Category Archives: Political Commentary

Jerry Pournelle

Rest in peace (I have no idea how to copy/paste on these damned finger painting devices, but Instapundit has a text from his son, Alex)). He was an amazing person with an amazing life. I last saw him when I dropped by Chaos Manor a couple years ago to give him a copy of my book, which he reviewed very nicely.

I’ll have more to say when I’ve survived the hurricane and gotten back to a real computer.

[Sunday-morning update, as the winds rise outside our Boynton Beach apartment]

Sarah Hoyt remembers someone she considered a friend and colleague.

When I stopped by to see him a couple years ago, we talked about what was happening with SpaceX and NASA in general, and reminisced about our long-time mutual friend Bill Haynes, whom he hadn’t been aware had been killed in an auto accident on Palos Verdes on his way to church a couple years earlier (both Buzz and I had delivered a eulogy, but I think that Jerry was too sick at the time). It was a tough conversation because his hearing was shot, both from the brain cancer that he’d survived, but long-term from being an artillery handler in Korea. When Roberta let me into the library, I had to figure out how to get his attention without startling him, because the bell wasn’t doing so. I was unsuccessful, but he had no problem once he realized the unexpected intruder was me.

Heading back to LA, probably Tuesday, maybe Wednesday, Irma and American Airlines willing. I hope I’ll be able to attend the service and see a lot of old (sadly, in both senses of the word) friends.

[Late-evening update on Sunday]

J. Neil Schumann has some remembrances, too. I suspect we’ll see a lot of this over the next few days.

[Monday-morning update]

Glenn Reynolds writes that, as a kid in the gloomy 70s, Jerry gave him (and many others) hope for a better future.

The Insanity Of Global Warming Hysteria

A simple proof:

as a person familiar with both mathematics and computer science, this variation is not odd, in fact it’s completely understandable. After all a computer model is based on the best possible guesses from the available data and hurricanes are “complex natural phenomena that involve multiple interacting processes” so there is nothing at all odd about there being a 850 mile variation as to where it will it. As we get closer to Sunday and we have true data to input the variation in the models will correspondingly decrease.

Now apply this to climate change models telling us we face disaster in 100 years.

You aren’t dealing with a single “complex natural phenomena that involve multiple interacting processes” you are dealing with EVERY complex natural phenomena that involve multiple interacting processes that exists on the earth. Every single additional item you add increases the variation of the data models. Furthermore you are also dealing with variations in the sun, variations in the orbits of the earth, its moon and more.

And that’s just the variations in natural phenomena, imagine the variation in industrial output on the entire planet for a period of 50 or 100 years.

Think of the computer modeling and tracking of that single hurricane and apply this thinking to the climate of the earth as a whole. How accurate that model is going to be over 100 years, 50 years, 25 years or even ten years?

Would you be willing to bet even your short term economic future on it, would anyone in their right mind do so?

Not me.

Falcon Heavy

Leonard David has a story on its prospects for initial success, with quotes from Yours Truly.

To expand on the point, while he didn’t include it, I told Leonard in email:

The other issue is not launch reliability, but schedule reliability. SpaceX has aborted launches of the Falcon 9 when one or more of the engines was indicating performance issues on ignition. Three times as many engines means a lot higher probability of having an issue with one of them. For example, while I don’t know what the ignition reliability of a Merlin D is, suppose it’s 99% (that is, there’s a one in a hundred chance of failure to perform up to spec on ignition). For nine engines, that means the probability of a Falcon 9 aborting on the pad due to an engine issue would be one minus 0.99 to the ninth power, or about 8% per flight, or about once every dozen flights (which doesn’t seem that far off from their record). I don’t know what their flight rules will be for the Heavy, but if they have the same rule that they can’t take off with an underperforming engine, the reliability for twenty-seven engines will be one minus 0.99 to the 27th power, or 24%. That is, if they’re only 0.99 reliable per engine, and require all engines operating properly to take off, they have about a one in four chance of aborting a Falcon Heavy every single flight. That says to me that either they think Merlin reliability is greater than that (which it could well be) or that they’ll relax the rules to allow engine out from liftoff, or perhaps both.

Regardless, here’s hoping for a successful flight in less than three months.