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

  1. Thanks for taking this field trip to Quebec for us. It was a long video, but I learned a lot about how graphite is processed. I am really impressed with how they are trying to mine graphite without disturbing the environment. I hope that more North American businesses take advantage of this growing need for graphite so we are less reliant on China.
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  2. Congratulations on your new Model 3 performance.
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  3. A multiple ringed circle would be more structurally sound and could use a spoke-and-hub design for transportation. Kind of like the Pentagon but round and on a larger scale. Would not need the height requirement and could make them different heights, increasing moving inward, to not block sunlight and maximize solar panel and hydroponic farm exposure. The increasing height moving inward would reduce wind at lower levels and increase it at higher altitude, allowing for efficient wind power on the roofs.
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  4. One thing that people don’t really consider is the same argument that is used against ICE cars - lack of refuelling stations. We are so used to almost always being within a few miles of go-juice that for many, the relative lack of places to get it is off putting. Fast forward a year or two : when a significant number of BEVs are on the road the demand for petrol will diminish and at some tipping point gas stations will become uneconomic and many will close. Then the boot will shift to the other foot. Fossil fuel providers with foresight should now be installing charging points alongside the pumps so that the changeover will be less disruptive for them - and by doing so will hasten the tipping point arrival.
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  5. I found the same throttle-jitter on the R1T when in sport mode. My guess is it really just wants to go, so feathering it like that messes it up.
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  6. Hey Ricky, I always appreciate and look forward to your videos. You give facts, speak in a down to earth manner but don't act like a know it all. Very natural, like talking to a friend about a new product. Thanks for the info and how you present.
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  7. This side of YouTube is called: knowledge!
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  8. As a mechanical engineer too, I draw a very different conclusion: boat propellers must often be very poorly suited to the boat they're attached to. They are operating way outside of their optimum angle of attack, giving very low efficiencies. On the other hand, aircraft propellers typically operate at up to 90% efficiency. Variable pitched propellers are able to maintain operation near that 90% for most of an aircraft's normal speed range. I don't see an easy way of achieving variable pitch on the new propeller design. I would really like to see wind tunnel test data for efficiency over a wide speed range, to see whether the real benefit of this new design is wider speed range at decent efficiency. That could render variable pitch redundant, which would be a good way to reduce cost and failure modes. Would love to see a more detailed (nerdy) follow up 🙂
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  9. Great work Ricky! Scooby snacks for you. Comment; If the balloon can be steered against the wind, how can it be "Blown off course"? Possible payload: EMP Electric Magnetic Pulse. Ricky! Could you please make a video about EMP's and there effects after one is set off? One possible defense system could be other balloons with various weaponry.
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  10. I think this balloon was just testing the payload capacity, carrying a Tesla Roadster into the Stratosphere. Thanks for this video. It's not about renewable energy, but it's still an interesting take on a popular topic. I enjoyed your examination of the mechanics and physics of it. Legal Eagle has a nice video on the legality of floating a balloon over another country and of shooting it down.
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  11. Thanks Ricky for making this video! I've always clenched when saw those intricate roofs, thinking, how on earth will you put solar on them? Therefor, when it came to designing my home I told the architect to just design the simplest roof, maximizing the area I'll be able to put solar on.
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  12. Seriously thinking about this for my mini.
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  13. Your videos are always so awesome and interesting, I love it!
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  14. Congrats Two Bit.
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  15. I've got an 18 kW array and hopefully in the coming months I'll get a 3 Powerwall setup. Looking forward to having backup power and probably mitigating all my contributions to the duck curve. It's not cheap, but it feels like the right thing to do. If I can manage it and opt not to, how can I expect anyone else to do so?
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  16. 7-seater modelY is the ultimate family EV ( the price reduction now makes it even more awesome )
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  17. Great presentation skills - as always! I always look forward to your presentations.
