LOL, 25 years ago my neighbors and I were setting off fireworks over a yet-undeveloped part of our neighborhood. We saw police pull into the neighborhood. My family were the cowards who went inside. Our neighbors had to pay a fine. If we'd hung around we'd have paid a fine too.
I don't agree. I think it's a choice that each area has made between law enforcement and local governance. Regarding the St. Louis area, it really depends on which jurisdiction you are in. St. Louis County has over 90 municipalities. The neighboring counties are also fragmented but to a lesser degree. There are areas (mostly more rural) where it is legal and loud, some where it's not legal but enforcement is lacking, and there are quiet areas in which I assume enforcement does happen.
The battery is warranted for 8 years or 100,000 miles and you are a simple internet search away from many articles on how long EV batteries are lasting (which is generally quite long).
I have the opposite idea after reading physiology books. The number I remember was 22%, for efficiency of a human being as a motor, driving pedals to create mechanical power. That's quite poor compared to an electric motor. And unless you want your fuel to be high-fructose corn syrup, your fuel is inefficient to make as well.
Do they claim enough reliability and peak power capability to delete the mechanical brakes? I know Brembo is working on electric brakes that would eliminate the hydraulic circuits and pistons. I don't know what they plan to do to make sure the electrical side is as robust as the split-diagonal brake system we've been using for 60 years or so.
> you can integrate all into one hub (breaks, bearings, gears etc) and it weights pretty much the same.
You would get to delete about half the mass of the half-shaft but otherwise you are cramming a lot of stuff into the wheel volume and it all has to survive living out there. Now your HV wiring and any cooling connections to the motor have to flex with the movements of the suspension and probably need guarding against rocks and other road debris. I think all EVs now have the drive electronics tightly coupled to the motors - now that either has to be separated or made compact enough to fit and rugged enough to survive a much higher vibration regime. We do have small amounts of electronics on hub assemblies today (I'm thinking of electronic parking brakes) so there is some precedent but that circuitry is much less challenging than an inverter handling 100s of kW.
>no loss on diff
I doubt there's much loss from differentials in EVs. They don't have the bevel gear of diffs used in longitudinal layout ICE vehicles and mostly the gears in a diff don't move relative to one another (unless you are doing donuts!), so the whole cage mostly acts like a solid gear giving whatever final ratio.
You just described https://en.wikipedia.org/wiki/Whole-tone_scale. Nothing stopping anyone from writing and playing music in such a scale, but it won't help you with nearly all the music you are likely to be familiar with.
>We could be teaching notes to children objectively like how we teach colors, but we're not.
Do you mean trying to teach all children perfect pitch even though society has no expectation of that? Unlike knowing at least your primary colors which is expected of everyone. I suspect that could be unnecessarily stressful for many.
Or do you mean as some kind of metaphor or analogy? If the latter, I think it would be quite confusing as there are aspects of vision and hearing that are quite different. Pitch classes have no analog in vision that I can think of. Color vision is roughly 3 dimensional but sound is not. The aspects of timbre don't map to color.
I think that understanding music theory does require work. It emerges from physics and physiology and a very long history including a bunch of culturally specific things. Did your ancestors make music with long skinny strings or pipes with nice integer-ish overtones? Here are some tuning systems for you (among them the set of C-D-E-F-G-A-B you mentioned). Did they use bells or gongs with decidedly non-integer ratio overtones? Here's a set of different systems for you!
Anyway, if you have a mapping/analog/metaphor you think is useful between music or sound and color I would be interested to hear it / see it!
There are fluid dynamic bearings which were used in VCRs and probably hard drives and definitely laser printer mirror motors - two sets of precise herringbone patterns cut into the ID of a bearing column and a tiny bit of oil that gets entrained between rotor shaft and that bearing column. As the motor speeds up the oil forms pressurized donuts. Only works at speed and generally only useful when there aren't side loads so applications are limited. Rolling element bearings are a quite developed technology and hard to beat in most applications.
It doesn't make that a good idea. Armature losses are proportional to torque squared - doesn't matter if it is radial or axial design. That's why all the EVs today have gear boxes with ratios like 13:1. Get rid of that gearbox and the steady-state losses go up with the square of that ratio. Then there are the issues of sprung mass, and where to put the mechanical brakes.
Yes. If you have a laser printer, that windup sound you hear at the start of a job is the polygon mirror motor spinning up thousands of RPMs - those are PCB stator motors. As were VCR head motors.
I am also curious! A few things I would like to play with but haven't made the time for yet
- real time FFT/spectrogram visualization (I want to play with some spiral things for chord / harmony visualization)
- synth / live coding stuff (like supercollider but in Julia)
I absolutely agree. They shouldn't be able to vote and they shouldn't have free speech rights. Corporations are a legal structure - a way to allow risk sharing to encourage investment that would otherwise maybe not happen if one had to risk everything in order to invest. But when we choose to allow that, and it is a choice, we should not give those entities the rights of people. It is simply absurd.
Is this rich person also voting in the place where they actually live? I'm not against a rich person voting, I just don't want them to get more than one vote. I haven't read the opinion to see if that's addressed.