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| ▲ | Aurornis 3 days ago | parent [-] | | That’s a drive unit, which is more than the motor. Read the description: > This kit includes the Tesla motor, inverter, gear box, power cables and drive shafts. Drive shafts, gearbox, power cables, inverter. Also includes the mounts, which is likely not factored into the lab calculations for this marketing material. You cannot drop 150lbs from the Model 3 motor because it doesn’t even weigh 150lbs. | | |
| ▲ | catapart 3 days ago | parent | next [-] | | You're missing the forest for the trees. Dropping 10 lbs per motor is HUGE. Dropping 30 is amazing. Whatever is dropped, it's significant. Pretend that it isn't all you want, but anyone doing production work knows how important this is. I'm happy to compare apples to apples when we can do that, and if you want me to say I was wrong about the Tesla motor size I'm happy to say that I was just going by what was available on the internet and skipped the details. But I did so in service of a point which you still haven't actually engaged with beyond "Nu uh!". | | |
| ▲ | Aurornis 3 days ago | parent [-] | | > Dropping 10 lbs per motor is HUGE. Auto makers could drop 10lbs, 100lbs or even more from every EV right now by choosing more expensive materials, more expensive manufacturing processes, or simply cutting back on amenities. 10lbs is not significant in the grand scheme of things. The real question is how much it costs, what are the tradeoffs, and how practical is it. > But I did so in service of a point which you still haven't actually engaged with beyond "Nu uh!". That’s not a fair take on what I’ve been posting at all. I said every little bit helps, but pointed out that motor sizes are already small.l | | |
| ▲ | 3 days ago | parent | next [-] | | [deleted] | |
| ▲ | catapart 3 days ago | parent | prev [-] | | 10 lbs per motor in an aircraft is huge. And the fact that they can do it WITHOUT having to use more expensive materials or manufacturing or amenities is the thing that is huge about it. It's a fair take on your responses because talking about a SINGLE motor is missing the point. You're not engaging with the actual point that OP made, you're trying to dispute OP by engaging in your own point about what difference this would make in single-motor cars, instead of what difference it will make in general. | | |
| ▲ | Dylan16807 3 days ago | parent | next [-] | | > 10 lbs per motor in an aircraft is huge. That's cool but the conversation was about cars. It's a welcome but tiny improvement for cars. Even after you multiply by 2 or 4, especially because the more motors a car has the smaller they are. | | |
| ▲ | catapart 3 days ago | parent [-] | | No, it's literally - by the discussion partner's own estimation[0] - cutting the motor size in half. That's not a tiny improvement, it's a half-weight reduction for the motor. It's not as big as I naively estimated from a google search, but it's still half the weight. That's the kind of thing engineers chase as a benchmark and rarely every actually achieve. It's great. But also, I reject your attempt to reframe the discussion as strictly car focused. OP specifically mentioned flight. Which doesn't necessarily mean it was all about aircraft - the article is about cars after all. But it certainly doesn't mean that the conversation was strictly about cars, either. [0]: I've googled this claim and I'm willing to accept it, but the only sources for it I could find were subtractive estimations from youtubers whom had pulled apart the motors. Even additional claims from forums and whatnot seemed to trace back to one of those video sources. It would be nice if Tesla would deign to discuss some specificiations themselves, but if there's an actual official source, I have yet to see it. And, for what it's worth, the motors that I've seen referenced were all for the rear motor that I understand to be the smaller motor in Teslas. Either way, I don't doubt the 70 lbs estimate is far off, so it's moot. | | |
| ▲ | Dylan16807 3 days ago | parent | next [-] | | > But also, I reject your attempt to reframe the discussion as strictly car focused. OP specifically mentioned flight. Which doesn't necessarily mean it was all about aircraft - the article is about cars after all. But it certainly doesn't mean that the conversation was strictly about cars, either. OP mentioned flight. But the part that got argued back and forth over the next 7 comments was about EVs. Aurornis never said a word about anything but EVs. | |
| ▲ | ImPostingOnHN 3 days ago | parent | prev [-] | | I would tend to agree with the other poster that a 10lb reduction, or even a 20lb reduction, is pretty insignificant when it comes to modern consumer cars. | | |
| ▲ | catapart 2 days ago | parent [-] | | Right on. Buy a car with a heavier motor, then. I took this out to the shop floor yesterday and asked the guys what they could do with 10 fewer pounds in the leafs we have around, and believe me - I'm so much less excited about being vindicated in this thread, than I am about the ideas they came up with. Mostly nonsense, but there's some interesting stuff in there that I can't wait for them to try out! | | |
| ▲ | ImPostingOnHN 2 days ago | parent [-] | | I just posted this question to an executive advisory panel consisting of leaders from some of the largest car companies, and they could not stress enough how right and vindicated the other poster was, about a 10lb reduction, or even a 20lb reduction, being pretty insignificant when it comes to modern consumer cars. I guess it's just not worth it to pay way more for a motor just because it provides a pretty-insignificant weight reduction. | | |
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| ▲ | nandomrumber 3 days ago | parent | prev [-] | | The Boeing 737-800 is the best selling jet liner in history with over 15,000 manufactured. The 737-800 has a maximum takeoff weight: 174,200 pounds (79,010 kilograms). What’s 10lbs got to do with anything? |
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| ▲ | hinkley 3 days ago | parent | prev [-] | | Smaller motor can be one per wheel which means a shorter drive shaft, less rotating weight which means more torque to the road under acceleration and deceleration. Tesla still doing a gearbox? Their marketing has been telling me they got rid of those. Typical. |
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