Boeing quietly pulls plug on the 747, closing era of jumbo jets
bloomberg.com
bloomberg.com
This is imply not true. The last 747s built are freighters. Freight demand is at an all time high due to COVID and constraints on supply chians. Even passenger vehicles are being called into freight service (which is far less efficient yet still economical).
They certainly aren't doing this and making a loss: they're hemorrhaging enough money already that they wouldn't want to add to that, but when the marginal cost is essentially the landing fees minus the parking fees they'd otherwise be paying, plus the additional cost of paying the crew above and beyond any furlough payment, plus the cost of fuel, plus any marginal maintenance cost from the extra cycles.
Here's another piece with flexport: https://techcrunch.com/2020/04/26/ryan-petersen-flexport/ (scroll down and you have an image of packages strapped in a commercial plane)
If I recall it is only profitable on shorter routes.
Certainly into and out of Australia at the moment we are seeing significant surcharges from DHL.
A summary of the video:
- Passenger flight belly cargo used to be responsible for 25% of air cargo capacity, so capacity is severely reduced.
- PPE emergency logistics has caused a huge spike in demand, since PPE allocations are currently too volatile for anything except for air cargo. Air cargo prices are high.
- Government funding for airlines require pilots to remain on salary, so there's no additional marginal cost of labor.
- The biggest marginal cost of a flight, the cost of fuel, has understandably also become very cheap.
The end result is that even though it's still quite inefficient as compared to dedicated freight planes, the perfect storm of circumstances makes passenger-planes-as-cargo-planes momentarily profitable.
the cost of fuel, has understandably also become very cheap
Apparently, jet fuel was down around 40 cents a gallon. Kerosene, basically the same stuff, was never anywhere near that. Pretty strange.
That said, since many airlines have completely stopped flying some plane types (particulary the A380 superjumbo), those pilots are going to have a problem soon.
That's not the usual definition of "profitable". As you say, they're turning a gross profit (if we treat aircraft leasing costs etc. as fixed, which over a short timeframe they are), but it's not enough to cover their fixed costs, so grandparent is correct that they are not (net) profitable.
I think this is in the same category of decision as retailers selling old stock at a loss, because that's better than not selling it.
A large portion of the modern economy is run by spreadsheets, and crunching the numbers on what the "most-profitable" thing to do often leads to companies doing what seems insane to the average person. P.S.: only the first 2/3rds of that was directed at your comment specifically.
In the long run, you can't ignore the fixed costs forever and you eventually just leave the market altogether.
Will only be lightweight cargo though
https://simpleflying.com/british-airways-boeing-777-freight/
In normal times they'd often fly holiday makers in the morning, and freight in the afternoon - takes 45mins to change over
Here's one with the cargo door open but the seats in https://www.airliners.net/photo/Flyglobespan-Jet2/Boeing-737...
There's a video showing the change over on YT somewhere
Even if airlines predict the global transport market to remain similar for years, that makes it much more practical and affordable to convert existing passenger aircraft stock [which happens anyway, but we've got more and more modern parked or underutilised airframes right now]
The "Queen of the skies" really changed air travel, and I'm a bit sad that they won't be flying much longer. The economics, size and scale of travel were drastically different before the 747. Before the 747, only the richest folks could really cross the globe at will. The 747 changed everyday notions of distance and ushered in the age of travel that we get to enjoy today. This plane shrank the world and allowed for the middle class to explore the world in a way that they never could before.
When my parents came to the US, they came on a 747. Before the 747 they probably would have had to make 5-6 stops, instead of the 2 that they came on.
Crazy enough, the 747 was designed with obsolescence in mind because when it was developed in the 60's, we thought all passenger jets would be flying supersonic... so they made the 747 with this hump to easily convert them into cargo jets (cargo would continue to fly subsonic even though passengers wouldn't).
I also had the pleasure of visiting the C17 plant in Long Beach. Blew. My. Mind.
I think my first and only time on an A380 might be comparable. It was huge! And so spacious, and so quiet. (Lufthansa.)
Not just that though. Regulation also changed significantly in the meantime and made it possible for smaller aircrafts to fly intercontinental which brought prices down as well.
Years later, when I worked for Boeing, the older fellows told me that the 747 lost money for years. But when it turned profitable, boy was it profitable. Whenever Boeing sold one, it was huge dump truck of cash infused into the company.
Sad to see it end.
