Tag: engineering

The countdown has begun

9:37 pm

Tonight’s Falcon 9 launch: The countdown has begun, and the weather conditions have improved.

SpaceX will begin its own webcast at 3 am (Eastern), which is midnight here in Arizona.

An aside: The ashes of actor James Doohan, who played Scotty on the 1960s television show Star Trek, will be among 308 other cremated remains launched into space by Falcon 9 tonight. As one commenter for the above article noted quite appropriately,

You haven’t really covered any of the important questions here.

i.e. Are there enough dilithium crystals in the engine room to get Scotty up there? And are they using photon torpedoes to blast him out into space? And when they launch, will someone say, “Take her out, Mr. Sulu. Warp factor one.”?

Godspeed, Scotty old bean.

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Bridge Day rappel

6:01 pm

An evening pause: Bridge Day 2011: An 800+ foot rappel from the New River Gorge Bridge in West Virginia. The event is held each fall, when they close the bridge to vehicles so pedestrians, base jumpers, and rappellers can enjoy it. I’ve done this rappel four times, twice as part of the safety team.

On the clip below, the rappel itself begins at 3:40. As this was this guy’s first rappel on the bridge, he takes it very slow, which is okay as it gives him time to enjoy the view.

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SpaceX has reported that they have found the cause of the Falcon 9 launch abort this morning.

4:46 pm

In an email update, SpaceX reports that they have found the cause of the Falcon 9 launch abort this morning.

During rigorous inspections of the engine, SpaceX engineers discovered a faulty check valve on the Merlin engine. We are now in the process of replacing the failed valve. Those repairs should be complete tonight. We will continue to review data on Sunday. If things look good, we will be ready to attempt to launch on Tuesday, May 22nd at 3:44 AM Eastern.

If this is true, than this entire exercise is an unqualified success and illustrates a certain robustness to SpaceX’s engineering on Falcon 9. Their control computer during the launch process spotted the problem before it caused a complete loss of the vehicle and payload. They can now locate the problem, fix it, and proceed with launch.

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Falcon 9 aborted its launch tonight at 4:55 am (Eastern) at T minus zero seconds.

2:03 am

No go: Falcon 9 aborted its launch tonight at 4:55 am (Eastern) at T minus zero seconds.

Just after ignition there was a shutdown. They were able to make the vehicle safe, and are trying to figure out what happened. It appears there was a high pressure reading in one engine.

The next opportunity to launch is three days hence, though whether they will go for it then depends on whether they can figure out what caused the shutdown.

Update: More details here.

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Senator Bill Nelson (D-Florida) on Monday attacked the House version of NASA’s budget that required the agency to make a quick decision on its commercial manned launch company.

5:37 pm

Senator Bill Nelson (D-Florida) on Monday attacked the House version of NASA’s budget that required the agency to make a quick decision on its commercial manned launch company.

Nelson faces a difficult election campaign from the right. Thus, I suspect he has realized that he is better off promoting free enterprise than local pork. It is unfortunate that the Republicans in the House haven’t yet realized this.

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