It's #WorldBicycleDay and a good time to mention this graph from Scientific American, first published in 1973, and updated 2025.
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It's #WorldBicycleDay and a good time to mention this graph from Scientific American, first published in 1973, and updated 2025.
A person on a bike is the world's most energy-efficient mode of transport, and it's not even close. Salmon use three times as many joules/g/km to get around, and then it's jet aircraft at 5x.
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It's #WorldBicycleDay and a good time to mention this graph from Scientific American, first published in 1973, and updated 2025.
A person on a bike is the world's most energy-efficient mode of transport, and it's not even close. Salmon use three times as many joules/g/km to get around, and then it's jet aircraft at 5x.
And still missing the human on a fully electric bicycle, who would be at least 3 times more efficient than on a normale bicycle.
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And still missing the human on a fully electric bicycle, who would be at least 3 times more efficient than on a normale bicycle.
@KingmaYpe @Two9A Trains and buses missing is also interesting choices.
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@KingmaYpe @Two9A Trains and buses missing is also interesting choices.
@LovesTha @KingmaYpe At least the ebike missing makes sense, if the data's from 1973; the energy efficiency of the average train or bus you'd need to ask SciAm for, as to where it sits on this plot.
I'd _guess_ they'd sit on the far lower right, at the bottom of that vehicular zone, which would still make "human on bike" lower on energy use.
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It's #WorldBicycleDay and a good time to mention this graph from Scientific American, first published in 1973, and updated 2025.
A person on a bike is the world's most energy-efficient mode of transport, and it's not even close. Salmon use three times as many joules/g/km to get around, and then it's jet aircraft at 5x.
@Two9A The chart implies that there are huge-ass fish almost as efficient as human-on-a-bicycle
Apparently, the old adage is wrong:
Some fish might not need bicycles, but other fish might. -
It's #WorldBicycleDay and a good time to mention this graph from Scientific American, first published in 1973, and updated 2025.
A person on a bike is the world's most energy-efficient mode of transport, and it's not even close. Salmon use three times as many joules/g/km to get around, and then it's jet aircraft at 5x.
@Two9A Having had to carry a velomobile down some steps recently, I ask: where did the chart makers get their data from?
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R relay@relay.publicsquare.global shared this topic
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@Two9A Having had to carry a velomobile down some steps recently, I ask: where did the chart makers get their data from?
@dcz Especially being that "velomobile" is slightly lower in weight than "bicycle" leads me to the measurement being of exactly one data point, and that person being relatively lithe.
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It's #WorldBicycleDay and a good time to mention this graph from Scientific American, first published in 1973, and updated 2025.
A person on a bike is the world's most energy-efficient mode of transport, and it's not even close. Salmon use three times as many joules/g/km to get around, and then it's jet aircraft at 5x.
@Two9A missing from graph: horse on bicycle. I'm assuming it would be epic.
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It's #WorldBicycleDay and a good time to mention this graph from Scientific American, first published in 1973, and updated 2025.
A person on a bike is the world's most energy-efficient mode of transport, and it's not even close. Salmon use three times as many joules/g/km to get around, and then it's jet aircraft at 5x.
One side-effect of using a phone keyboard from the 19th century that doesn't auto-correct: typos everywhere in the alt-text. I'll leave them in as a sign of authenticity, I guess.
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And still missing the human on a fully electric bicycle, who would be at least 3 times more efficient than on a normale bicycle.
@KingmaYpe @Two9A
How can that possibly be true? -
@LovesTha @KingmaYpe At least the ebike missing makes sense, if the data's from 1973; the energy efficiency of the average train or bus you'd need to ask SciAm for, as to where it sits on this plot.
I'd _guess_ they'd sit on the far lower right, at the bottom of that vehicular zone, which would still make "human on bike" lower on energy use.
@Two9A @KingmaYpe the cloud of machine points implies they used such data, they just didn't choose to highlight the bus and train.
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@LovesTha @KingmaYpe At least the ebike missing makes sense, if the data's from 1973; the energy efficiency of the average train or bus you'd need to ask SciAm for, as to where it sits on this plot.
I'd _guess_ they'd sit on the far lower right, at the bottom of that vehicular zone, which would still make "human on bike" lower on energy use.
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@KingmaYpe @Two9A Trains and buses missing is also interesting choices.
@LovesTha @KingmaYpe @Two9A
No trains either! -
@KingmaYpe @Two9A
How can that possibly be true?@markhburton @KingmaYpe Mm, it may feel like it's three times more efficient for the human pedalling, but that load's been transferred to the motor I guess.
Definitely on a par for efficiency though.
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@Two9A @KingmaYpe the cloud of machine points implies they used such data, they just didn't choose to highlight the bus and train.
@Two9A @KingmaYpe the first piece of data I can find converts to 0.3 calories per gram per km for freight trains. So probably as efficient as human in velomobile.
Edit: sorry, reading chart badly. 0.3 is worse than the bikes. But still very good
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@Two9A @KingmaYpe the first piece of data I can find converts to 0.3 calories per gram per km for freight trains. So probably as efficient as human in velomobile.
Edit: sorry, reading chart badly. 0.3 is worse than the bikes. But still very good
@Two9A @KingmaYpe but I don't think I trust freight train as only twice as energy efficient as a jet.
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@markhburton @KingmaYpe Mm, it may feel like it's three times more efficient for the human pedalling, but that load's been transferred to the motor I guess.
Definitely on a par for efficiency though.
Muscles are about as efficient as combustion engines.
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It's #WorldBicycleDay and a good time to mention this graph from Scientific American, first published in 1973, and updated 2025.
A person on a bike is the world's most energy-efficient mode of transport, and it's not even close. Salmon use three times as many joules/g/km to get around, and then it's jet aircraft at 5x.
@Two9A When you look at how close to zero it is, it's amazing how much people will spend for a tiny increase in efficiency.
The first person I knew who bought an expensive bike realised that the lock he bought to protect it weighed more than the weight he'd saved by buying expensive tubing.
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@markhburton @KingmaYpe Mm, it may feel like it's three times more efficient for the human pedalling, but that load's been transferred to the motor I guess.
Definitely on a par for efficiency though.
@Two9A @KingmaYpe
You'd have to include at least the energy used in generation, transmission and battery losses, and conversion losses motion to electricity at source, and vice versa at the motor.
That's not taking account of the additional mining, processing, manufacture and distribution of the motor battery, and charger. -
@Two9A @KingmaYpe but I don't think I trust freight train as only twice as energy efficient as a jet.
@LovesTha @KingmaYpe I dunno, the widebodies with the gargantuan turbofans are astonishingly efficient. I found figures for the A330neo as operated by Cebu Pacific (with 459 seats crammed into economy) of 250 tons takeoff weight, 1.75L/100km of Jet-A used per seat; that translates to 0.6 cal/g/km if my sums work out.