I wonder why all airlines do not put their 1st class there (Lufthansa for instance is business on the upper deck, while IIRC Thai is first)
and as points of interest, the hump on the 747 keeps the cockpit out of the way allowing freight to be loaded more easily and completely, and freighters don't mind stopping to refuel (too expensive to carry all that fuel for the whole trip) and that's what makes the 747 continue to make economic sense for freight, while the A380 never did.
I believe I read that the dead weight issue would not have been as important if freighters didn't stop for refueling because of A380's range; that's why I brought up the stopping.
That is, you'd fill up it's max weight limit way before filling the empty volume inside the plane with most normal cargo.
The freight economics issue between the 747F and the A380F is related to the complex soup of fixed costs and variable costs that go into the carrier's choice of platform; in addition to the fuel, the carrier has to amortize the purchase price, and the A380F with newer technology is a much more expensive platform to the freight carriers.
Because the 747 is so old, most of the development costs are long since amortized. This gives Boeing more pricing flexibility if the two companies are competing head to head. The A380 otoh needed to earn back lot of money to get back to breakeven for Airbus, so Airbus did not have the same pricing flexibility as Boeing. It was in the interest of the freight carriers to be able to play the two companies off against one another on price, but it was in Boeing's interest to kill the A380F so they wouldn't need to compete with it.
And on Airbus's side, the A380F was also "competing" with the passenger A380 for slots on assembly line; since the passenger version paid a premium for the longer range capability that the freighter could not command (because freighters stop to refuel anyway) it didn't make sense in the short run for Airbus to compete in the freighter space. And as it turns out, there was no longer term for the platform as a whole, especially considering it didn't actually have cost advantages as a freighter anyway.
How does that work, given that development costs are a sunk cost[1]? The accountants shouldn't care. If it's necessary to compete, the development costs should no longer matter.
However, if a company borrowed the money it "sunk", it still has to pay that money back from future sales; if it was raised through equity, continued losses will continue to drag the share price down. Sunk cost is not a free lunch argument.
This is where the "competing for production slots" with passenger variants comes in. The program could only be run cash flow positive at a higher rate of production than the orders were justifying, and that is on the back of the higher priced passenger variants. As it was, Airbus needed to amortize overhead costs over two production lines, the overhead was too much for one production line; worth it in the short term only if you expected sales to pick up in the future. (and you can't shut down a production line and then fire it back up without a lot of extra overhead, so for example, they can't just keep the A380 idea around in case demand develops)
For each piece of the program, there are separate sunk costs. The sunk cost of design does not justify sinking further funds into building an assembly line, if the expected production is not going to pay for itself, even though the design you now paid for is so to speak "free!" And the freighter variant required new sunk costs before it would be ready to sell (the 747-8 itself cost $5B more on top of the already existing 747 platform)
And anything Airbus chose to do, Boeing could disrupt by dropping it's prices/profits; there is a lot of "chess" entailed in marketing these large scale projects. Would have potentially been a different story had there not been competition.
Even if a company has borrowed the money it "sunk", it's still in its interest to maximize revenue even if that's not enough to pay the interest on that loan. The alternative would to make even less, and cause its debts to rise even further.
Maximizing revenue means charging the most the market will pay. Not participating because the market won't pay enough to "pay back on the initial investment" would not be maximizing revenue. Not participating because doing so would mean operating at a loss _excluding the sunk cost_ makes sense, but that's not what we're discussing here.
> The sunk cost of design does not justify sinking further funds into building an assembly line, if the expected production is not going to pay for itself, even though the design you now paid for is so to speak "free!"
The cost of building or operating an assembly line was not the subject of my comment. I was only referring to your comment about Boeing's development costs being "already amortized". That part makes no difference to the economics of the situation.
A competitor who has already paid down their investment has more flexibility than you do because they have more room to play with price and still report a profit.
The sunk cost fallacy refers to your decision making. What is the value of a project? its prospects, not what you have already spent. What has your spending done? It's bought you the option to make this decision. Do you call the option? Well, it doesn't matter how much you paid for it. Did you make money on the option? That does matter how much the option cost.
Some of it's psychological and perhaps not rational: if you have engaged in a big money losing project, if you pull the plug on it, your stock price will go up, because the market says "whew, at least we know they are not going spend money on that project any more" which I guess is them suspecting you will fall prey to the sunk cost fallacy. But these are complex decisions to make, especially in Europe where shutting down production entails a lot of costs that would be better put to something productive, and as you don't know the future, you try to figure out ways to make the project work.
