:36 PM »
Lift-off is normal.
First Stage performance is normal.

Online Steven Pietrobon

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Re: LIVE: IRNSS-1I - PSLV-XL (C41) - April 11, 2018 (22:34 UTC)
« Reply #112 on: 04/11/2018 10:37 PM »
T+2 minutes. First stage separation and second stage ignition.
Akin's Laws of Spacecraft Design #1:  Engineering is done with numbers.  Analysis without numbers is only an opinion.

Online ZachS09

Now two and a half minutes into the flight of IRNSS 1I. Vehicle attitude is nominal; second stage propulsion is looking good.
"Liftoff of Falcon 9: the world's first reflight of an orbital-class rocket."

Offline Chris Bergin

Interesting solids sep

Online ZachS09

Three minutes in. Heat shield jettison in about twenty seconds.
"Liftoff of Falcon 9: the world's first reflight of an orbital-class rocket."

Online Steven Pietrobon

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Re: LIVE: IRNSS-1I - PSLV-XL (C41) - April 11, 2018 (22:34 UTC)
« Reply #116 on: 04/11/2018 10:37 PM »
T+3 minutes.
Akin's Laws of Spacecraft Design #1:  Engineering is done with numbers.  Analysis without numbers is only an opinion.

Online ZachS09

And we have heat shield jettison. With that event occurring successfully, the PSLV now weighs just 11% of its liftoff weight (34.22 tons compared to 310 tons).
"Liftoff of Falcon 9: the world's first reflight of an orbital-class rocket."

Offline worldtimedate

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Re: LIVE: IRNSS-1I - PSLV-XL (C41) - April 11, 2018 (22:34 UTC)
« Reply #118 on: 04/11/2018 10:38 PM »
First Stage has been separated.

Second stage has ignited.

Online ZachS09

Coming up on SECO momentarily.
"Liftoff of Falcon 9: the world's first reflight of an orbital-class rocket."

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