Need to find a narrated version of the video. I could clearly see where the first stage was, so confident it wasn’t that. I could also see the second stage shooting off, but from the second stage one dot was clearly visible; there could have been two. It looked like a flare with a parachute.
Saw it from the beach in LA, and it was very impressive. I have to admit I had no idea what I was looking at; funny how the altitude isn't obvious. The first stage separation was very distinctive, but the glow of the trail really made it amazing to watch.
I am still a little confused by the bright dot that appeared to fall into the ocean while the second stage kept glowing as you describe; presumably that was the payload after second stage separation, although my impression was that it was the payload fairing.
It is cheaper than modifying all the airports to provide exit immigration controls like nearly every other country in the world. By knowing who has left, you theoretically have a tally of who has not.
I'm torn on the issue; if CBP has the right to do it on arrival, what is different about it being on exit?
We have a number of people in our office that are semi-retired-- usually either working as 1099 independent contractors (often part time), but a couple take a few 1-3 month sabbaticals every so often, and one just works part time as an employee. It works for us, and generally works for them-- although I do see them handling stress poorly as deadlines come which worries me.
Me, I will provide 12-months notice. I can be replaced in a month pretty easily IMO, but as an owner of the company I do have some specific obligations. My partners will likely screw me over, but at least I already stole the red swingline.
Waypoints, departure times from the app (iPhone at least), street view integration, several others that escape me. From Google, I now need Maps, Waze, Earth, and the frigging web site to get what used to all be in one place.
Rapidly in a sub-transient (~6 cycle) level, not in a absolute frequency threshold. You need to see the first derivative of frequency (droop) reduce in order to engage more grid kW (traditionally). With a substantial IGBT grid-intertie system that only has a 2ms delay, you could potentially cause problems.
My guess is the problems were limited (if any at all) because there was enough spinning reserve to absorb the hit quickly; the other possibility is that the impedance between Tesla and the other plant was sufficient to mask voltage effects even if frequency response was instant.
But, it does make for a little bit of a head-scratcher when you think of how you set and coordinate grid protection while trying to maintain as robust of a system as you safely can.
The real problem is you have under-frequency relays that will trip off major transmission lines and generators if the frequency goes below a threshold, usually 0.5 Hz below nominal after a time delay. You will generally have sufficient "spinning reserve" to cover the loss of the biggest source on the grid, but your ramp-up time can be several seconds.
Tesla's IGBT inverters can presumably provide sub-cycle correction to the voltage (like any grid-connected inverter should), and stabilize the grid.
Unfortunately, what it might mean though is that Tesla's response is too quick, so the normal mechanisms in place to adjust other generator output aren't ramping up fast enough. Hope we get details at some point...
You don't necessarily need efficiency (or an SCR) for a backup system. Diesels would be cheaper, and for six concourses would likely be an easier approach, but it just comes down to how the distribution is set up and what single points of failure you want to manage.
That is one of the easiest things to take into account. Personally, I like the NY Times Rent vs Buy calculator. I had fancier spreadsheets, but this gives you an easy means of screening.
The hard factors to account for are the relative inflation rates of renting and buying.
Not everyone lives in the same house for 30+ years. Personally, I usually move every 5 years or so for one reason or another, which is why owning a home isn't a great value for me. If I had kids in school, maybe that would make me think that I need to stay put for 12 years and change the math... but as long as I see myself moving periodically that incentive isn't there.
But, as an investor, I am happy to own a place and rent it out, even if it is slightly negative on cash flow. Over time the cash flow improves with inflation, and ultimately you have sufficient equity to either leverage up with additional properties or sell for a larger property.
Typically, owning a home is more of an emotional investment than a financial one. People often get lost in that point.
Running the numbers is important. When I moved to Los Angeles, I expected to be here for a year or two max. Have been renting for 11 years now. While housing prices have appreciated beyond rational levels, it is only that which makes the equation for buying (retroactively) work. We put offers in on a few houses over the years, but our monthly costs would double, and the net return on investment is basically on par with what we get in our brokerage account, at best. (We bought a vacation home instead for what our down payment would have been.)
Real-estate is mainly an inflation hedge in the long term. It is helpful for diversification, and it can be something useful for survival, and it is a good way for people that can't save otherwise to be forced into it. It is a poor investment if you need to sell in less than 5-6 years, or if you end up buying a much bigger house than your present needs dictate to accommodate long-term family plans.
Housing in California is generally more of a localized issue rather than a state-wide issue. The fires fall into the same category; Marin, Napa, and Sonoma are pretty messed up in housing stock due to the fires (and SF, Alameda, Contra Costa, Santa Clara, and San Mateo were already screwed up).
Southern California is a different issue; the car culture lacks rational limits on commuting time. Temecula is now a bedroom community for Los Angeles, as are several other cities 70+ miles away. The sprawl is what limits rational development.
California logically needs more quality housing stock in self-sufficient, walkable communities; there is a large population that lives here until they have kids, then move "back home." This is a natural situation where renting works, but condos are fine too. Until the problem is addressed you will keep having people move to Oregon, Nevada, and Arizona and spreading the same problems there.
