Hearted Youtube comments on Two Bit da Vinci (@TwoBitDaVinci) channel.

  1. I'm getting giddy thinking that this might actually happen in my lifetime. I hope it does soon.
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  2. Volunteer: "Here are all the EVs" Consumer: "Oh cool, which it the best one?" Volunteer:: "They're not here".
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  3. I have the Tesla now, and couldn't be happier that there are multiple very strong EV options for buyers today. I also couldn't be happier that there's great competition between two American car companies. Thanks for presenting a really well considered and factually presented comparison. I know I would have been thrilled to drive a Bolt -- either car is still a huge step up from my 12-year-old 110,000 mile Prius. And I loved that car.
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  4. It’s really disappointing to have no EVs that is close to what Tesla has to offer. After owning an EV, I am no longer interested in ICE cars. Thanks for the video!
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  5. Man, you’ve got some adorable kids.
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  6. Great post, Ricky! Just the facts, and as much tech as we non aerospace engineers can absorb. Thank you, sir!
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  7. Glad you touched on the recycling piece. I hope PolyJoule engages with you for a follow-up video.
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  8. I have an older house with a complicated, unhelpful roof. I built a solar porch with 30' x 16' of panels. It's only 6kW - but with 14kWh of batteries, it's enough for 9 months of the year. I'm surprised more people don't do similar. You get a nice shaded porch & deck out of it too. Total cost of the groundworks, steelwork, panels, battery & inverter was about $30k. It will take 6 years to pay for itself - but like you said, the most important thing it gives us is independence from the grid.
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  9. Towing range. It's important for a truck. Interesting that they might release before Rivian does.
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  10. The part about the history of ice making was a interesting example of technology innovation
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  11. Our grids are getting cleaner every day
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  12. I want a house with a solar roof, battery, and Tesla in the garage so bad.
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  13. Essentially what he's saying is that Tesla is building the top trim lvl model 3s first to gain money from that and then they will have enough profits to build the base model 3 that everyone wants.its a good strategy tbh.
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  14. Not run the seat heaters???? I disagree with this advice. Heating the seat instead of the cabin air is a much more efficient way to get heat to the person in the seat. Thus, the method I use is to turn on the seat heaters first. In my mild climate this often lets me keep the cabin heat completely off. But, if it's colder, having the seat heaters on lets me have the same comfort level with a lower cabin heat setting. I don't know what the exact numbers are, but (full on) a cabin air heater might be around 5000 watts and a seat heater might be what 50 watts? So, I can run my seat heater for around 1-1/2 hours on the same amount of electricity that the cabin heater will use in one minute just warming up the coolant (assuming the cabin heat is a coolant based system).
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  15. Great video. Interesting topic. Cars and airplanes would potentially be risky, due to their propensity for accidents, thus radiation risks. However, nuclear subs already exist, so ships would be good candidates for the same. Thanks for the great content 👍
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  16. Elio and Tesla should combine efforts and make an electric Elio. It would be more expensive but the car is so light, it couldn't be that expensive for an eighty mile base model (plenty for most for a commuter vehicle). Talk about efficiency!
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  17. Great video, I can't wait for the competition to catch up so we can all afford to drive 100% electric for less than 25k$
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  18. Electic motors are great, their one negative is the freaking battery, improve that and EVs will take over the car market.
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  19. Totally agree. I’ve been a proponent of EVs for years, and every time I tried to convince someone to buy a Model 3 they’re like nah...I want a crossover. And those same people are super interested in the Y now.
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  20. Not a massive failure, it's a massive mistake. What do we do with mistakes? We learn from them! We learn from massive mistakes...massively!!
