If NASA wants to send humans to the Moon or Mars, it should not spend billions on random cost-plus infrastructure projects that supposedly might come in handy if some day there were a program to go. Instead it should just take competitive bids for delivery services. It should incentivize the development of additional systems, including rovers, habitats, life support, power units, space suits and so on, the same way.
It’s pretty clear that, whatever individuals might desire, institutionally, neither NASA or Congress care whether or not they send humans to the moon or Mars, and haven’t since 1972. I do think, though, that despite Bob’s skepticism, the entrepreneurs will get us there.
This is good news. Hans Koenigsmann just did a press conference with Kathy Lueders in which they announced the root cause of the explosion. Apparently it was a failed check valve prior to the test as they were pressurizing, that resulted in some NTO setting fire to titanium piping, causing an overpressure which then cascaded to mixing of the hypergolics. At least that’s my preliminary understanding. They’re going to go from check valves to burst disks, and the fix doesn’t seem to be on the critical path to getting to a November flight.
So, the Dragon 2 explosion happened because a leaking check valve allowed some oxidizer to flow into the pressurization system. The fuel plumbing is probably stainless steel, the helium plumbing is titanium. When oxidizer was pressurized against this titanium it burned.
I almost hit a guy in my neighborhood this week driving Patricia to the bus stop. I was in a four-way stop intersection, about to pull out, when I catch him coming from the left out of the corner of my eye. He didn’t even slow down for the stop sign, let alone stop. It would have been Darwinian if I’d hit him, but I’d still feel terrible.
I disagree that the one that rolled off the line was the last one. I was a VW mechanic as my first job out of high school. As far as I’m concerned, VW hasn’t built a Beetle since 1978. If it doesn’t have a flat-four air-cooled engine with a number 3 cylinder that eats valves and rings due to having its airflow cut off by the oil cooler, it’s not a Beetle, regardless of a vague resemblance of body type.