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.

Read More

So Why Did The Bulbs Fail?

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

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.

Read More