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[-] shalafi@lemmy.world 6 points 2 months ago

Had an ex-friend who was a motorhead arguing that electric motors will never beat ICE because they lack comparable torque. Look, I'm no mechanic, but I never got my head around that.

"You mean they don't have enough torque to run a US destroyer?! Someone should call the Navy."

Seriously, if you've played with even a tiny electric motor, provide DC, it goes, instantly. What could he have possibly been trying to say?

[-] kalkulat@lemmy.world 9 points 2 months ago

I think he was trying to admit he doesn't know shit about electric motors.

[-] Nomecks@lemmy.ca 3 points 2 months ago

"EVs lack comparable torque to ICE" - guy in my rearview mirror

[-] Semi_Hemi_Demigod@lemmy.world 3 points 2 months ago

My parents had an original Prius and it was a weedy little car that made those two hippies really happy. If that was his only experience with electric cars I can see why he’d think that.

But the new ones are fucking rockets. I just don’t understand why they need all that. Can they make a cheaper one that’s got 300 horsepower?

[-] MangoCats@feddit.it 1 points 2 months ago

. I just don’t understand why they need all that.

Power sells, they can give that insane 0-60 sprint for very low cost, so it gets people to buy their product instead of a 6 liter V8.

[-] Semi_Hemi_Demigod@lemmy.world 4 points 2 months ago

I guess I’m really lamenting the death of the shitbox econo car.

[-] ayyy@sh.itjust.works 2 points 2 months ago

He was trying to say that he spent too much time in a media bubble disconnected from reality.

[-] solrize@lemmy.ml 3 points 2 months ago

1000 hp = 0.75 MW. If 98% efficient that's 15KW of heat dissipation Sounds like a subsystem bigger than the motor.

[-] kalkulat@lemmy.world 2 points 2 months ago

Yep, I noticed that, you're right. And that's near-miraculous efficiency. The maker's website sez: "YASA also estimates that its all-important continuous power will be in the region of 350kW-400kW (469bhp-536bhp)." It also sez: "To achieve a 750kW short-term peak rating and a density of 59kW/kg ... " Devi'ls in the details ... The image on the 'superblondie' page shows A LOT of cooling built into whatever metal that is: https://supercarblondie.com/wp-content/uploads/YASA-tiny-electric-motor.webp

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[-] M0oP0o@mander.xyz 3 points 2 months ago* (last edited 2 months ago)

Ah good thing the batteries are not the heavy part of the system otherwise this would be awkward.

[-] kbobabob@lemmy.dbzer0.com 2 points 2 months ago

This motor weighs 12.7 kilograms and has 1000hp. How much does a comparable motor weigh?

[-] M0oP0o@mander.xyz 1 points 2 months ago* (last edited 2 months ago)

There is a 1000 hp tesla with 3 motors that all together weights about 450 killograms, this seems to support your idea until you look at how much the batteries weigh...

The batteries are 550 kilograms to start, and are generally considered to not be big enough. So yeah, great they solved the issue that no EV had (EVs always had lighter motors, and very heavy batteries).

Edit: The 1000 hp telsa is 2200 Kg total, so yeah this would cut out 400 ish Kgs (assuming cooling and inverter and all that) from the total, not nothing but not really a game changer ether. Also 1000 Hp engine is stupid and not needed, maybe if it was a 200 Hp version but then also that would be diminishing returns as this motor would be what 4 kgs?

[-] MangoCats@feddit.it 1 points 2 months ago

Put the big battery pack (and maybe an ICE powered generator + fuel) on a trailer for cruising, then have a "ditch trailer and escape" button for that 20 mile sprint at the end of the trip.

[-] Canonical_Warlock@lemmy.dbzer0.com 1 points 2 months ago

Ah, yes. I too enjoy staging my road tripping vehicle like an interplanetary rocket.

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[-] givesomefucks@lemmy.world 2 points 2 months ago

Lol:

The new YASA axial flux motor weighs just 28 pounds, or about the same as a small dog.

However, it delivers a jaw-dropping 750 kilowatts of power, which is the equivalent of 1,005 horsepower.

I feel like we'd need peak horsepower output of a small dog to truly understand this.

[-] thefactremains@lemmy.world 5 points 2 months ago* (last edited 2 months ago)

A dog's power output comes from its muscle mass, which for a healthy dog is about 45% of its total body weight. This gives our 28-pound dog roughly 12.57 lbs (or 5.7 kg) of muscle.

Studies of animal muscle show that the peak power output of vertebrate muscle tissue during a short, explosive burst (like a jump or the start of a sprint) is around 100 to 200 watts per kilogram of muscle.

Now we can estimate the dog's peak power:

  • Low estimate: 5.7 kg of muscle x 100 W/kg = 570 watts
  • High estimate: 5.7 kg of muscle x 200 W/kg = 1140 watts

Converting these figures to horsepower (1 horsepower = 746 watts):

  • Low estimate: 570 W / 746 ≈ 0.76 horsepower
  • High estimate: 1140 W / 746 ≈ 1.5 horsepower

So, a small 28-pound dog might be able to generate a peak power of around 0.75 to 1.5 horsepower for a very brief moment.

So this YASA motor is somewhere between 670 and 1,340 times more powerful than the dog it's being compared to in weight. That's some jaw-dropping power output.

[-] officermike@lemmy.world 2 points 2 months ago

I tried to sanity-test the math here running the same calculations on a 700 kg horse, of which around 50% mass is muscle.

