431–440 of 616 posts
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!
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One of my fundamental criticisms of Elon musk performance as a CEO. The vast stock market price and valuation should enable these sorts of transactions. It would enable Tesla to diversify operations move into applying its technology on a mass-market basis to hybrids without "damaging" the "purity" of the Tesla brand. It would enable more marques to target specific economic bands, international markets, etc. But no we…
Elon Musk has completely lost interest in being CEO of a car company. Tesla is a whatever's-on-his-mind-today company.
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Not a game changer but I wonder if ligher motors allow you to do things like have one motor per drive wheel, removing the need for differential gearboxes? Then you can do clever things with traction control without having to use the ABS system to brake the drive wheels. Or dramatically change the turning circle on big cars and vans. Maybe even reduce the size and weight of the braking system by taking on some of that…
Putting the motors in the wheel is bad for a separate reason: Unsprung weight. Every ounce you have in the hubs that don't float on the suspension reduces certain suspension attributes. You end up with a crappier ride and poor performance.
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Not really... https://www.reddit.com/r/AskAmericans/comments/184oag8/can_y... That assertion seems to be a disconnect of language. But - Selling firearms in Wal-Mart is bad enough, but it does tend to be more rural Wal-Marts than suburban (and not at all urban). Said firearms are under lock and key in the same way they would be at gun stores. There are many gun shops in the same areas where Wal-Mart sells firearms. A…
We have everything locked up too just as you describe. We just have a lot of places to buy them, it's not like Wal-Mart here has a bin in the middle of the isle full of AR's next to the bin of Pokemon stuffies. Only pellet and BB guns are found on the shelf.
I don't know why I'm being pedantic, guns here are insane for many reasons but not because of this one. What bothers me is once you do buy it, you can just carry it anywhere you want now. Like random guys in MAGA hats holding what looks like a machine gun on a street corner is no longer an unusual sighting. It's weird, when I was a kid, my dad had rifles mounted to his truck rear window and it was common. Then, there was what seemed like a zero tolerance decade or two when guns were only on the news (gang violence) or in a gun safe (for hunting only). Then the pendulum swung to the wacky side of guns everywhere.
My kids school recently hosted a "gun recycling day" recently, with good intentions I think, but obviously once it occurred the parents were riled up with "you seriously invited people to bring their guns to the school! Where are the guns? Did they get moved off campus? etc" It's technically a private school and the event was hosted by the affiliated church, but still, pretty tone deaf to have that kind of event on the same property as a couple hundred elementary students
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There’s no area in the world that allows e-bikes with more than 750w motors. A 3kw motor is illegal (cf Surron), unless you are talking about an e-moped requiring registration.
They are not allowed, but still commonly owned and used. The law needs to catch up. There are clearly good reasons for people to want extremely powerful e-bikes and they should be allowed to. They can't be treated like bicycles because they're too fast but aren't nearly as dangerous as motorcycles. We need a new category for light motorcycles. The real problem, IMO, is that the law is generally not deferential enough…
Why would an extremely powerful ebike be any less dangerous than extremely powerful gas motorcycle?
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I see kids blasting around at high speeds without helmets. Kids treat them like fast bikes you do not have to pedal. Wiping out on a bike at 13mph is a very different proposition to wiping out on a bike at higher speeds. I saw just a couple nights ago some kid doing what appeared to be about 40mph on an eBike. Wind in his hair, not pedaling, just blasting it. I am sure new regulations will come to speed limit them, b…
On a decent hill you can get a regular bike going >60mph. A dirt bike will let you ride off road at nice speeds over random terrain (no licensing required when not on public roads). In the realm of bikes, these are not an outlier. Limiters are easily overcome and speed limits are barely enforced on cars, let alone bikes. When you get a bike like this you deal with the danger and wear protective gear just like you wou…
This is not the same as being able to go > 60 mph anywhere, at any time, simply by pressing a button.
> When you get a bike like this you deal with the danger and wear protective gear just like you would with any other bike (motorized or not).
This only deals with the danger to the rider - it doesn't address the danger to pedestrians.
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Does this motor design scale down? It's not clear from the article - the article focuses more on the relative efficiency gains over the previous model. A 30lb 1000hp motor doesn't necessarily mean that they can also produce a 3lb, 100hp motor. It would be cool if it did, but I doubt that it does because usually component strength doesn't scale linearly. That being said, these are still valuable for traditional EVs. E…
I'm more fascinated by the question of whether it scales up... imagine much smaller and more efficient electric engines for cruise liners and cargo ships.
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What do you mean? Modern LFP cells have quite high power density. LTO is even higher. An e-bike with a 100Wh battery and a 300W motor would be extremely useful if it were light enough: you could carry it up stairs, onto trains, etc easily, and it would give plenty of boost to navigate traffic for short distances and make it easier to go up hills. The idea would be that most of the energy would come from the rider. 10…
I'm super excited to fly an electric plane, but a lightweight motor isn't what's gonna make that possible. My current plane carries 561 kwh of energy in a 100 pound/ 17gal gas tank. Even if you say the engine is only 30% efficient, I am still carrying an absolute shitload of energy compared to what I could get out of 100 lbs of lithium batteries. The actual motor only weighs 84 lbs. So I have a weight budget of 184 l…
> Hybrid aircraft? What if there was a battery large enough for takeoff and landing, a small motor (or pair for redundancy) for cruising and to recharge the battery, and motors and fans or propellers wherever is best from an aerodynamic perspective.
Would this be better than a conventional design? I don’t know, but availability of very high power-to-weight motors would help.
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There’s no area in the world that allows e-bikes with more than 750w motors. A 3kw motor is illegal (cf Surron), unless you are talking about an e-moped requiring registration.
They are not allowed, but still commonly owned and used. The law needs to catch up. There are clearly good reasons for people to want extremely powerful e-bikes and they should be allowed to. They can't be treated like bicycles because they're too fast but aren't nearly as dangerous as motorcycles. We need a new category for light motorcycles. The real problem, IMO, is that the law is generally not deferential enough…
The real solution people don't want to accept is that ALL non arterial roads in ANY urban/suburban/rural environment should be limited to 30kpmh (and equivalent in NA). And by limited I mean traffic calmed: 1 lane per direction, narrow lanes, raised street crossing, raised intersections, European style roundabouts, the works (Dutch style) - so that people actually respect the speed limit because they don't want to bang their car.
Once that happens, bike stay in bike lanes (or multi use paths with pedestrians) and everything else can go on the regular non arterial roads and stuff that's registered (mopeds and up) and go on any road.
But my "solution" requires major political adoption and probably decades of sustained vision in investment. In places with good governance it will happen naturally and everywhere else will slowly be left behind.
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No wonder electrics don't sell well in the US. People weigh more, you're basically saying that leaving grandma at home, is a "game changer".
True! If only grandma wouldn't insist on bringing 250kg of weapons and ammunition with her everywhere I'd get much better range in my EV, but alas this is the USA.