EDIT: Specifically pressurization cycles and metal fatigue, since that's how aircraft lifespan is measured.
They were loaded into a flight I was on from Costa Rica to Paris.
Regardless, fuel burn is certainly a factor to consider when looking at savings and there are interesting studies on it (See “Fuel burn implications“ for an idea of factors [1])
[0] http://large.stanford.edu/courses/2013/ph240/eller1/ [1] https://www.purdue.edu/discoverypark/nextrans/assets/pdfs/08...
If you make one really long flight, you need more fuel - and then you need more fuel to carry that fuel (though less). Basically you need an exponential amount of fuel for more range, not linear. (It works just the same as the rocket equation, though less drastic.)
But landing and takeoff take kind of a fixed amount of fuel.
So, for short trips, the fixed amount is more - so better to fly directly.
But for really long trips, you're on the right side, the steep end of the exponential curve. Adding more range there takes a lot more fuel. So then it's smarter to put less fuel at start and make a refueling stop instead.
Fuel burn is also usually the largest component of expenditure, and is especially likely to be when looking at elderly freighters with low capital costs and relatively inefficient engines
That way you don’t overburdened the ground airport system. And eventually, the refueling airplane can become robotic, and fly fully automated also.
And cargo planes fly far fewer hours each day than passenger planes, leading to fewer movements per plane. OTOH the fact that the MD-10/MD-11 has a second life in cargo also is evidence that fuel burn isn’t the primary concern. And that’s cheaper than ever now, while being the primary operational cost.
And weight (and thus fuel burn) is only one constraint, the other is volume.
Anyway, this whole thing goes away by just adding a runway in Anchorage at most assuming anything like current demand.
And especially after the still unresolved 737MAX saga there is very little appetite in commercial aviation towards increased aviation. We’re down to two people, that’s enough.
Also, if you can make the tanker bird a UAV, you can do the exact same with the original cargo plane anyway.
The risk to humans in automated flight is mainly in takeoff and landing. I can readily imagine making safe UAV tanker drones which take off and land on airstrips far from human habitation, such that the occasional mistake, while expensive, costs no human life.
What I can't imagine is the economics of this ever working out.
The A-350ULR has a range of a bit more than 11,000 miles [1].
Basically, probably some time in the next decade or so we will break through that barrier and be able to connect any two airports on Earth nonstop if we wanted to. Whether it is economical to do so is another question.
[0] http://www.gcmap.com/mapui?DU=mi&P=AGP-AKL
[1] https://www.flightglobal.com/a350-900ulr-range-figure-not-a-...
I presume if someone really wants to rush and order a few more the run would be continued slightly, but this is unlikely...
> While Boeing’s hump-nosed freighters will live on, the fast-disappearing A380 risks going down as an epic dud.
that way, but it's referring to A380 flights largely stopping but that the 747 freighter variants will be flying for a long time. But, the article (and other sources) are clear that production of 747-- including 747-8F-- is stopping. Explicitly explained later:
> Boeing’s jumbo freighters will continue to ply the skies for decades after production stops, said Aboulafia.
..
> “At a build rate of half an airplane per month, the 747-8 program has more than two years of production ahead of it in order to fulfill our current customer commitments. We will continue to make the right decisions to keep the production line healthy and meet customer needs,” Boeing said for this story.
> The planemaker has just 15 unfilled orders for the 747 -- all freighters. A dozen of them are headed to United Parcel Service Inc., and the fate of the rest is unclear, part of a dispute with Russia’s Volga-Dnepr Group.
oh, one more thing: in terms of passenger versions, there are two Air Force One's on order, aren't there? yeah yeah, I know, it's not AF1 if the president's not on it.
Yes. They bought undelivered 747-8Is that had already been built (the airline had gone bankrupt prior to delivery) and they are currently modifying the aircraft for presidential service.
Though I'm not sure Boeing really would take your order, given that the 747 line is running at a loss.
https://assets.bwbx.io/images/users/iqjWHBFdfxIU/ijEVXdL5LsC...
What's the biggest difference? No overhead bins! It looks positively roomy in there.
I wonder if the overhead bin model is really the best one -- it feels like a huge bottleneck. Reduces headspace, slows down load in and load out dramatically since it essentially requires that every passenger be able to military press a 20lb+ weight (or have someone else do it).
I'm not sure what a better plan would be though :) Maybe raise the cabin slightly and have the bins be built into the floors below each seat?
Over the years, the airlines _have_ reduced seat pitch, and as you can see from the 747 illustration, added an additional seat in the middle section as well.
I don't see any 3-5-3s - everyone was a 3-4-3. If anyone was doing it, they've since retired the plane/layout.
Now, at least in short-medium range Airbus, my sore ass really believe that more than the pitch has been reduced ! ;-)
Flying on the jumbo jets was always a trip. With Boeing pulling the plug on the 747, it will be long time before anyone makes a double decker again, if ever.
The next flight was from LAX to MEL and it was completely full. I never thought we were going to get into the air.
1) The variability of traffic leads to jumbos being underutilized, wasting fuel and capital tied up in such oversized planes, when it's better to have a 787 in use full time more consistently
2) Airlines got tired of having to maintain 4 engines when they could just have 2...
There is a reason the largest operators of A380s and 747s are the ones with absolutely massive hubs; either a legacy European flag carrier, a Middle Eastern mega-hub airline, or an airline handling large amounts of transfer volume from an out-of-the-way place like Australia.
Going to miss the variety they provided at the airport.
Airbus thought people wanted to fly from a small airport to a central airport, to transfer to a A380, then fly to the other side of the world, then transfer to a smaller plane to get to their final airport.
Thus, your trip ended up becoming 3 possible transfers!
This is insane that I can’t imagine why the designers didn’t think this through.
And airports had to upgrade their facilities in order to handle the increased weight of the jumbo A380. This was a non-starter to begin with.
Boeing correctly realized that people want a direct point-to-point travel, with no transfers in between. Thus, they won out in the next generation airplanes.
But, whatever happened to those Dreamliners anyways? I don’t hear much about them anymore.
They're still being made, they work great, etc. The biggest issue for Boeing is that they've hit really steep production costs on them. The idea is that the first planes start out really expensive to make, but you refine your methods as you continue manufacturing them, and eventually break even and start making a profit on each plane sometime in the future. It's taken Boeing much, much longer than expected to start making money on them.
It works well for Emirates, Etihad, Turkish etc. - they fly from everywhere to Dubai, Abu Dhabi, Istanbul resp., and depending on the traffic in big or small planes. So you basically get anywhere with 2 hops.
most airlines use a combination of both models, but the hub and spoke model is more economical for the airline (apart from providing benefits for the customer). What does your data indicate?
If you can get a flight on the 747, I urge you if you are able to, pay the extra and get a seat on the upper deck. It will be one of those things you talk about for years.
The A380 was a boondoggle from the beginning, an attempt to outdo Boeing by having TEH BIGGEREST aircraft on the market. Having to rebuild airports to accommodate it wasn't a good idea.
The 747 is a 1960s design, for Pete's sake. How long were we planning on keeping it around?
The major issue with the jumbo planes' (passenger) variants is that twin-engines now have significantly increased range, and have half the fuel consumption to boot. It's a lot easier to sell premium direct tickets rather than convince people to transfer onto a large cattle-class jumbo jet. Even pre-point to point, actually filling up a jumbo jet could be quite difficult, so now the death knell has been a long time coming, unless you're a Middle Eastern carrier operating the super-long-haul hub model.
Cost per flying hour of a modern B52: $70,000 [1]
1. https://www.airforcemag.com/article/re-engining-the-b-52/
> "Also nobody should be sorry that elites have to sit on long overseas flights just like we do."
Anyone can fly as long as they can pay for the ticket. First-class passengers subsidize economy seats for most flights, and new tech generally starts with wealthier early-adopters before it becomes accessible for everyone.
By the way, if you live in the West then you're an "elite" compared to billions. Let's drop the classism.
I also got to do a walk through in the Air and Space Museum over a decade ago. It's deinitely a tight space amd the seats were tiny. I'm not terribly tall, about 6 feet, and I had to hunch over to avoid hitting my head.
Or we could all be flying supersonic because of the economies of scale.
Sometimes old designs are pretty good. The C-130 Hercules rolled out in 1956. It's still in service in the US and other air forces. [1]
And it's cool that Boeing figured out 20 yrs ago that point-to-point would kill hub-and-spoke (not least because it's a great way to fly) and very sad that Airbus wasted so much money and people's careers on an ego driven white elephant that Boeing already told them wasn't going to work, instead of using that money to push the real envelope.
