Author Topic: SCRUB: SpaceX Falcon 9 v1.1 - SES-8 - Nov. 28 - SECOND LAUNCH ATTEMPT UPDATES (Read 124832 times)

Joffan · « **Reply #120 on:** 11/28/2013 10:28 pm »

Quote from: russianhalo117 on 11/28/2013 10:26 pm

Quote from: Chris Bergin on 11/28/2013 10:24 pm
T-20 mins.

Launch window can be extended by 20 minutes if required - Customer making the call.
does that mean they are willing to take small performance hit. I dont think i understand that statement.

They would either have to use more propellant to achieve target orbit or take longer to get there, so would potentially shorten the operational life of the satellite.

Mader Levap · « **Reply #121 on:** 11/28/2013 10:30 pm »

Quote from: Ford Mustang on 11/28/2013 10:24 pm

Customer willing to extend launch window by 20 minutes if necessary.

Wouldn't it be too short to make any difference? Recycle to -13 takes way longer than 13 min...

Chris Bergin · « **Reply #122 on:** 11/28/2013 10:31 pm »

Polling for terminal count again.

Ford Mustang · « **Reply #123 on:** 11/28/2013 10:31 pm »

T-13 minute polling.

LD is GO, initiate terminal count.

Chris Bergin · « **Reply #124 on:** 11/28/2013 10:31 pm »

Go to proceed.

Jim · « **Reply #125 on:** 11/28/2013 10:32 pm »

It might not be a propellant trade off, it could be sun angles and an electrical power trade off

Chris Bergin · « **Reply #126 on:** 11/28/2013 10:32 pm »

Let's keep the chatter down. Will accept screenshots.

stichtom · « **Reply #127 on:** 11/28/2013 10:33 pm »

Quote from: Joffan on 11/28/2013 10:28 pm

Quote from: russianhalo117 on 11/28/2013 10:26 pm
Quote from: Chris Bergin on 11/28/2013 10:24 pm
T-20 mins.

Launch window can be extended by 20 minutes if required - Customer making the call.
does that mean they are willing to take small performance hit. I dont think i understand that statement.

They would either have to use more propellant to achieve target orbit or take longer to get there, so would potentially shorten the operational life of the satellite.

I know almost nothing about orbits, but shouldn't it be the same thing since its target is a geosynch orbit at a defined longitude? I thought the window was only limited by FAA.

Chris Bergin · « **Reply #128 on:** 11/28/2013 10:34 pm »

T-10 mins. Autosequence starting.

Ford Mustang · « **Reply #129 on:** 11/28/2013 10:34 pm »

T-10 minutes and counting. Terminal count resumed. RCO confirms clock is counting.

Elmar Moelzer · « **Reply #130 on:** 11/28/2013 10:34 pm »

T -10 minutes

Chris Bergin · « **Reply #131 on:** 11/28/2013 10:35 pm »

Merlin 1Ds in chilldown.

Prober · « **Reply #132 on:** 11/28/2013 10:36 pm »

Chris Bergin · « **Reply #133 on:** 11/28/2013 10:36 pm »

T-8 mins.

AJA · « **Reply #134 on:** 11/28/2013 10:36 pm »

N2 ACS closeout started

Elmar Moelzer · « **Reply #135 on:** 11/28/2013 10:36 pm »

T -8 minutes

AJA · « **Reply #136 on:** 11/28/2013 10:38 pm »

1st stage heater auto-sequence ending.
2nd stage heater auto-sequence ending.

1st and 2nd stage internal auto-sequences started (-6:20)

Ground TVC tank pressing

T-6min

Pressing tanks for SB retract

Stage 1 and 2 internal power

Tanks at pressure for SB retract

Ground TVC tank at pressure
(T-5 min)

tigerade · « **Reply #137 on:** 11/28/2013 10:38 pm »

Elon Musk ‏@elonmusk

Increasing helium spin start pressure. Probably <50% chance of passing all aborts, but worth a try. Countdown resuming ...

Chris Bergin · « **Reply #138 on:** 11/28/2013 10:38 pm »

Tanks into press.

Ford Mustang · « **Reply #139 on:** 11/28/2013 10:39 pm »

Strongback retract: