09-27-2020, 05:43 PM | #113 |
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09-28-2020, 01:47 AM | #114 | |
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09-28-2020, 01:59 AM | #115 |
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Mercedes Vision AVTR EV
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09-28-2020, 03:17 AM | #116 | |
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With silicon nitride seals, seal life is very good. I'm not really suggesting that this is the best way to get 2000hp, I'm saying you can make a lighter car with a rotary engine than is possible with an electric drivetrain. The reason is that an electric drivetrain needs a lot of battery capacity to have any reasonable range, and that battery is thus capable of supply large amounts of power. |
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09-28-2020, 12:56 PM | #117 | |||
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The Koenigsegg 2.0L 3-cylinder, twin-charged motor weighs 70kg and produces 600hp. You are saying a Wankel can make the same power and do better, or maybe just cheaper? Still, here are the latest EVs. If battery packs can reduce in size because of light materials or just improvements in energy yields, or if battery charging will be so fast that charging is a non-issue, so batteries don't have to be as big, then the case for the ICE gets worse. Regardless, my whole argument is that there is a point at which there is a crossover in weight/reliability/cost with ICEs and EVs, and that point might be 1000-2000hp, but whatever it is, it exists. To get an ICE vehicle to match the Tesla Roadster's performance with the same reliability would likely cost a lot more. Hell, the Model S Plaid is $140k and beats a 911 Turbo in all metrics that I am aware of, except maybe top speed or like 100-200mph, so the crossover already happened. It is faster 0-60, quarter mile and track time at Laguna Seca. https://newatlas.com/automotive/equi...lectric-motor/ Quote:
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09-28-2020, 01:03 PM | #118 | |
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I guarantee you the Koenigsegg engine does not weigh 70kg...not when you add the turbos, electric generator, exhaust, intercooler, radiator, and emissions equipment. 70kg would be about right for the bare engine. A turbo Honda L15B7 is close to 130kg all in, and I guarantee you that engine is lighter than the Koenigsegg. |
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09-28-2020, 01:37 PM | #119 | |
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Second sentence: It’s a Koenigsegg—not a Honda.
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09-28-2020, 02:29 PM | #120 |
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Batteries are still the problem. Hydrogen refinement (for production) and hydrogen storage and refueling are what needed to be worked on instead this battery nonsense (for vehicles and heavy equipment) IMO.
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09-28-2020, 06:56 PM | #121 | |
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Hydrogen is a good solution for some heavy applications and interstate Semis, but there are potential solutions such as battery swapping that might make it a non-starter. We need a ton more hydrogen production from water electrolysis because it essentially doesn’t exist. We also need a lot more utilities than with batteries alone because we need energy to make hydrogen and to transport hydrogen to ultimately use hydrogen to charge batteries. We would have less need for batteries though, yet recycling batteries for making batteries and for grid storage means hydrogen is less efficient.
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09-28-2020, 07:06 PM | #122 | |
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https://www.bloomberg.com/news/artic...first-shipment |
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09-28-2020, 07:24 PM | #123 | |
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This goes back to the conversation about not being able to leave a electric car out in low temperatures. Large battery packs are a liability if I can't park my car outside my own residence without irreparable damage to the power train just because it was cold. Those problems might not exist in kalifornia, but they do exist in about half of the rest of the country. |
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09-28-2020, 08:14 PM | #124 | |
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You can still buy a gas guzzling Mercedes G or Bentley today but those engines are very clean in terms of toxic emissions. Koenigsegg badges don't make aluminum and steel magically lighter...the intercooler and turbo are going to be at least 50lbs alone, and even a carbon fiber crank case 2L long block would weigh well over 100lbs. |
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09-28-2020, 08:46 PM | #125 | |
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https://www.google.com/amp/s/cleante...-cold-36c/amp/ Question: currently the Honda Clarity, Hyundai Nexo and Toyota Mirai are $58k and have pretty poor performance. I don’t know what makes them so expensive if it isn’t the powertrain, but do you think that price-tag will go down much? https://www.google.com/amp/s/cleante...-vehicles/amp/
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09-28-2020, 09:29 PM | #126 | |
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You can park your Lotus Evija outside no problem |
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