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Re:Will we ever fly supersonically over land? by harimau777 on Saturday July 03, 2021 @03:56PM (#27724353)
Unless we dramatically increase vacation time or dramatically increase rail speeds, that would mean that many people would not be able to see their families and friends or travel to events.
Re:Will we ever fly supersonically over land? by marcosdumay on Saturday July 03, 2021 @04:32PM (#27724656)
Well, in a plane trip you have 3 lost hours before it starts and after it ends, so a normal train, running at 130km/h will be faster than a plane at 850km/h for any trip of less than ~460km.

If you make it a fast train, at 350km/h, it will beat the plane on any trip up to 1700km.

Most trips are short, so no, most trips can be done by train and people still spend less time on them than by plane.

Re:Will we ever fly supersonically over land? by cortesoft on Saturday July 03, 2021 @04:41PM (#27724730)
I live in Southern California, with family in Kansas, Wisconsin, and New York. The closest one is 2500kms away. The longest is almost 5000kms A train would take a lot longer than a plane.

Even more than just the distance, though, is the fact that there would be no practical way to have direct rail lines to every major city in the US.

Trains are useful, but there is no way they could replace air travel in the US.

Re:Will we ever fly supersonically over land? by throw0101a on Sunday July 04, 2021 @08:34AM (#27729182)
> I live in Southern California, with family in Kansas, Wisconsin, and New York. The closest one is 2500kms away. The longest is almost 5000kms A train would take a lot longer than a plane.

Perhaps people/families have spread themselves all over the continent because in the past energy has been 'too cheap' (i.e., didn't price in externalities).

With carbon pricing people may make different decisions in how far they want to travel from their 'home town', and what that would mean for seeing family.

>95% of the population of the US (and CA) are people who moved across an ocean and had basically zero expectation of seeing their families once they left. The only communication would be letters, telegraphs, and later trans-oceanic telephone calls.

Given the realities of climate change, and what it's cost us with regards to damage to the planet, expectations need to adjust.

Re:Will we ever fly supersonically over land? by pyuser583 on Sunday July 04, 2021 @11:16AM (#27730279)
Travel is extremely economically important, especially for the poor.

Living in a poor, rural county with poor schools and few jobs can really mess things up.

Someone I know is getting divorced.

She was a very high earner who moved to a low-cost of living, low wage area to be with her husbands family.

She had previously earned very high wages, but took a significant pay cut to live with in-laws.

As the divorce is concluding, she realizing that the terms of the divorce prohibit her from taking the kids out of state.

Which means until her kids are 18, she’s effectively trapped in a market where her MS in Engineering gets her a job at Walmart.

She had previously worked for a major firm in New York, and then worked for a the local government until she had to resign.

So she’s basically screwed.

Plenty of people have skills and credentials that can only be used with relocation. A MA in Journalism isn’t very helpful outside big cities.

Re:Will we ever fly supersonically over land? by throw0101a on Sunday July 04, 2021 @02:35PM (#27731663)
> Travel is extremely economically important, especially for the poor.

"Travel" or "movement"?

I am the first generation to be born in the country I live in. When my (grand)parents left, they left under the assumption that there would be no, or maybe very little, chance of going back to the Old Country. They took a boat over the course of many weeks to traverse an ocean; an era before cheap air travel.

When people move in the future, to hopefully have a better life than where they current are, it may be that they may not be able to go back (as easily) to where they came from.

The fact that we can now travel back and forth cheaply over great distances could simply be a temporary blip in human history, and we should perhaps consider this era could be ending. You can still move, but it will be more 'permanent' going forward, and travel is will be less frequent/easy/cheap/etc.

Re:Will we ever fly supersonically over land? by harimau777 on Sunday July 04, 2021 @04:41PM (#27732459)
Unless you can move your entire family, then movement implies travel at least twice a year in the US.
Re:Will we ever fly supersonically over land? by throw0101a on Sunday July 04, 2021 @05:59PM (#27732965)
> […] then movement implies travel at least twice a year in the US.