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  21. Good analysis, but while I agree with the basic premise...that Porsche is just way behind Tesla, I think that some of the reasoning was incorrect. First, it is simply not true that Tesla doesn't sequester battery capacity. Various folks have analyzed this (like Bjorn) and it appears that for a Model 3 long range/performance the actual battery capacity is about 80 kw, of which you can access about 74. So, when you think you are charging to 100%, you really aren't. While it's possible that Porsche sequesters a larger percent of the capacity, it's not clear that they do. Bottom line is that they both limit how much of the battery you can access, both at the top and the bottom. Second, you are mixing up efficiency and range. Range will be a function of capacity and efficiency, but efficiency is what this is really all about. It wouldn't matter what size battery the Porsche had (or what percent was sequestered), the efficiency is just lousy. Third, the idea that part of the Porsche's problem is due to their tying regeneration to braking may not be entirely true. According to Porsche, the vast majority of their braking is coming from regeneration, not friction. In fact, they brag about how they can regenerate more than anyone else due to their "800 volt architecture". The fact is, when you need to slow down you can either take your foot off the throttle (as is the case with Tesla) or you can use the brake pedal. But assuming the same level of motor regeneration is available, it doesn't matter (from a physics perspective) which method you used. It's all about feel, not regeneration. Again, if we believe Porsche, if anything their system should result in MORE regeneration rather than LESS regeneration. So, if these aren't the reasons for the low efficiency, what is? 1. The car is too heavy. For a car with less interior and storage capacity than a model 3, it weighs over 1,000 lbs more. All that weight requires energy to move it. 2. The car probably uses higher rolling resistance tires. This is definitely a choice Porsche is making to optimize handling over efficiency. 3. The 2 speed transmission is a problem. I'll talk about why they did this a little later, but suffice to say that this adds weight and frictional losses. 4. The car uses 2 PM motors rather than one PM and one inductive motor. This may not seem like a big deal, but it is. PM motors are more efficient than inductive motors, so it makes sense to use them as the primary motor in a 2 motor vehicle. Inductive motors are less efficient than MP motors but they have the advantage of having less drag when idling...as they are most of the time in a properly designed 2 motor vehicle. So, unlike Porsche, what Tesla has done on dual motor cars is to get the best of both worlds by using a PM motor at the rear and an inductive motor at the front. Clear evidence of the benefits of this can be seen with the Raven architecture on the S, where they added significant range/efficiency as a result of invoking this architecture that was pioneered with the Model 3. 5. Going back your original point about Porsche just being behind, here are some specifics: a. It's clear from the Model 3 dissection done by Munroe that there is some advanced technology in Tesla's control systems and motors. They believe that the magnets used in the motors are extremely complex and not easy to copy. I suspect that Porsche's motors simply aren't as sophisticated. b. I suspect the energy density of the Tesla batteries is higher than the Porsche batteries. This is because unlike Tesla, who seems to be at the state of the art of battery technology....and controls the manufacturing of their cells, Porsche is buying off the shelf batteries from LG. The result is lower discharge rates for the same capacity and lower power density, resulting in a heavier and lower performing pack. It seems that for EVs, lots of little things add up. This bring me back to where you started. Porsche is simply a number of years behind Tesla, and while they were (barely) able to equal Tesla's performance, they could only do it by having really bad efficiency. I sort of feel sorry for the folks buying a $250k Taycan only to find out that it's going to be hopelessly obsolete within just a few years. Keep up the good work!
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  22. We have a saying in our house: "The boring money." At its source... insulation. The better insulated our structure, the smaller the systems need to be. We are in that phase.
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  23. Chevy doesn't sell many bolts because dealers hate EVs because they don't break down and bring in lucrative repairs dollars.
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  24. The most exciting thing they are doing right now is making my next car.
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  25. Good video, nicely encapsulated. Domestic roofs and walls are, more often than not, doing nothing other than offering shelter and waterproofing to people. So they are free space largely going to waste in terms of power generation. Would seem to be a natural space to put solar photovoltaic panels and batteries to me. And instead of putting flammable coatings on high rise apartments, cover them in solar panels. You get 30-40 years of power generation, and the panels do a half decent job of keeping the weather out too. Put batteries on the roofs and put solar panels on top of them. Seems obvious to me. Do enough of them and they produce as much power as a conventional power station, and for cheaper. Do several cities of them and you produce as much power as a nuclear station for a fraction of the cost. Of course, the drawback is, who pays? Well who pays for another nuclear power station that nobody wants and is too costly to build anyway, and will never be turned on because the electricity coming out of it, if it ever gets built, will be too expensive?
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  26. I remember the EV1, it was too expensive for a lease. It was a good start if it was not scrapped, it would have improved both batteries and motors technically. The protesters was sponsored by fossil fuels supporters! Thanks for bringing back the memories of a car of the future. I believe the same group are against Tesla and I hope Tesla wins this fight. I also hope other auto makers start EV production. Thank you again.
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  27. The days of "Big OIL" are numbered but not for oil as a whole. Way too many modern conveniences are made from oil byproducts. Cars are a big consumer of oil products and sustain the industry at high level of efficiency, diversification, and redundancies.. Shipping {diesel trucks and trains; cargo ships}, home heating {natural gas and/or propane - HVAC, water heaters, clothes dryers, bbq grils, etc; fuel oil HVAC, etc), food (agricultural tractors, combines, etc.)… the "non-car" list is quite long and extensive! Great video! Thanks for sharing❗❗❗ 🙂🙂🙂 👍👍👍
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  28. With judicious use of an exhaust fan in a window, and another window open, I’ve managed to cut my air conditioner use to about 30 hours so far this season. . . at 45 degrees north latitude. . . My electricity bill works out to less than CDN $78/month. Evaporative coolers are great in extremely dry areas. Here in Ottawa, it gets very humid.
