Chapters (34)
- Cover
- Project Hail Mary
- Acknowledgments
- Chapter 1
- Chapter 2
- Chapter 3
- Chapter 4
- Chapter 5
- Chapter 6
- Chapter 7
- Chapter 8
- Chapter 9
- Chapter 10
- Chapter 11
- Chapter 12
- Chapter 13
- Chapter 14
- Chapter 15
- Chapter 16
- Chapter 17
- Chapter 18
- Chapter 19
- Chapter 20
- Chapter 21
- Chapter 22
- Chapter 23
- Chapter 24
- Chapter 25
- Chapter 26
- Chapter 27
- Chapter 28
- Chapter 29
- Chapter 30
- About the Author
I bring up a spreadsheet and start typing in numbers. “We need 0.4cubic meters of xenonite. Can you make that much?”
“Yes,” he says. “Have enough liquids remain to make 0.61 cubic meters.”
“Okay. Then I have… an idea.” I steeple my fingers.
It’s a simple idea, but also stupid. Thing is, when stupid ideas work, they become genius ideas. We’ll see which way this one falls.
The Astrophage breeding grounds are 10 kilometers into the atmosphere of Adrian. I can’t fly the Hail Mary that low because the air is too thick and I’d burn up. I can’t use the engines in the atmosphere because then all heck breaks loose and everything blows up.
So, it’s time to go fishing. We’re going to make a 10-kilometer-long chain, put a sampling device of some kind on the end (Rocky will make that), and drag it through the atmosphere. Easy enough, right?
Wrong.
The Hail Mary has to maintain a velocity of 12.6 kilometers per second to stay in orbit. Any slower and we’ll decay and burn up. But if we drag a chain through the air at that velocity—even a xenonite chain—it’ll get torn up and vaporized.
So we have to go slower. But going slower means falling toward the planet. Unless I use the engines to constantly maintain altitude. But if I do that, I’d be thrusting directly away from the chain and sample device. The exhaust from the engines will vaporize all of it.
So we’ll thrust at an angle. Simple as that.
It’ll look absolutely ridiculous. The Hail Mary will be tilted to 30 degrees from vertical, thrusting upward at that angle. Below it, the chain will dangle 10 kilometers into the air straight down. The atmosphere behind the thrusters will be in a constant state of ionized fire. It should be quite a show. But it’ll be behind us and the chain will be passing through unaffected air.
All told, our lateral velocity will be just over 100 meters per second. The chain can handle that speed in the thin high-altitude air, no problem. I calculated that it’ll only deflect about 2 degrees from vertical.
Once we feel like we have a sample, we skedaddle. What could possibly go wrong!
I say that ironically.
I’m not the greatest 3-D modeler, but I’m able to make a chain link in CAD reasonably well. It’s not a normal oval link, though. It’s mostly oval, but with a thin opening for another link to enter. Easy to assemble the links, but extremely unlikely for them to rattle apart. Especially when they’re under tension.
I grab a block of aluminum and mount it in the mill.
“This will work, question?” Rocky asks from his ceiling tunnel.
“It should,” I say.
I fire up the mill and it gets right to work. It drills out the mold for a chain link exactly the way I’d hoped.