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Old 11-December-2004, 07:56 PM
Madcat Madcat is offline
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Default Delta IV Heavy

Isn't it supposed to launch today? You'd think NASA would be covering this heavily on their website, but I can't find anything.
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Old 11-December-2004, 08:41 PM
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Scrubbed until tomorrow
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Old 12-December-2004, 12:25 AM
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I was down there a few weeks ago and saw it on the pad...impressive looking rocket. I will be checking for streaming video to see if it goes!

Rob
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Old 12-December-2004, 12:34 AM
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Okay, you can always check out the Cape Canaveral Air Force Station home page.

CCAFS Home Page

This launch is not listed on the NASA KSC elv page. Wonder why. They have future launches listed that use the Delta IV.

Rob
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Old 12-December-2004, 09:53 AM
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AFAIK, that's an Air Force launch, so it is not related to NASA. The original plan was, to make some commercial first launch. But when no customer was found, the Air Force bought the first flight. They want to launch some pretty big and very expensive stuff with the heavy they don't want to loose due some nasty maiden flight glich. See Ariane V's maiden flight...

Harald
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Old 12-December-2004, 03:49 PM
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Scrubbed again[/url]
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Old 21-December-2004, 09:17 PM
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Default Re: Delta IV Heavy

We're about 15 minutes away from launch.

A live webcast can be found here.
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Old 21-December-2004, 10:10 PM
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Success!
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Old 21-December-2004, 10:35 PM
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Default Re: Delta IV Heavy

What a majestic liftoff! It really took its time to get going. Must be a close mass/thrust ratio.

Well, at least tlbs101 should be breathing easier now...if he's resumed breathing, that is.

About 4.5 hours to final geo orbit insertion.
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Old 22-December-2004, 09:22 AM
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Default Re: Delta IV Heavy

Delta 4-Heavy hits snag on test flight

From Spaceflight Now:

Quote:
The test launch of Boeing's Delta 4-Heavy rocket began with a breath-taking blastoff from Cape Canaveral Tuesday afternoon but lower-than-expected performance during the initial minutes of flight ultimately caused the mission to fall short of its intended orbit. Nonetheless, Boeing officials called the demonstration flight a success.
The entire flight summary may be found here.
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Old 22-December-2004, 11:54 AM
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Default Re: Delta IV Heavy

Quote:
Originally Posted by Maksutov
I watched it on webcast and out my window at the same time. This is the first launch i've seen clearly from Tampa (haven't lived here that long). Now if they would just get the shuttle fleet back up and running...
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Old 22-December-2004, 12:17 PM
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Nice launch.

What struck me was that if you'd see the liftoff footage in a movie, you'd probably say "what a bad effect". The slowly ascending rocket with that special flame behind it, it looked almost like a celluloid effect

It made a beautiful launch though. And I love the rude looks of the rocket.
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Old 22-December-2004, 08:18 PM
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How come the flame from the center engine appears dimmer and shorter than the outboard ones? Is it being run at lower power, so the core can keep thrusting after the boosters are jettisoned, or is this an optical illusion?
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Old 22-December-2004, 08:33 PM
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Quote:
Originally Posted by Trebuchet
How come the flame from the center engine appears dimmer and shorter than the outboard ones? Is it being run at lower power, so the core can keep thrusting after the boosters are jettisoned, or is this an optical illusion?
I noticed that, too - it is because the center engine was throttled back, probably a combination of not wanting to accelerate too fast when still in the denser parts of the atmosphere and of allowing the center engine to keep burning after the side boosters are done.

Boost sequence timeline is here, documenting the throttle-down and throttle-up.
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Old 22-December-2004, 09:11 PM
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Quote:
Originally Posted by Maksutov
What a majestic liftoff! It really took its time to get going. Must be a close mass/thrust ratio.

Well, at least tlbs101 should be breathing easier now...if he's resumed breathing, that is.

About 4.5 hours to final geo orbit insertion.
I was in the lab working on my current project, when the general manager announced it over the company intercom. I am still too busy to go and celebrate -- maybe this Friday.

8)
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Old 23-December-2004, 12:22 AM
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Unfortunately it did not achieve the planned orbit. Had it been a real sattelite, the mission might have been a failure or at least shortened the operational lifetime due to excessive fuel consumption to reach geosynchronous orbit.
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