SpaceX Booster Recovery www.wsj.com/articles/the-reusable-american-rockets-1451859290?

So Why Did The Falcon 9 Go Boom?

Thunder00t has a video here.

He has a rather snarky take on the anomaly and frankly I think he went a little overboard. He’s right that NASA hasn’t had a ground based failure since the old Atlas days.  So far until this happened SpaceX hadn’t had any fueling issues either.  So I don’t think that SpaceX is as incompetent as Thunderf00t seems to think that they are.

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So Why Did The Bulbs Fail?

Dave Jones got some burned LED light bulbs in his mailbag.

https://www.youtube.com/watch?feature=player_embedded&v=V9tcC7Ks4_c#t=2402

He gives an interesting study of how they failed.  It turns out that it was a thermal issue rather than a component issue.  My question is why anybody would produce stuff that certain to fail.  Now if there were large assembly or component cost issue I could understand it, but the LEDs and resistors are going to cost within 1/10ths of a cent of each other and the bulbs are probably machine assembled.  So the issue has to come down to design.  I suspect that one problem is that it’s so easy to get Altium and make up a simple board like this.  And if you print out the board and light everything up it works just fine, for a while.  The design may have even been fine with the more expensive PCBs used for the prototypes.  Which was the same PCBs the first few batches had.

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