Air France has stopped flying the A380 [2].
[0] Airbus announces stopping production of A380 in 2021: https://www.capital.fr/entreprises-marches/airbus-annonce-la...
[1] Coronavirus gives the final blow to the A380 https://www.lefigaro.fr/flash-eco/le-coronavirus-donne-le-co...
[2] Air France flies the A380 for the last time https://www.lefigaro.fr/societes/air-france-fait-voler-l-a38...
With COVID-19 and an expecting reduction in travel lasting a number of years, all airlines are downsizing. An aircraft that's already marginal makes a lot of sense to drop, even it means letting it go while young. They're effectively getting replaced by the A350-900s Air France has on order which are _vastly_ more fuel efficient per passenger.
(I've flown once on an A350. Very nice plane)
The engines on the A380 aren't actually that modern with the two options being 15-20 year old designs. One of the reasons it was discontinued is that no engine manufacturer was willing to make new engines for it, so they weren't able to produce a modern fuel efficient variant.
And it also makes limited use of composites in its design, so it's heavier than it would be if designed today.
One can make a good case for turbine engines having better efficiency the larger they are (less losses due to boundary layer friction etc.), so yes, if you have two otherwise equivalent aircraft I'd assume fewer bigger engines would be better. But here we don't have equivalent aircraft, as the A380 is bigger than, well, pretty much any other passenger airliner out there.
The A380 engines produce around 350 kN, which is slightly bigger than, say, the B787 engines. Admittedly the A350 engines are a bit bigger than that, but not by a huge amount. But the data seems to suggest both the 787 and 350 are much more fuel efficient than the A380?
So to make an equivalent comparison, one would take an engine, make a twin engine plane and a quad engine plane with that exact same engine. Naively one could expect the quad version to take twice the number of passengers or cargo, and have roughly the same fuel economy/seat. If not, why not? Which scaling laws are non-linear here?
> The engines on the A380 aren't actually that modern with the two options being 15-20 year old designs. One of the reasons it was discontinued is that no engine manufacturer was willing to make new engines for it, so they weren't able to produce a modern fuel efficient variant.
> And it also makes limited use of composites in its design, so it's heavier than it would be if designed today.
This explanation I can certainly buy. Also that the biggest turbofans are nowadays so large that a twin engine plane is already so big there's a very small market for quads.
It's worthwhile looking at where Airbus proposed to improve the A380:
* Densifying the main deck (going to 11-across in economy, still with 18" wide seats). This _alone_ in a typical configuration gives a 9% fuel-per-passenger gain.
* They looked at new engines (derived from the A350, for example) which would provide a 5% fuel burn gain.
* Minor wing modifications (new winglets and slightly reduced wing twist) which would provide a 4% fuel burn gain.
* Longer maintenance intervals (so the aircraft spends more time in the air earning money rather).
Other differences include that it holds much less freight in its belly than a 777 (a much larger proportion of its hold is consumed with passenger luggage), so you lose freight revenue.
It's also worthwhile pointing out that engines are some of the most expensive parts to maintain on an aircraft, so by doubling the number of engines on an aircraft you make a very significant increase on maintenance costs.
At the same time, you have the 777X lengthening the 777 (and increasing capacity) while reducing fuel-burn per seat, a much more versatile aircraft (an A380 will never be profitable on the major of 777X routes!), and more fleet commonality.
Doesn't one of the Middle Eastern airlines (Emirates?) have good routes for it, so they can still use it heavily?
According to the Figaro article, 8 of their 125 planes are still to be delivered. Maybe they could turn a profit by gaining a bigger share on their routes from other companies?
Losing Concorde was unfortunate, but there were just too many limitations to make it viable. Flying supersonic means you produce a shockwave that breaks stuff on the ground, limiting it to flying supersonic over oceans. Flying supersonic means that you have to produce kinetic energy that goes up like the square of your speed, meaning you need more fuel, and you need more fuel to carry the fuel. It barely worked for JFK-LHR (relatively short distance, mostly over the ocean), and there just weren't other routes where it was viable. With no viable routes, it wasn't going to sell in any volume, and there is some critical amount of volume you need to justify the program (some fixed human overhead for every airframe project; if you sell 10000 of them, that rounds to zero, if you sell only 20 of them, that rounds to a lot).
