this post was submitted on 03 Nov 2026
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They’re rapidly being converted into generators to meet A.I.’s insatiable demand for electricity. Environmentalists call it a step backward.

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[–] cecilkorik@lemmy.ca 31 points 14 hours ago (3 children)

Since jet fuel is a very similar grade of fuel to diesel, is this where all the diesel is going and why diesel prices are astronomical now? I know the wars are also not helping, but I wouldn't be surprised if this is contributing too.

[–] lorty@lemmy.ml 12 points 11 hours ago

Diesel is expensive because of the war in the middle east. Anything else is a rounding error next to that.

[–] toiletobserver@lemmy.world 16 points 13 hours ago

Contributing, yes. In a meaningful way to prices, no. Both the supply and transportation (boats, routes, pipes) of fuel have been reduced.

[–] giant_smeeg@feddit.uk 9 points 12 hours ago (1 children)

They don't run on jetfuel once converted, either natural gas or diesel. Diesel costs a fortune compared to natural gas in a gas turbine.

I work for a gas turbine OEM and almost exclusively our turbines run on gas with diesel as a backup fuel supply in case of a supply side shortage.

However in this market who knows, they probably can tanker in diesel ASAP rather than waiting for natural gas infrastructure.

[–] LordGimp@fedinsfw.app 4 points 10 hours ago (1 children)

I interviewed for a company working on this project. Their goal is still jet fuel but with greatly increased efficiency by replacing components traditionally driven by the shaft (such as the intake and compressor) with electrically driven systems that in turn take load off of the generator. The net increase in efficiency more than balances out the cost of the electrically driven components, thus increasing the efficiency of the entire system.

Feels like an engineering wet dream, but i was willing to take their money and tell them how smart they sounded lol predictably, the project is waiting on more funding

[–] giant_smeeg@feddit.uk 3 points 10 hours ago

Fair enough. The article says they're being converted to Diesel fuel though.

[–] Statick@feddit.online 6 points 10 hours ago

Guys they're just recycling old jet engines, isn't that what we wanted?! More recycling!

/s

[–] Catoblepas@lemmy.blahaj.zone 16 points 14 hours ago (1 children)

Who doesn’t love hearing jet engines blasting 24/7 in their neighborhood?

[–] thejml@sh.itjust.works 7 points 13 hours ago (2 children)

I lived in a city with an air force base for a while. People had bumper stickers pointing out that they "Love Jet Noise" and that it is the sound of freedom.

[–] frongt@lemmy.zip 10 points 13 hours ago

Giving yourself Alzheimer's to own the libs

[–] atrielienz@lemmy.world 1 points 12 hours ago

The "I love Jet Noise" bumper stickers were the first thing I thought of.

[–] o8bepbua9@lemmy.world 15 points 13 hours ago (4 children)

Wow this can't be efficient. Jet engines are primarily designed to produce thrust. But looks like Musk got special permission from the state to pollute more, so all's good!

[–] Ilovethebomb@sh.itjust.works 4 points 8 hours ago

Not really, the core of a modern turbofan produces rotational energy to drive the fan, the hot part of the engine produces little to no thrust.

[–] frongt@lemmy.zip 13 points 13 hours ago (1 children)

It is. Jet engines are very efficient. But they also have to run high to reach that efficiency. But if you're running at high power for most of the time, like a jet aircraft or datacenter generator, then it makes sense. It doesn't matter whether your turbine shaft is connected to a fan or an electric generator rotor.

[–] o8bepbua9@lemmy.world 1 points 7 hours ago (1 children)

That's true, it's not as bad as I was originally thinking. However, there's probably a reason traditional power plants never use jet engines for power production. According to this article, "But repurposed aircraft turbines tend to be less efficient and more polluting than engines designed for conventional gas-burning plants."

[–] sparkyshocks@lemmy.zip 2 points 7 hours ago

However, there's probably a reason traditional power plants never use jet engines for power production.

They don't use used jet engines, no. But a gas for a gas power plant shares many engineering principles with jet engines, and often many shared parts.

And generally, for stationary plants, the heat of the exhaust can be used to boil steam and get another cycle's worth of work out of the heat, for even greater efficiency.

[–] Nomecks@lemmy.ca 6 points 11 hours ago

This isn't something new. Jet engines have been converted to power use for decades because once they are beyond the aircraft service life they are still useful for generating power

really needs to be killed and all his sons sterilized.

[–] corsicanguppy@lemmy.ca 5 points 13 hours ago (1 children)

to power data centers

To power shitty datacenters built by future defendants, you mean?

[–] thinkingofyouihaveananxietydisorder@quokk.au 1 points 11 hours ago* (last edited 11 hours ago)

defendants? do you mean left appropriation of strange fruit?

[–] determinist@kbin.earth 5 points 13 hours ago (2 children)
[–] silence7@lemmy.world 2 points 10 hours ago* (last edited 10 hours ago) (1 children)

This is what happens when companies are incentivized to turn on data centers fast above any kind of environmental protection or efficiency goal.

[–] determinist@kbin.earth 1 points 9 hours ago

and allowed to, even encouraged. it's just fucking crazy.

[–] jobbies@lemmy.zip 3 points 11 hours ago* (last edited 11 hours ago) (1 children)

For real. Most likely those planes were retired for their inefficiency. Now its totally fine to turn the engines into generators - rather than using clean sources of energy. What are we playing at.

[–] determinist@kbin.earth 2 points 9 hours ago

I can't get my head round all this speed running to destruction.

Top name btw.

[–] MrSulu@lemmy.ml 3 points 13 hours ago

Interesting economic approach to offset the (at least.) $22 billion deficit.

[–] random_character_a@lemmy.world 1 points 13 hours ago

I was just wondering what would be the most expensive question you can ask AI in a free tier.

Lets put those engines to work and have a little more deficit.