If we look at jet aircraft, wear depends on the airframe and the engines, and the airframe seems to be the number of pressurize/depressurize cycles as well as the running hours. Engines get swapped out routinely but when the airframe has enough stress it's time to retire the aircraft lest it suffer catastrophic failure. Rockets are different in scale (much greater stresses) but we can expect the failure points due to age to be those two, with the addition of one main rocket-specific failure point: cryogenic tanks.
How long each will be reliable can be established using ground-based environmental testing. Nobody has the numbers for Falcon 9R yet.
Weight vs. reusable life will become a design decision in rocket design.
I live in a port city and see lots of ships, but I'm not sure this baby could even enter the harbour here.
It's far bigger than what the Panama Canal can handle (maximum 290 meters long), as well as the Saint Lawrence Seaway (225 meters). The Panama Canal was designed for the largest ships of the day, RMS Olympic and RMS Titanic.
I'm intrigued at the possibilities, but haven't come up with a compelling reason to buy one.
Yeah, because litigation is the best social tool and we should be using more of it.
How about, if you come down with something, it's your problem for not getting yourself vaccinated.
Please, RTFS, or learn something about this topic before offering your attempt at insight, please. Some people are unable to get vaccinated (infants, those with certain diseases, etc.), and for some small percent, the vaccines don't work. If they get the disease, it's their fault, too? Or you just don't want to consider anything as complicated as the effects of one person's behavior on another person?
My sister used to raise her own turkeys. Up close they looked like something from a paleontology textbook, but they were still good-natured, very curious creatures. They would always come up to you and inspect you, talking all the time. Maybe they were just demanding food. Dunno.
They ate good stuff, they had a big enough pen that they could run around to their heart's content, they were basically happy turkeys. And it showed: they had a wonderful flavour and a nice texture.
Basic plug strip for the cord that comes out of my computer. I don't have a cord coming out of my armpit...
I remember a few years ago seeing the 1960s Canadian TV series Wojeck, and it carried a viewer discretion warning that the standards for personal and professional relationships had changed since the program was produced. There was a certain element of "like, duh!", but somebody had thought about it, and I had no problem with it.
Fast forward to the present day. I'm watching Swedish sci-fi show Äcta Människor ("Real Humans" in English). It quietly avoids any gratuitous sex or violence, but there is lots of non-gratuitous sex and violence, as integral parts of the plot. Like all Scandinavian shows it has interesting female characters who do in fact talk to each other about something other than men. That's the sort of culture they want, it's one I admire, and I'm cool with it.
Like others I found the headline confusing. I read it as "Researchers are predicting the use of Wikipedia as a vector for the spread of disease". This may mean that:
- Disinformation and ignorance are diseases.
- Memes and computer viruses are diseases.
- Wilipedia contains information that leads to depression.
- Instructions on Wikipedia lead to substance abuse.
- This is getting entertaining, fill in your own reason here.
Automate basic jobs, so I can talk to humans.
I view this as an extension of using cruise control in a car, or an autopilot in a plane. Let robots do what they're good at, so humans can do what they are good at.
My Dad was 68 when he died. My Mom was 75. I'm 53 now. If I significantly outlive either of them I will be surprised.
One of the definitions I found was:
One who makes great sacrifices or suffers much in order to further a belief, cause, or principle.
I am sure that fits. While SpaceShip II is mainly intended for a non-exploration purpose, the program has resulted in some significant advances in rocketry and White Knight II has significant non-tourism use. These pilots have been involved in other space efforts, I remember the one who was injured from the Rotary Rocket test flights. There are lots of safer ways for these folks to make as much money as a test pilot is paid. They do what they do to advance our progress in aeronautics and space.