700 kg x 50% = 350 kg

Low:

350 kg x 100 W/kg = 35,000 W

35,000 W / 746 ≈ 47 hp

High:

350 kg x 200 W/kg = 70,000 W

70,000 W / 746 ≈ 94 hp

Despite what the term "horsepower" would seem to suggest, a horse can actually output more than one horsepower. Estimates put peak output of a horse around 12-15 hp. By those numbers, even the low end estimate above is around 3-4x too high. We're gonna need more dogs.

[-] Windex007@lemmy.world 1 points 2 months ago

I appreciate the sanity check, but just to throw a monkey wrench into your model...

I think the square-cube law will bite you here. I expect power/mass isn't constant. Mass grows faster than cross-sectional area which is key in muscle performance.

[-] officermike@lemmy.world 1 points 2 months ago
[-] FaeriesWearBoots@sopuli.xyz 1 points 2 months ago

Might be my favorite thread today. Thank you, polite and nerdy strangers.

[-] AbidanYre@lemmy.world 1 points 2 months ago

We're gonna need more dogs.

I accept your terms.

[-] givesomefucks@lemmy.world 0 points 2 months ago

Stop burning the planet down to generate social media comments about shit you don't understand

[-] thefactremains@lemmy.world 1 points 2 months ago* (last edited 2 months ago)

If I'm not mistaken, you specifically showed an interest in better understanding this.

[-] DasFaultier@sh.itjust.works 2 points 2 months ago

If it's a Corgi, I would estimate the power output at .1 horsepower max. But if it's a small dog the size of a large dog, then that's something entirely different.

[-] floofloof@lemmy.ca 1 points 2 months ago* (last edited 2 months ago)

You can talk horsepower and dogpower all day, but I won't really understand until you convert it to bananapower, for scale.

[-] shortwavesurfer@lemmy.zip 0 points 2 months ago* (last edited 2 months ago)
[-] ceenote@lemmy.world 1 points 2 months ago

Americans will use ANYTHING to avoid metric.

[-] cecilkorik@lemmy.ca 1 points 2 months ago

What if we compromise on fractional thousandths of a kilodog?

[-] SpaceNoodle@lemmy.world 1 points 2 months ago

1/1000 of a kilodog is just a dog bro

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[-] shininghero@pawb.social 1 points 2 months ago* (last edited 2 months ago)

I wonder if we'll ever get enough standardization across EVs so people can start doing the electric equivalent of an LS swap.
I could see this being done on a Slate truck, along with an auxiliary EV battery bolted in the back.

[-] frezik@lemmy.blahaj.zone 1 points 2 months ago

It's more about the batteries than the motor. You can make a motor that sucks down as much power as you want. The battery can't necessarily provide that without damage.

[-] Truscape@lemmy.blahaj.zone 0 points 2 months ago* (last edited 2 months ago)

Hopefully solid-state batteries (once their production manages to ramp up to consumer vehicle scale) could allow for higher capacity and power delivery without the limitations or safety risks of current battery tech.

[-] frezik@lemmy.blahaj.zone 1 points 2 months ago

I mean, I guess. Power output isn't what I'm really hoping for on new battery tech. What we have is perfectly capable of 0-60 times that only thoroughbred performance street cars can meet (like Ariel Atom territory), and the top speed is plenty.

Once you're putting down 500hp, tires start to become a limiting factor. The torque that goes behind that number can stress the limit on all but the largest tires with the stickiest compounds.

Safety, range, and weight reduction of new battery tech are great, though.

[-] SoleInvictus@lemmy.blahaj.zone 1 points 2 months ago* (last edited 2 months ago)

Yep, I have an EV and the way my partner drove it just eats through tires. We're talking about $1.5k, 50k mile warranty tires being replaced at 20-25k because someone liked to pretend they're a fucking astronaut on launch day.

Not bitter.

[-] jjlinux@lemmy.zip 1 points 2 months ago

I also have an EV and tires need changing way faster, for sure. The original tires were replaced only after 2 years, but I just love taking off on that animal, so, I'll be wasting more money on tires.

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[-] HugeNerd@lemmy.ca 1 points 2 months ago

Ah they're rating motors like they used to rate speakers?

https://www.amazon.ca/Mr-Dj-PSE65BT-Portable-Rechargeable/dp/B078BT8DB4

[-] rainy@lemmynsfw.com 1 points 2 months ago

If we put electrified tracks down we could all drive ridiculously overpowered tiny traincars.

[-] Naz@sh.itjust.works 1 points 2 months ago

My eScooter weighs 42 pounds.

A 28 pound motor that's 750 kW?

Holy fuck.

That's power density straight out of science fiction

[-] SatansMaggotyCumFart@piefed.world 1 points 2 months ago

Once I figured out it was an axial flux prototype motor this whole article made sense.

[-] teft@piefed.social 0 points 2 months ago

I'm gonna slap one on my fixie.

[-] Diplomjodler3@lemmy.world 0 points 2 months ago

Having a powerful motor is nice, but you still have to power it.

[-] SoleInvictus@lemmy.blahaj.zone 2 points 2 months ago

Easy! Just make this:

With this:

[-] teft@piefed.social 1 points 2 months ago

I'm gonna slap two on my fixie.

[-] Theoriginalthon@lemmy.world 0 points 2 months ago
[-] TheRealKuni@piefed.social 0 points 2 months ago

Well the metric version is about 1014 PS, but honestly the difference between horsepower and pferdestärke is pretty negligible.

Sadly “745 kW” doesn’t sound as cool as “1000 horsepower.”

[-] Dasus@lemmy.world 1 points 2 months ago

What are you on about? The metric unit for power is the Watt

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this post was submitted on 03 Nov 2025
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