Author Topic: LIVE: Falcon 9 Flight 1 Maiden Flight - June 4, 2010  (Read 491072 times)

Offline edkyle99

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Re: LIVE: Falcon 9 Flight 1 Maiden Flight - June 4, 2010
« Reply #1020 on: 06/06/2010 10:12 pm »
Next time I'll use a stopwatch just in case.

That's what I did.  :)  I did it again with a recorded version and came up with the following.

Launch    0m 0s
MECO1  ~2m 45s
MECO2    3m 3s
Staging   3m 9s
S2Start    3m 16s
Roll Start ~5m 0s
SECO 1    ~8m 37s

Plus or minus a second or two!

 - Ed Kyle

Offline ugordan

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Re: LIVE: Falcon 9 Flight 1 Maiden Flight - June 4, 2010
« Reply #1021 on: 06/06/2010 10:41 pm »
I did it again with a recorded version and came up with the following.

How did you arrive at the SECO 1 number? The different feeds are all offset from each other so it's a nightmare to accurately time something. The T+ clock was in sync with LCC audio, but off with everything else. The onboard camera lagged behind the long distance tracker by 2 s. Pad camera by 3 s from T+ clock, etc.

Your measurement shows MECO2 at 3:03 yet when looking at ground footage it came exactly at the 3 min mark - suggesting launch pad video and tracker appear to be synched, also giving 3 mins.

I tried to work out how much past predicted SECO1 was, but couldn't hook onto anything apart from audio calls which is imprecise. The onboard video was gone by that point. Based on audio calls alone I get 8 min and between 39-41 sec of burntime.

Also, I counted two times the roll control nozzle acted and believe the roll didn't really have a start, it just built up. The torque appeared to be constantly present, but the rate just built up slowly and the torque effect was rapidly increasing due to diminishing stage mass.

Ironically, the greatest attitude disturbances during MVac burn came from the roll nozzle vectoring, when it was inactive the pitch/yaw was rock solid. World of a difference from Falcon 1.
« Last Edit: 06/06/2010 10:52 pm by ugordan »

Online butters

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Re: LIVE: Falcon 9 Flight 1 Maiden Flight - June 4, 2010
« Reply #1022 on: 06/06/2010 11:52 pm »
There's no abort mode on unmanned rockets, so no need to disable redlines.  All of the off-nominal conditions that are survivable should be thought of beforehand and designed for in flight software.  There's precious little chance that something is going to develop in flight, a solution thought of, a solution designed, and uploaded all in the amount of possible reaction time.  It's the same reason the Germans and many modern rocketeers do not want to give hand controls to the crew capsule.

My barely educated opinion is that the avionics on a modern manned launch vehicle should listen to only two crew inputs during ascent: the talk button for the radio, and the abort command.  But the displays should provide a thorough spread of data for the crew to monitor and to empower quick and decisive action should the abort command be necessary.

One might make the case for engine shutdown override, but on a vehicle with an abort escape system, I think it's better to let the computer do its thing.  Better to abort because engine-out capability is exceeded rather than risk a more violent engine failure.

The elephant in the room with Shuttle is that nobody really wants to see if RTLS actually works or not.   That colors the decision-making process just a bit.

Offline ugordan

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Re: LIVE: Falcon 9 Flight 1 Maiden Flight - June 4, 2010
« Reply #1023 on: 06/07/2010 10:47 am »
A remote camera video (HD available) of the liftoff now available: http://www.spacex.com/multimedia/videos.php?id=52

Warning: LOUD, thin sound so watch out.

Offline agman25

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Re: LIVE: Falcon 9 Flight 1 Maiden Flight - June 4, 2010
« Reply #1024 on: 06/07/2010 12:03 pm »
Wonder where they had the microphone. Almost damaged my hearing.

Offline ugordan

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Re: LIVE: Falcon 9 Flight 1 Maiden Flight - June 4, 2010
« Reply #1025 on: 06/07/2010 12:54 pm »
Almost damaged my hearing.

If only someone had warned you beforehand...

Offline tigerade

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Re: LIVE: Falcon 9 Flight 1 Maiden Flight - June 4, 2010
« Reply #1026 on: 06/07/2010 01:01 pm »
Almost damaged my hearing.

If only someone had warned you beforehand...

I had a good LOL reading this.  But as for the liftoff video, it's awesome and I never get tired of watching it.  Hopefully they'll keep making videos of all the future F9 and F1e flights.

Offline agman25

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Re: LIVE: Falcon 9 Flight 1 Maiden Flight - June 4, 2010
« Reply #1027 on: 06/07/2010 01:10 pm »
Almost damaged my hearing.

If only someone had warned you beforehand...
You can't trust stuff people have written on the interwebs.
 :)

Offline TrueBlueWitt

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Re: LIVE: Falcon 9 Flight 1 Maiden Flight - June 4, 2010
« Reply #1028 on: 06/07/2010 01:24 pm »
Has anyone heard how the pad/flame trench and surrounding structures fared?

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