Live data from Hacker News

Tiny electric motor can produce more than 1,000 horsepower

supercarblondie.com

101–110 of 616 posts

Re: Tiny electric motor can produce more than 1,000 horsepower

#101

Earlier quoted context omitted.

Americans do not do metric. Americans can’t even balance a checkbook. Hence the small dog reference for mental “clarity”. We’re dumb. Just look at the news…

I don't think it's fair to insult all US citizens because of your personal shortcomings.

Statistics my man, statistics. I’m not saying there aren’t smart Americans that can grok a 10kg bag, but that the vast majority can not.

Re: Tiny electric motor can produce more than 1,000 horsepower

#103
post #15
post #7

Earlier quoted context omitted.

But EVs are already heavy because of the battery. I suppose percentage-wise the motors don't make much of a difference (?)

The issue with this type of motor is that it is part of the unsprung weight since it is inside the wheel. This is probably why savings here matter a lot more (or at least in a very different way) than the battery weight.

I believe caring about unsprung weight only matters for handling not efficiency

Re: Tiny electric motor can produce more than 1,000 horsepower

#106

Earlier quoted context omitted.

Americans do not do metric. Americans can’t even balance a checkbook. Hence the small dog reference for mental “clarity”. We’re dumb. Just look at the news…

I don't think it's fair to insult all US citizens because of your personal shortcomings.

I think it may be fair? This guy[1] explains how surplus of corporate profits are a mirror image of household/govt debt. Which is a direct transfer of wealth from everyone to the super-super-rich (not the 1%, but the 0.1 - 0.01%)

[1] The chart below shows how this works. The blue line at the top shows the “surplus” of corporations: corporate income minus expenses and net investment. We know this as corporate “free cash flow.” The red line shows combined “surplus” of other sectors: government, households, and foreign trading partners – in excess of their consumption and net investment. It’s negative, so in aggregate, they’re running a deficit. That deficit is the mirror image of the corporate surplus. This isn’t an accident. It’s just accounting (I’ve excluded a few tiny items for clarity): https://www.hussmanfunds.com/comment/mc251028/

Re: Tiny electric motor can produce more than 1,000 horsepower

#107
post #20

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

Not sure about footballs but 28 pounds is about the weight of a child, a bag of rice, or a dumbbell. Hope that helps!

How much rice do you buy at a time?!

Re: Tiny electric motor can produce more than 1,000 horsepower

#109
post #37

Earlier quoted context omitted.

Ok, now I understand why this motor is only used in supercars - installing four (or even only two - according to https://www.mercedes-benz.de/passengercars/technology/concep... , even the AMG GT-XX has "only" three of them) hub motors with twice the power of a Tesla Model 3 in any other car would be ridiculous. So, the actual challenge is to make this motor even smaller while keeping the same power to weight ratio, s…

But why limit only to cars? Can this be used for motorcycles, e-bikes, electric buses, train wheels, e-unicycles, electric golf carts, etc? There are probably a range of application where in-wheel makes perfect sense.

Motorcycles I could imagine.

Do e-bikes really need significantly more power than they have? They already run arguably dangerously fast for their application. Is efficiency not the primary target there?

Re: Tiny electric motor can produce more than 1,000 horsepower

#110
I'm curious as to the efficiency of the motor (basically, how much of the input electric power is converted to motive power).

If it isn't very good, then it might be excellent for drag races, but maybe not so many others.

Also, any power that doesn't turn into torque, is likely to be expressed as heat.

Post reply on HN