Author Topic: LIVE: IRNSS-1I - PSLV-XL (C41) - April 11, 2018 (22:34 UTC)  (Read 35173 times)

Offline 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

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Re: LIVE: IRNSS-1I - PSLV-XL (C41) - April 11, 2018 (22:34 UTC)
« Reply #101 on: 04/11/2018 10:34 pm »
T-30 seconds. Go PSLV, Go IRNSS.

Igniters being armed.
Liftoff for St. Jude's! Go Dragon, Go Falcon, Godspeed Inspiration4!

Online ZachS09

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Re: LIVE: IRNSS-1I - PSLV-XL (C41) - April 11, 2018 (22:34 UTC)
« Reply #102 on: 04/11/2018 10:34 pm »
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 for St. Jude's! Go Dragon, Go Falcon, Godspeed Inspiration4!

Offline 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

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Re: LIVE: IRNSS-1I - PSLV-XL (C41) - April 11, 2018 (22:34 UTC)
« Reply #104 on: 04/11/2018 10:35 pm »
T+25 seconds. We've ignited the air-starts on time. Vehicle beginning to go supersonic.
Liftoff for St. Jude's! Go Dragon, Go Falcon, Godspeed Inspiration4!

Online ZachS09

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Re: LIVE: IRNSS-1I - PSLV-XL (C41) - April 11, 2018 (22:34 UTC)
« Reply #105 on: 04/11/2018 10:35 pm »
T+40 seconds. We're now reaching the period of maximum dynamic pressure as all four ground-starts begin to tail off.
Liftoff for St. Jude's! Go Dragon, Go Falcon, Godspeed Inspiration4!

Offline Chris Bergin

LAUNCH!
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Online ZachS09

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Re: LIVE: IRNSS-1I - PSLV-XL (C41) - April 11, 2018 (22:34 UTC)
« Reply #107 on: 04/11/2018 10:35 pm »
T+1 minute, 10 seconds. We have good separation of all four ground-start motors and the air-starts are now burning out.
Liftoff for St. Jude's! Go Dragon, Go Falcon, Godspeed Inspiration4!

Offline 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

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Re: LIVE: IRNSS-1I - PSLV-XL (C41) - April 11, 2018 (22:34 UTC)
« Reply #109 on: 04/11/2018 10:36 pm »
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 107-second point, followed by staging and second stage engine start one second later.
« Last Edit: 05/04/2018 03:32 am by ZachS09 »
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Online ZachS09

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Re: LIVE: IRNSS-1I - PSLV-XL (C41) - April 11, 2018 (22:34 UTC)
« Reply #110 on: 04/11/2018 10:36 pm »
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 »
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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.

Offline 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

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Re: LIVE: IRNSS-1I - PSLV-XL (C41) - April 11, 2018 (22:34 UTC)
« Reply #113 on: 04/11/2018 10:37 pm »
Now two and a half minutes into the flight of IRNSS 1I. Vehicle attitude is nominal; second stage propulsion is looking good.
Liftoff for St. Jude's! Go Dragon, Go Falcon, Godspeed Inspiration4!

Offline Chris Bergin

Interesting solids sep
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Online ZachS09

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Re: LIVE: IRNSS-1I - PSLV-XL (C41) - April 11, 2018 (22:34 UTC)
« Reply #115 on: 04/11/2018 10:37 pm »
Three minutes in. Heat shield jettison in about twenty seconds.
Liftoff for St. Jude's! Go Dragon, Go Falcon, Godspeed Inspiration4!

Offline 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

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Re: LIVE: IRNSS-1I - PSLV-XL (C41) - April 11, 2018 (22:34 UTC)
« Reply #117 on: 04/11/2018 10:38 pm »
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 for St. Jude's! Go Dragon, Go Falcon, Godspeed Inspiration4!

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

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Re: LIVE: IRNSS-1I - PSLV-XL (C41) - April 11, 2018 (22:34 UTC)
« Reply #119 on: 04/11/2018 10:38 pm »
Coming up on SECO momentarily.
Liftoff for St. Jude's! Go Dragon, Go Falcon, Godspeed Inspiration4!

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