Might be pessimistic but I don't think we'll ever see a supersonic airliner again. The sonic boom kills them. Those people that want to drill tunnels through the earth to get better-than-great-circle distances might be the future. But I'll probably be dead before anyone gets funding to do that.
Might also get a little warm and you'd fight a lot of pressure, since you'd need to dig down about 1/3rd of the distance you'd want to save (assuming my elementary geometry memories aren't failing me). So to save 600km distance, you'd have to go down to a max depth of almost 200km. For context, the deepest bore hole drilled to date seems to be about 12km deep. [0]
So technology would have to improve a lot before global warming or the next meteor get us all.
https://www.ns.nl/binaries/_ht_1533730717772/content/assets/...
Besides a 777 is not that much smaller than a 747.
[1] https://en.wikipedia.org/wiki/Fuel_economy_in_aircraft#Short...
[2] https://www.reuters.com/article/us-epa-emissions-autos/u-s-a...
What's the next version going to be then?
In 30 years the President may hop around in a custom SpaceX Starship.
This would be really cool, but it wouldn't work for the "last mile". It's too loud and obnoxious to land in cities.
Maybe if they could modify it to deploy Marine 1 mid-air, but to me that sounds a lot like stranding the president wherever you dropped him off and an necessarily high risk maneuver.
Maybe the president gets an ICBM-Force One in the future, but I bet they also keep an Air Force One equivalent around too.
They may look at a military conversion if there isn't a civilian airliner available.
I guess the one case where 4 engines might be useful is if somebody sneaks up with an IR-guided manpad near an airport. Such a small missile might just take out an engine without breaking up the entire plane.
Then again, in a war if you're operating AF1 anywhere close where hostile missiles are a concern, you're doing something wrong.
She trained for the -8F series upgrade at Anchorage. [Via @ethagknight comment](https://news.ycombinator.com/item?id=23718445) I learned that this is Ted Stevens Airport, a refueling stop for everybody doing air freight from Shenzhen to USA. Apparently they have lots of other operations there, makes sense.
Anyway, 787-F pilots have had a very busy year.
https://en.wikipedia.org/wiki/Boeing_777#Accidents_and_incid...
So you'd need to look at cases where independent failures cause both engines on a twin engine plane to fail. I'd guess those are quite rare.
But the 747 was good enough and collectively we really didn't need to go supersonic or into orbit (or at least, most of the world couldn't afford it)
The article makes the pivot that web technology is no different -- that there might not be a supersonic quantum AI coming down the pipeline, that the tech we have now might be pretty much as good as it gets. Makes me feel less guilty about wanting to use old reliable tools and not follow the hype around smart contracts and adversarial agents. A relational database with some CGI scripts is going to be just as useful in 100 years as it is today.
[0] https://idlewords.com/talks/web_design_first_100_years.htm
That hump isn't just physically ugly, it's socially ugly as well. It is where the elites congregate. Anything that diminishes their status relative to our own is a good thing.
(The lounge dates to before business class existed. That said, modern international business class is more comfortable in most ways than first class was at the time.)
??? Surely you mean the A380 there! :-)
The classics have mostly or entirely been retired, with the most common models being the -700 and -800. The family has enough flexibility to evolve in range without needing a completely new family. The 737 still has its place as the short to medium haul work horse, so I don't see it going anywhere for a long time.
There are huge demand for A321LR precisely because there is a need for 757-like capacity and range. Granted, when 757 was discontinued the demand wasn't there yet.
Note that Boeing was trying to sell airlines on a clean-sheet aircraft when Airbus launched the A320neo, and _quickly_ started gaining customers, including those that had been loyal to Boeing for decades. Boeing needed something to counter the A320neo, hence the MAX had to happen—and soon.
Aviation regulations are often written in blood, and while the MAX is obviously not in a great place, it's not necessarily doomed forever. Nobody thinks twice about the batteries on a 787 anymore, or the pylon assemblies on the DC10.
I can't imagine anybody flying on a 737 Max even if the Boeing execs over at the FAA claim it's safe again.
Regardless of the plane size however, there's no getting around planes depositing pollution in the upper atmosphere is worse than we thought and cannot be thought of in the same way as emissions from a train or power plant: https://www.newscientist.com/article/2207886-it-turns-out-pl...