Author Topic: LIVE: IRNSS-1I - PSLV-XL (C41) - April 11, 2018 (22:34 UTC) (Read 24201 times)

Steven Pietrobon · « **Reply #100 on:** 04/11/2018 10:34 pm »

T-1 minute.

ZachS09 · « **Reply #101 on:** 04/11/2018 10:34 pm »

T-30 seconds. Go PSLV, Go IRNSS.

Igniters being armed.

ZachS09 · « **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.

Steven Pietrobon · « **Reply #103 on:** 04/11/2018 10:35 pm »

Liftoff!

ZachS09 · « **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.

ZachS09 · « **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.

Chris Bergin · « **Reply #106 on:** 04/11/2018 10:35 pm »

LAUNCH!

ZachS09 · « **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.

Steven Pietrobon · « **Reply #108 on:** 04/11/2018 10:36 pm »

T+1 minute.

ZachS09 · « **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.

ZachS09 · « **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.

worldtimedate · « **Reply #111 on:** 04/11/2018 10:36 pm »

Lift-off is normal.
First Stage performance is normal.

Steven Pietrobon · « **Reply #112 on:** 04/11/2018 10:37 pm »

T+2 minutes. First stage separation and second stage ignition.

ZachS09 · « **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.

Chris Bergin · « **Reply #114 on:** 04/11/2018 10:37 pm »

Interesting solids sep

ZachS09 · « **Reply #115 on:** 04/11/2018 10:37 pm »

Three minutes in. Heat shield jettison in about twenty seconds.

Steven Pietrobon · « **Reply #116 on:** 04/11/2018 10:37 pm »

T+3 minutes.

ZachS09 · « **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).

worldtimedate · « **Reply #118 on:** 04/11/2018 10:38 pm »

First Stage has been separated.

Second stage has ignited.

ZachS09 · « **Reply #119 on:** 04/11/2018 10:38 pm »

Coming up on SECO momentarily.