Under the current regime of 'cheap' travel in which the externalities of climate change are probably not taken into account.

Re:Will we ever fly supersonically over land? by LargoLasskhyfv on Sunday July 04, 2021 @05:37PM (#27732822)
Why? Building a community, grass roots style, on the net...fight the right. Righten the flight. Show where to go with flow. Make it glow...
Re:Will we ever fly supersonically over land? by marcosdumay on Monday July 05, 2021 @09:33AM (#27737797)
Yes, you are not on that "most" category. (But that 2500km is close to it, so trains may still be more comfortable.)

to be fair, even for short trips trains require a minimum passenger flux before it's more efficient than planes. So even strictly talking about carbon emissions, trains are a net loss for most trajectories, but a large gain for most passengers.

Re:Will we ever fly supersonically over land? by ant6n on Saturday July 03, 2021 @07:21PM (#27725833)
Well, if there was no air travel, rail lines everywhere would likely be practical... again.

If trains could go 250km/h on average, that 5000km trip would take 20 hours - that's plausible for an overnight trip, leave 6pm, arrive 10am. A flight over this is distance is probably a much more stressful red eye.

Sure this is quite speculative, but perhaps less so than hyperloop dreams, or supersonic aircraft that somehow have no environmental impact.

Re:Will we ever fly supersonically over land? by cortesoft on Saturday July 03, 2021 @09:45PM (#27726666)
That seems a strange argument… yes, if we didn’t have planes, trains would be our best option… but it would be a much worse experience. 20 hours is a lot longer than the 5 it takes me to fly to New York.

If there was no air travel, I would just travel a lot less. If you want to argue that the environmental cost of air travel is too great to allow it to happen is one thing, but done act like it wouldn’t make the travel experience a lot worse.

Re:Will we ever fly supersonically over land? by Gibbon1 on Sunday July 04, 2021 @04:05AM (#27728036)
I'd like to see a graph of miles flown per year by decile.

internet foo

Found this. As I suspected, hockey stick graph.

https://news.gallup.com/poll/1579/airlines.aspx

Half the people in the US don't fly at all. 25% fly 1-2 times a year. People that don't fly at all, and people that fly 1-2 times year. Probably wouldn't be much impacted if they had to take a high speed train instead of a plane.

Re:Will we ever fly supersonically over land? by ant6n on Sunday July 04, 2021 @10:18AM (#27729788)
It’s not a strange argument. Read the discussion again, which starts with the thesis

> All overland passenger transport should be rail.

Then it was claimed that this is impossible. My argument is saying it’s possible to have rail replace rail, for example if air travel was severely restricted.

Re:Will we ever fly supersonically over land? by sokoloff on Saturday July 03, 2021 @08:12PM (#27726113)
6 PM to 10 AM is only 16 hours. Even with 3 time zones, you’d only be at 19 hours. 250kph straight line equivalent is unlikely given the terrain in the way (Rocky Mountains, primarily).
Re:Will we ever fly supersonically over land? by ClumsyPilot on Saturday July 03, 2021 @09:58PM (#27726709)
Tonnels, we are made massive ones through the alps in europe

https://en.m.wikipedia.org/wiki/Gotthard_Base_Tunnel

Re:Will we ever fly supersonically over land? by inglor_cz on Sunday July 04, 2021 @03:40AM (#27727952)
Gotthard is impressive, but it took the Swiss 17 years to build it. Nearby, Brenner Base Tunnel is under construction between Italy and Austria, and it is expected to take 25 years to complete.

I can't imagine how long would it take to tunnel through the Rockies. Look at the map, they are far wider than the Alps. Getting through the Rockies is like getting from Denmark to Croatia.

Re:Will we ever fly supersonically over land? by LargoLasskhyfv on Sunday July 04, 2021 @05:51PM (#27732915)
Use the Army Corps of Engineers, Navy Sea Bees, something like that. Look at https://en.wikipedia.org/wiki/Seikan_Tunnel going between islands under the Japan Seas in an earthquake area.

