limitedfrom
Data centers raise nearby temperatures by up to 4 degrees in Phoenix
The Very American, Intense World of High-School Debate
[1] https://worksinprogress.co/issue/why-japan-has-such-good-rai...
https://eng.vsco.co/reviving-kodachrome/
[0] https://emulsive.org/articles/darkroom/developing-film/they-...
As for the cider company, sounds like they've been selling it like it since 1913[2], but registered it in 1919? My guess is that since it was a regional product with the product type in the name that's already established (like [3]), they allowed it.
[0] https://ja.wikipedia.org/wiki/%E3%82%B9%E3%83%AA%E3%83%BC%E3... (translated: https://ja-m-wikipedia-org.translate.goog/wiki/%E3%82%B9%E3%...) [1] https://www.buzzfeed.com/jp/kenjiando/mitsubishi-pencil [2] https://www.mitsubishi.com/ja/series/yataro/11/ [3] https://ja.m.wikipedia.org/wiki/%E5%9C%B0%E5%9F%9F%E5%9B%A3%...
[0] https://ko.wikipedia.org/wiki/%EA%B9%80%EC%B9%98%EB%83%89%EC... [1] https://namu.wiki/w/%EA%B9%80%EC%B9%98%EB%83%89%EC%9E%A5%EA%... [2] https://ift.onlinelibrary.wiley.com/doi/abs/10.1111/1750-384...
[1] Example here https://www.lge.co.kr/support/product-manuals?title=manual&m..., see table on page 10, it's between -0.7°C and -1.7°C for kimchi.
[0] https://www.npr.org/sections/parallels/2013/11/30/244995264/... [1] https://imgur.com/source-http-wp-me-poxsk-pq-8IFLFoJ
[0] https://en.wikipedia.org/wiki/Deborah_Smith_(translator)
One can have a few 155 mi range vehicles for field trips, sports games, etc. but the majority of the fleet can be much smaller for every day uses.
[0] https://www.nrel.gov/docs/fy14osti/60068.pdf [1] https://www.ridezum.com/blog/electric-school-buses-the-benef... [2] https://gopublicschoolsoakland.org/wp-content/uploads/2016/0...
Also, for the SFMTA[0] as an example, different routes use different vehicles depending on the size & route & electrification. It doesn't have to be air travel to want a few varieties to fit all the needs.
Here are some stats[1, page 3]: An average school bus route is 32 miles, with max observed being 127 miles (and this is most likely a very rural route, not like the Oakland example here; in fact, here's an average of student distances for Oakland[2]). Given such a long time period between school start and end times, I expect most of these to be able to be charged between the two shifts with the exception of some field trips.
If you look at the Zum website, their buses are capable of 155 miles[3]. I suspect this was designed to fit the highest range case described in the paper, but almost 5x the average route distance. For most non-rural school districts, even if you account for some detours and faulty charging even, x2 (or x3, sure) seems reasonable to keep as the majority of the fleet. And perhaps you can keep a few of the largest range ones if the school regularly has field trips in that range.
For what it's worth, ETOPS regulations are interesting look for how aviation deals with failure modes for range/routing. Assuming failures are rare, the idea is to ensure the planes have enough to get to safety, not just put as much range as possible on all the planes.
[0] https://en.wikipedia.org/wiki/San_Francisco_Municipal_Railwa... [1] https://www.nrel.gov/docs/fy14osti/60068.pdf [2] https://gopublicschoolsoakland.org/wp-content/uploads/2016/0... [3] https://www.ridezum.com/blog/electric-school-buses-the-benef...
1) School districts could buy a mixture of different ranged buses to fit their needs. After all, airlines have a mixture of planes in the fleet for different range / needs and not just have all the fleet be the largest / longest range model, and
2) The manufacturer offers range conversions later since it's a more commercial use than consumer EVs, especially when they want to sell it to different school districts. They probably need to do battery swaps when batteries degrade beyond a certain degree anyway.
Carrying additional capacity takes a lot of material (that could be used for other batteries especially) and energy. I get that it's convenient, but I hope folks put a little care into it than just put large batteries everywhere.
This just sounds like the batteries are oversized for the application and they're carrying unnecessary weight around all day. Consumer EVs are doing this to an insane degree all day for "range anxiety", but I can't help but think that well defined space like school buses could be sized much closer to the true requirements.
[1] https://www.epa.gov/newsreleases/epa-determines-lead-emissio... [2] https://www.nbcnews.com/business/business-news/leaded-gas-wa...
That said, looking at the website for the main post, I don't think that's the main use case it has in mind: top banner rotating between "Flying made easy for first-time aviators/weekend trips/avoiding traffic" or "We believe the freedom of flying is an unparalleled experience that everyone deserves access to" and "The power of flight is intoxicating".
It's great if existing use cases of GA aircrafts have sleeker/more intuitive interfaces, but adding demand in this area (more hobbyists, more rich people using it for shuttling/avoiding traffic, encouraging people to live in very remote areas, etc.) and using it as transportation-mode will unlikely ever become environmentally reasonable.
As for highway speeds, cars are calibrated to have the highest efficiency at highway speeds[2][3], so per distance, most cars will do best at reasonable highway speeds.
[1] https://news.ycombinator.com/item?id=41166749 [2] https://www.researchgate.net/figure/Speed-fuel-consumption-c... [3] https://qph.cf2.quoracdn.net/main-qimg-2ddbd8f31c84cefba540d...
Ikarus C42 at about 86 knots will use 13 L/hr, for a two-hour flight, it's 26 L fuel and 8.31 kg CO2/gal avgas[1], this comes to 57 kg CO2 to cover 320 km (and this is assuming it immediately starts covering flight distance and not using gas for climbing/approach, etc.).
An average new car in the EU uses 6 L/100 km in 2019[2]. To drive 320 km, this comes to 19 L of gasoline (8.1kg CO2/gallon finished motor gasoline[1]), which is then 41 kg CO2.
Even if you had to make the auto trip 400 km because roads aren't as direct, this comes to 51 kg CO2.
Nevermind that airports are rarely your final destination, nor in the city centre like train station would be, which adds significant distance to your overall trip.
[1] https://www.eia.gov/environment/emissions/co2_vol_mass.php [2] https://www.iea.org/articles/fuel-economy-in-the-european-un...