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  29. Did a Miele heat pump dryer 18 months ago. Plugs into 110v outlet, zero holes in house, pumps condensed water into sink or on board tank. Does much less damage to synthetic clothes as it modulates heat perfectly. Uses no house air. Uses 900 watts!
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  30. As a matter of fact, roundabouts are better than traffic lights. In Uganda along major highways in the city, we have both! And trust me, they work very well even in such a low developed country.
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  31. Growing up in the country now in city, one of my big concerns is power outages lasting more than a few hours. Gas is always usable and I have a mix of gas and electric heat so I can still be warm and eat. This still happens here in the burbs but not as often as in the country. Then again back on the farm we had our own gas well so it was free LOL.
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  32. This is why I love this channel. You're always selecting the most interesting topics and it's fascinating how people are solving them!
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  33. Solar is the way to go! Great job! 👍👍
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  34. Amazing work 😀. This video is so wholesome , almost felt like a short movie
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  35. They've pushed the battery day back so many times that expectations are very high and they will need to really wow investors (which I hope they do!).
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  36. Wow I just noticed something Tesla Model S Tesla Model 3 Tesla Model X Tesla Model Y Well played Elon
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  37. I can think of an area where lots of drones are used where efficiency may take second place to sound reduction. Think of where a stealthy drone could deliver a payload without alerting the recipients. In this area, the drones must be flown at a relatively high altitude to avoid detection which then reduces the accuracy of the drop of the payload. Reduce the noise, reduce the altitude, increase the accuracy.
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  38. What about flipping it round and lowering big weights from a very large floating platform? Yes, you loose 1000kg/m³ of the weight due to buoyancy, but you don't need to build towers or dig deep holes to lower your weights, just very deep ocean.
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  39. Great videos but why use a clutch plate graphic as the inverter? And didn't I see a turbo in there too?
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  40. I have been waiting for this video for over a year!! 😂😂 thank you!
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  41. We need all of these ideas - the amount of storage required in a sustainable energy economy is massive!
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  42. We’ve had a Tesla solar system installed for four years now, and it’s exceeded our expectations in every area. We chose a 20 year lease, and in the end it has both frozen our electrical costs and we’ve seen a 30-40% monthly cost decrease versus our previous costs from the local utility. The prep & install was like a precision operation, and everyone at Tesla have been stellar. We can’t recommend Tesla enough!
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  43. If I ever install solar panels on my future home....this is the video I'm referencing.
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  44. Ricky, your idea about separating the hazardous cars from non-hazardous seems to be the ultimate common sense (that's not-so-common any more). If they did that, they could charge a bit more for the smaller trainloads and they could actually go a little faster while also being safer. It seems to me that the concept of bundling the cars is done solely by the beancounters who have probably also been responsible for getting rid of the safety engineers and they don't have to justify the bundling any more. Another thing to do would be to have special tankers for the hazardous materials - ones that are much more resistant to damage and would have multiple layers and compartments like ships have to avoid sinking when punctured. While traveling on interstates I've often seen nuclear waste being transported and the containers they use are amazing. They can survive accidents at highway speeds because of their construction. This should apply to any transportation of hazardous materials in relation to the degree of the hazard. GREAT coverage - thanks!
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  45. Interesting explanation of the range loss due to different regen strategies
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  46. You went with this video exactly where I was thinking: combo of super capacitors and batteries is best depending on the niche problem being addressed. So great to see some level headed thinking on YT rather than more blind hype saying that we found a “one size fits all” solution for all our problems!
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  47. Yes! Make a video on heat redistribution (at least at the data-center level) and how we are not taking full use of this topic. Recycled electricity at the time of use!!!
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  48. Thing to remember is that Solar Panels are pretty much always "live". Adding two panels in series takes the voltage to over 100V for many domestic panels. Series arrangements are often a good idea but you need to treat the installation as if you were wiring up your house with the power switch on.....
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  49. I knew Danielle when she was doing her prior clean tech start-up, LightSail (grid scale energy storage). Unfortunately LightSail didn't beat out the battery tech that hit the market, and they folded. I think her use of "LightCell" as a trade name is a riff off of her old company's name.
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  50. I am working on my own Sodium-Ion battery out of a garage workshop. I am going for the small devices now, but hope to grow in large scale end game. The garage projects work still work in this abundant material configuration. Long live ingenuity - one of us will build a great battery in their garage.
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