Think BIGGRRRR! (Aggressively so, instead of sissying around!)

edit: also not to forget about 'Nuclear Tunnel Boring Machines/Subterrene' https://havacuppahemlock1.blogspot.com/2015/06/nuclear-power...

cf. "Trans-Planetary Subway Systems

A Burgeoning Capability

by Robert M. Salter

February 1978"

https://www.rand.org/pubs/papers/P6092.html

Re:Will we ever fly supersonically over land? by ClumsyPilot on Sunday July 04, 2021 @07:35AM (#27728915)
Better get started soon then! Once you make a tonnel, it stays there forever, it's a good investment
Re:Will we ever fly supersonically over land? by sokoloff on Sunday July 04, 2021 @09:32AM (#27729486)
Indeed, if we want tunnels to make a rail network cross the Rockies, we had really better get started, since you'd need 5 east-west routes to make trains practical ("less impractical"?) to cross the Rockies. No one is going to take an additional 1000 mile (7+ hour) diversion north-south to pass through a tunnel to repeat that north-south diversion on the other side.
Re:Will we ever fly supersonically over land? by ant6n on Sunday July 04, 2021 @11:13PM (#27734333)
China built tens of thousands of km of high speed rail for 350km/h. Largely using prefab elevated tracks, with occasional tunnels.

Again it’s difficult, but possible if a replacement for air travel was considered a necessity.

Re:Will we ever fly supersonically over land? by LargoLasskhyfv on Sunday July 04, 2021 @05:31PM (#27732781)
/me hypes the loop...
Re:Will we ever fly supersonically over land? by sokoloff on Saturday July 03, 2021 @08:11PM (#27726106)
I don’t lose 6 hours on a typical airline trip. Domestic, I tend to arrive around an hour before gate close time. International from the US, about 90 minutes. For a train, I’d still plan on a 30 minute safety buffer (to protect against en route delays to the station). Add another 30 minutes over the train for boarding, push, and taxi. So, I’m probably giving up an hour plus/minus however closer the train station is vs the airport.

Arriving, baggage claim rarely takes more than 30 minutes. (Delta “guarantees” 20 minutes on domestic flights.) With no checked bags, it’s the 10 minute walk through the airport and then plus/minus ground transport differences vs the train.

I can’t imagine that most people are spotting the train a 6 hour head-start, unless the live upstairs from the train station and are extremely nervous about missing their flight.

Re:Will we ever fly supersonically over land? by jaclaz on Sunday July 04, 2021 @03:32AM (#27727920)
Of course it depends, but train stations tend to be in the center of a city, so you start from the center of A and arrive to the center of B.

With planes, airports are way off the city centre, I think that there are few airports (here in Europe) serving large cities that can be reached in less than 1 hour from the city centre, and that applies to both A and B, to this you add, unless you use a private means of transportation (car-taxi), a half an hour for the timetable of the bus or train you need to take to/from the airport, as it won't necessarily be synchronized with your flight departure/arrival.

Re:Will we ever fly supersonically over land? by Leherenn on Monday July 05, 2021 @04:12PM (#27741434)
That kinda implies you leave and go to the city centre each time, which might not be the case. Living next to a major train station is usually very expensive. If you're visiting family in the suburbs, you might be closer to the airport than the city centre (or be "unlucky" and have the airport on the other side of the city). It sounds pretty situational to me.
Re:Will we ever fly supersonically over land? by LargoLasskhyfv on Sunday July 04, 2021 @06:29PM (#27733146)
Re:Will we ever fly supersonically over land? by marcosdumay on Monday July 05, 2021 @09:38AM (#27737844)
The numbers on my comment are for 3 hours, not 6. (Yeah, the text is not very clear on that.)
Re:Will we ever fly supersonically over land? by jaclaz on Sunday July 04, 2021 @03:25AM (#27727891)
Yes, and for longer trips, besides the high speed trains, there are (were) also night trains, but for some reasons most of them were canceled (and/or the prices became less and less competitive), an old thread about this:

https://news.ycombinator.com/item?id=19557848

Maybe they will start to organize a few more of these trains, the level of stress was so much lower on (overnight) trains when compared to planes when moving in Europe.