Nation-wide though, the real issue is smart development and anticipating 20-50% higher populations in 10 years in communities. You don't do that with "master planned communities" with thousands of single family homes 50-80 miles from where the jobs are.
It isn't as far off as you might imagine though. The Australian Tesla battery plant as an example could give the whole airport ~3 hours of ride-through. Break it up so you have backup at each substation and you are in pretty good shape.
A backup system limits the common points of failure with the primary system. While there are plenty of airports with co-generation plants that can backfeed the primary utility circuits supporting the airport, this is generally not considered a backup system. (LAX has about 20MW of generation in their central plant, but IIRC it doesn't have black-start capability, as an example.)
Airports have the benefit of being big; generally, a properly designed system will maintain reduced operations under failure conditions. It won't eliminate an incident, but it can drastically reduce the impact of a major problem. You can sacrifice a concourse, but you limit the impact on other concourses so you can keep moving in the degraded state.
It can be done pretty easily, it just costs money. Airports like Honolulu have on-site backup generation, but not sure what percentage of the load it covers— my guess would be about 65%.
For Atlanta the load should be around 35-40MW. 5-6 Turbines would cover it, but it would be about $20 million, and then you need to make sure your common points of failure with utility power are manageable, which would likely double the cost.
Owning regulations serve many purposes-- managing the character of a place, managing traffic, ensuring public open space and access to it, etc.
Where I live, multi-unit buildings are being demolished to make way for mansions that are occupied a few weeks per year; the only artificial zoning requirement is maximum building height, which is done for collective benefit (views). When the land is worth over $2,250 per square foot you just aren't going to be able to create middle-income homes.
The issue though is the failure to limit sprawl. Sprawl creates traffic problems and does force unnatural barriers on medium and high density development. When these things are done right, they make a positive impact on a community.
The problem is that your phone is discharging for 6-8 additional hours per day, and doing a fast charge to boost the battery. When you charge frequently from a low state, the phone tries to get as much capacity as quickly as it can each time; when you are charging from 50% it is doing a slow charge.
Tesla has the same issue with their superchargers; they don't recommend using them all the time.
Slashdot Mirror
Need to find a narrated version of the video. I could clearly see where the first stage was, so confident it wasn’t that. I could also see the second stage shooting off, but from the second stage one dot was clearly visible; there could have been two. It looked like a flare with a parachute.
Saw it from the beach in LA, and it was very impressive. I have to admit I had no idea what I was looking at; funny how the altitude isn't obvious. The first stage separation was very distinctive, but the glow of the trail really made it amazing to watch.
I am still a little confused by the bright dot that appeared to fall into the ocean while the second stage kept glowing as you describe; presumably that was the payload after second stage separation, although my impression was that it was the payload fairing.
Very cool and inspirational.
Sure... can we also get guaranteed flights WITH dogs next to us?
Agree; it is all about subscription revenue. AutoDesk, Adobe, and Microsoft aren't about to turn that away, so neither will the rest of the pack.
I would think it would start to make competitors more viable, but from where I sit it seems to further consolidate power.
They went through the security checkpoint, but you don't know that THEY took the flight; it could easily be a ticket-swap scam.
Every other country (I have been to) requires an immigration exit, aside from within the EU zone of course.
It is cheaper than modifying all the airports to provide exit immigration controls like nearly every other country in the world. By knowing who has left, you theoretically have a tally of who has not.
I'm torn on the issue; if CBP has the right to do it on arrival, what is different about it being on exit?
We have a number of people in our office that are semi-retired-- usually either working as 1099 independent contractors (often part time), but a couple take a few 1-3 month sabbaticals every so often, and one just works part time as an employee. It works for us, and generally works for them-- although I do see them handling stress poorly as deadlines come which worries me.
Me, I will provide 12-months notice. I can be replaced in a month pretty easily IMO, but as an owner of the company I do have some specific obligations. My partners will likely screw me over, but at least I already stole the red swingline.
Waypoints, departure times from the app (iPhone at least), street view integration, several others that escape me. From Google, I now need Maps, Waze, Earth, and the frigging web site to get what used to all be in one place.
Google maps was great... then they decide to take away features randomly that are extremely useful.
At least Apple Maps is consistent.
Rapidly in a sub-transient (~6 cycle) level, not in a absolute frequency threshold. You need to see the first derivative of frequency (droop) reduce in order to engage more grid kW (traditionally). With a substantial IGBT grid-intertie system that only has a 2ms delay, you could potentially cause problems.
My guess is the problems were limited (if any at all) because there was enough spinning reserve to absorb the hit quickly; the other possibility is that the impedance between Tesla and the other plant was sufficient to mask voltage effects even if frequency response was instant.
But, it does make for a little bit of a head-scratcher when you think of how you set and coordinate grid protection while trying to maintain as robust of a system as you safely can.
The real problem is you have under-frequency relays that will trip off major transmission lines and generators if the frequency goes below a threshold, usually 0.5 Hz below nominal after a time delay. You will generally have sufficient "spinning reserve" to cover the loss of the biggest source on the grid, but your ramp-up time can be several seconds.