Re:Will we ever fly supersonically over land? by LargoLasskhyfv on Sunday July 04, 2021 @06:43PM (#27733207)
That trend of canceling them seems to be in reversal, at least a bit. https://www.nightjet.com/en/reiseziele
Re:Will we ever fly supersonically over land? by ClumsyPilot on Saturday July 03, 2021 @04:03PM (#27724429)
If we had high-speed rail everywhere at 300km/h you can cross almost any country overnight, that radius of 3600km would give you 80% of all plane travel.
Re:Will we ever fly supersonically over land? by beerandt on Saturday July 03, 2021 @04:24PM (#27724596)
At energy and cost levels that exceed airline travel, per passenger-mile.
Re:Will we ever fly supersonically over land? by crazygringo on Saturday July 03, 2021 @04:42PM (#27724745)
Do you have a citation for that?

Quick Googling doesn't reveal any obvious authoritative answers (but a ton of guessing and unsubstantiated claims). The most authoritative/unbiased source seems to be this Wikipedia article:

https://en.wikipedia.org/wiki/Energy_efficiency_in_transport

But the head-to-head comparisons are mostly gaps when it comes to trains, and the sections on trains and planes are in completely different families of units that makes comparison extremely non-trivial. :(

Re:Will we ever fly supersonically over land? by beerandt on Saturday July 03, 2021 @08:15PM (#27726139)
It was covered in a sustainable engineering class I took.

There's not much generic into about it because every rail route proposal is different, even between the same destinations. Depends a lot on geography and what's already there.

You basically need to do a full Life Cycle Analysis (LCA) for each route.

Sometimes they're included in the EIS for a proposed project. That's prob the best place to start.

But there's a reason most of the rail routes that keep getting proposed in the US are regional. Track and right-of-way is expensive, in both dollars and energy. Even moreso with high speed, where you need grade-seperated crossings and long, wide turns.

Most people think track is shareable or reusable, but the real world limits to track capacity (trains per day) makes economies of scale difficult to implement.

I posted it elsewhere, but the practical limit for non-high-speed rail is 300-400 miles, before airplanes start to make more sense.

High speed is difficult to even estimate, since we don't have much here to base it on.

Re:Will we ever fly supersonically over land? by ClumsyPilot on Saturday July 03, 2021 @09:29PM (#27726603)
China has more high-speed than the rest of the world combined, with even remote parts of China hooked up to the rail network.

And when you compare energy, you have to take into account that Rail is already electric, powered directly by grid without batteries or any other efficiency loss in between.

Airplanes use fuel that takes a lot of energy to refine and deliver, and will at best use hydrogen in 15 years which is 40% efficient to produce, plus losses in compression, delivery, engine, etc.

Re:Will we ever fly supersonically over land? by beerandt on Saturday July 03, 2021 @10:57PM (#27726912)
I'm not against it. But it's usually not more energy efficient. Life Cycle Analysis takes all the inefficiencies you mention into account, down to the zip code, and includes thing like present and future mix of electrical generation.

Doing it because China is, isn't really a reason.

You can take into account electrifying rail, but it doesn't really change much. This all gets taken into account.

>other efficiency loss in between.

The grid has plenty of inefficiencies, especially if we have to start designing beyond capacity to account for intermittent sources. But electricity's main inefficiency is in its creation.

LCAs take all of this into account. It's the whole purpose of doing one. Embedded energy involved in manufacture, refining, transport, everything, is all added up based on things like location and present and/or future inputs.

Re:Will we ever fly supersonically over land? by inglor_cz on Sunday July 04, 2021 @03:44AM (#27727961)
One of the reasons why China built such a network so fast is the top-down structure of the state. If the authorities decide to build something just across your neighbourhood, you are in no position to challenge them.

Although I like trains, I wouldn't want to live in such society.

Re:Will we ever fly supersonically over land? by crazygringo on Sunday July 04, 2021 @02:15PM (#27731553)
Thanks. Is there at least some kind of super-elementary comparison?

E.g. energy consumption per-passenger-mile for a fully occupied Japanese bullet train while moving at maximum speed, versus for a fully occupied Boeing 737 at cruising altitude?

Obviously there are a million other factors, like takeoffs and landings, and trains stopping, as well as fuel vs electric, but wondering about even just the most basic operation.

Re:Will we ever fly supersonically over land? by Ericson2314 on Saturday July 03, 2021 @04:07PM (#27724459)
Thank you, and great username for the clarification :).
Re:Will we ever fly supersonically over land? by spodek on Saturday July 03, 2021 @09:10PM (#27726516)
It would mean many people wouldn't choose to live flying distance from their families in the first place and they would go to local events, and people would connect more with local community.
Re:Will we ever fly supersonically over land? by tdeck on Monday July 05, 2021 @04:15AM (#27735662)
The trouble is that we've all organized our lives around fast air travel and it's hard to unring that bell. I might not interviewed at a tech company in SF and then moved out from Pennsylvania if I knew that every journey back to see my parents would take 5 days each way by train. Many of us have close relationships scattered across long distances, which was less true before the advent of affordable air travel.
Re:Will we ever fly supersonically over land? by pyrale on Saturday July 03, 2021 @07:17PM (#27725814)
Yes, and that is not a great prospect.

however, it's going to happen regardless, since this way of living is not sustainable. The only choice that is ours is whether we prefer to anticipate this change and build a decent alternative, or whether we prefer to have it inflicted on us.

Re:Will we ever fly supersonically over land? by Ericson2314 on Saturday July 03, 2021 @04:04PM (#27724438)
Absolutely not. 300 kph HSR rail exists in developed countries.

(2680 miles) / (300 kilometers per hour) = 14.3768064 hours

That's coast to coast in ~ 1/2 day.

Ships and blimps represent a much larger decrease in travel time over airplanes than rail. They perhaps pose a to be solved, but rail doesn't.

Re:Will we ever fly supersonically over land? by sologoub on Saturday July 03, 2021 @07:42PM (#27725958)
You do need favorable terrain for that speed. Much of western US is not exactly flat, so the costs to build this will definitely not be cheap. More likely something slower and a multi-day trip.

I’d still consider a say 48h trip from SoCal to NYC provided I could work over wifi, but otherwise it’s really a nonstarter.

Re:Will we ever fly supersonically over land? by ClumsyPilot on Saturday July 03, 2021 @04:19PM (#27724564)
And you can go ecen faster

>"TGV called V150 holds the record for the highest speed on any national rail system - it hit a whopping 357.2 mph "

Re:Will we ever fly supersonically over land? by LargoLasskhyfv on Sunday July 04, 2021 @07:32PM (#27733470)
Probably not during normal operations. IIRC they put more mechanical tension on the overhead catenary, also more voltage on it, and used slightly larger wheels. That was more of testing the absolute limits of what you can do with that sort of system, materials- and mechanics-wise.
Re:Will we ever fly supersonically over land? by coredog64 on Saturday July 03, 2021 @07:45PM (#27725975)
Don’t look at a geographic district map, look at a topographical map. Or does the solution include a tunnel connecting Eastern Colorado with San Francisco?
Re:Will we ever fly supersonically over land? by cortesoft on Saturday July 03, 2021 @04:42PM (#27724744)
Yeah, but that is only from one part of the coast to one part. You would have to have so many lines to connect all the cities.
Re:Will we ever fly supersonically over land? by Ericson2314 on Saturday July 03, 2021 @06:24PM (#27725440)
Yes, but even if we double the time estimate, I don't think that's prohibitively slow.

Only with the many day duration to traverse oceans eihtou planes do I get worried.

Re:Will we ever fly supersonically over land? by neolog on Saturday July 03, 2021 @04:35PM (#27724687)
Most travel is business. Business events mostly don't require travel as we saw this year.
Re:Will we ever fly supersonically over land? by tonyedgecombe on Sunday July 04, 2021 @02:18AM (#27727621)
And without business travellers many or even most flights wouldn't be financially viable.