Tesla's IGBT inverters can presumably provide sub-cycle correction to the voltage (like any grid-connected inverter should), and stabilize the grid.
Unfortunately, what it might mean though is that Tesla's response is too quick, so the normal mechanisms in place to adjust other generator output aren't ramping up fast enough. Hope we get details at some point...
You don't necessarily need efficiency (or an SCR) for a backup system. Diesels would be cheaper, and for six concourses would likely be an easier approach, but it just comes down to how the distribution is set up and what single points of failure you want to manage.
...because morons are driving their Teslas to the middle of nowhere to watch the solar eclipse and then driving back...?!
That is just stupidity causing problems.
That is one of the easiest things to take into account. Personally, I like the NY Times Rent vs Buy calculator. I had fancier spreadsheets, but this gives you an easy means of screening.
The hard factors to account for are the relative inflation rates of renting and buying.
Not everyone lives in the same house for 30+ years. Personally, I usually move every 5 years or so for one reason or another, which is why owning a home isn't a great value for me. If I had kids in school, maybe that would make me think that I need to stay put for 12 years and change the math... but as long as I see myself moving periodically that incentive isn't there.
But, as an investor, I am happy to own a place and rent it out, even if it is slightly negative on cash flow. Over time the cash flow improves with inflation, and ultimately you have sufficient equity to either leverage up with additional properties or sell for a larger property.
Typically, owning a home is more of an emotional investment than a financial one. People often get lost in that point.
Running the numbers is important. When I moved to Los Angeles, I expected to be here for a year or two max. Have been renting for 11 years now. While housing prices have appreciated beyond rational levels, it is only that which makes the equation for buying (retroactively) work. We put offers in on a few houses over the years, but our monthly costs would double, and the net return on investment is basically on par with what we get in our brokerage account, at best. (We bought a vacation home instead for what our down payment would have been.)
Real-estate is mainly an inflation hedge in the long term. It is helpful for diversification, and it can be something useful for survival, and it is a good way for people that can't save otherwise to be forced into it. It is a poor investment if you need to sell in less than 5-6 years, or if you end up buying a much bigger house than your present needs dictate to accommodate long-term family plans.
C'mon... do you really have to piss on everyone's Monday morning...?
Of course you are correct; kids change the dynamic.
Housing in California is generally more of a localized issue rather than a state-wide issue. The fires fall into the same category; Marin, Napa, and Sonoma are pretty messed up in housing stock due to the fires (and SF, Alameda, Contra Costa, Santa Clara, and San Mateo were already screwed up).
Southern California is a different issue; the car culture lacks rational limits on commuting time. Temecula is now a bedroom community for Los Angeles, as are several other cities 70+ miles away. The sprawl is what limits rational development.
California logically needs more quality housing stock in self-sufficient, walkable communities; there is a large population that lives here until they have kids, then move "back home." This is a natural situation where renting works, but condos are fine too. Until the problem is addressed you will keep having people move to Oregon, Nevada, and Arizona and spreading the same problems there.
Nation-wide though, the real issue is smart development and anticipating 20-50% higher populations in 10 years in communities. You don't do that with "master planned communities" with thousands of single family homes 50-80 miles from where the jobs are.
The grid storage projection Australia. 129MWh.
It isn't as far off as you might imagine though. The Australian Tesla battery plant as an example could give the whole airport ~3 hours of ride-through. Break it up so you have backup at each substation and you are in pretty good shape.
A backup system limits the common points of failure with the primary system. While there are plenty of airports with co-generation plants that can backfeed the primary utility circuits supporting the airport, this is generally not considered a backup system. (LAX has about 20MW of generation in their central plant, but IIRC it doesn't have black-start capability, as an example.)
Airports have the benefit of being big; generally, a properly designed system will maintain reduced operations under failure conditions. It won't eliminate an incident, but it can drastically reduce the impact of a major problem. You can sacrifice a concourse, but you limit the impact on other concourses so you can keep moving in the degraded state.
It can be done pretty easily, it just costs money. Airports like Honolulu have on-site backup generation, but not sure what percentage of the load it covers— my guess would be about 65%.
For Atlanta the load should be around 35-40MW. 5-6 Turbines would cover it, but it would be about $20 million, and then you need to make sure your common points of failure with utility power are manageable, which would likely double the cost.
...and all the diapers saved!!
Owning regulations serve many purposes-- managing the character of a place, managing traffic, ensuring public open space and access to it, etc.
Where I live, multi-unit buildings are being demolished to make way for mansions that are occupied a few weeks per year; the only artificial zoning requirement is maximum building height, which is done for collective benefit (views). When the land is worth over $2,250 per square foot you just aren't going to be able to create middle-income homes.
The issue though is the failure to limit sprawl. Sprawl creates traffic problems and does force unnatural barriers on medium and high density development. When these things are done right, they make a positive impact on a community.
The problem is that your phone is discharging for 6-8 additional hours per day, and doing a fast charge to boost the battery. When you charge frequently from a low state, the phone tries to get as much capacity as quickly as it can each time; when you are charging from 50% it is doing a slow charge.
Tesla has the same issue with their superchargers; they don't recommend using them all the time.