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  18. Great discussion of the voltage and amperage issues. You didn't mention the difference between operating voltage and open-circuit voltage, so lets be sure that people understand that. Open-circuit voltage is the voltage the panel(s) generate when there is no current being drawn. The total open circuit voltage in series must be lower than the maximum voltage accepted by the inverter. So if you have three panels in series, you take Voc * 3 and make sure that number is less than the maximum voltage the ecoflow can handle. Also note that even in shade, a solar panel will generally be producing its open circuit voltage when open circuited (no current). Operating voltage is the voltage the panel(s) generate when operating at their maximum power point. It also tends to be roughly the voltage the panels operate at when partially shaded (just with less current). You want the total operating voltage in series to be within the MPPT range of the EcoFlow. And its actually a bit more complicated because you also want the inverter to be able to handle a partially shaded string, so really you also want the total operating voltage in series, minus one panel, to also be within the MPPT voltage range of the inverter. Also keep in mind when calculating the total possible production, that the production is occurring at the operating voltage, not at the open circuit voltage. So you want the total operating voltage of the string to be as high as possible to make as much production as possible given the current limit of the inverter. -- Now there is a huge problem with partial shading in a parallel x series configuration. In your case, 3s3p. The problem is that if a panel in one of the series is shaded, the optimal operating voltage for that string is far lower than the optimal operating voltage of the other strings connected in parallel. Since the voltage is forced to be the same for things connected in parallel, this will cause the partially shaded string to contribute almost no current (essentially losing the entire string instead of just the shaded panel) due to the other strings forcing the voltage higher. This is why you generally do not want to parallel strings, not in modern day. You want each series string going into its own dedicated MPPT. That way partial shading on one string only drops out the partially shaded-panels in that string and allows the rest of the panels in that string to fully contribute to your production. -- And there is also a problem when you parallel more than two strings. Nearly all solar panels are specified to only be able to parallel two strings without fusing. The only safe way to parallel more than two strings (and I would argue even when paralleling just two strings...) is to run them through a solar combiner box that includes a series fuse for each string. If you don't do that and one of your strings shorts out (due to damage or whatever), the other strings in the array will feed their entire combined current into that one shorted string. If you have more than two strings in parallel, that can cause a fire. That's why a proper solar combiner box is necessary when paralleling panels or paralleling strings. (But as I said above, in modern times you want to avoid paralleling strings if at all possible and have each string going into its own dedicated MPPT, to ensure that a partially shaded string can still contribute to production). -- And there is ALSO (yet again) a problem when paralleling a lot of strings... now the highest possible current might exceed what DIYers actually use for their wiring. And that can cause a fire too. As long as there is a series fuse for each string, then the wiring for each string only has to nominally handle that string's current contribution. The trunk (after the paralleling) wiring on the other-hand must be able to handle to the total combined current. Getting 30A-capable "solar" wiring and MC4 connectors for this is easy. Once you head north of 20A, though, a lot of the cheap stuff people buy starts to have problems. Cheap MC4 connectors, cheap wires, bad crimps, etc... things can get dangerous in a hurry. Yet another reason not to parallel more than two strings. Hand-touching the MC4 junctions and all the wiring during full production is a good idea to make sure there are no hot spots. -Matt
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  19. Zoning boards in the US don't allow for master-planned cities like this. Let the architects do their job!!!
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  20. After this video, I don't think there's much chance of you getting to do an appraisal on any Porsche let alone a Taycan lol.
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  21. Technically speaking heat is light. Heat is infrared light - its just lower frequency.
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  22. I was looking at making an ultracapacitor powered car for drag racing, but the energy density is just too low. Batteries can largely handle all the power output and input you need, especially on the bigger packs due to the huge amount of parallel batteries all splitting g up the incomming charge. The real world benefit from recharging with supercaps changes regen recovery from 80%ish to around 98%. Now to run 300kw for 10 seconds(drag scenario) you need 3Mjoules of energy which will require approx 250 cells, but to get the voltage you need will be about 150 cells X 2 in parallel. Which will get you one run down the drag strip, weigh 150kg and cost 14,400 euros. Now you can do that cheaper with lithium, with the same weight and have about 20x the energy. But instead of a million recharges(caps) you might get 1000(lipo) Also the skeleton supercaps are 3200F which is the same energy density as other leading caps. But yes once they get single layer stuff happening then energy density might get to the level where it is almost a substitute for batteries.
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  23. That young man is very fortunate to have such an awesome dad! We’ll done, sir!
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  24. Atmospheric Water Generation, basically treating air conditioner/dehumidifier condensate to potable quality, is another important fresh water solution. This can also be solar powered and in complementary usage with desalination for inland areas remote from oceans and fresh water sources.
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  25. I can't get over the fact that in all my years, it has been very uncommon to have any battery outlast the device that it goes into. Drills, computers, phones, emergency exit lamps, etc. Then factor in the self-discharge rate. Use it or not, the car is going to be dead in 10 years. I hope I am wrong, but just because a Panasonic 18650 cell is dumped into a car, it is supposed to last longer? Battery technology has a ways to go yet.
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  26. Convert the failed power plant to a PV plant You have all those wonderful tracking stands. You also could convert it to a gravity tower power plant using PV during the day and gravity at night.
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  27. I've been very aware of radiation cooling, but this technology is amazing! Very well reported. Thanks!
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  28. Great video, very important topic. People are REALLY dumb. I live in a hot climate, where most people spend a lot of money using plenty of energy on airconditioning, yet the majority of new homes have a dark coloured roof, often charcoal or even black- ABSOLUTELY CRAZY. Even basic white keeps your house and your surrounding environment cooler. We fitted a new white roof to our early ‘70’s house in 2012. The difference in summer cooling cost was dramatic!
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  29. This is amazing well done, as all your videos, but definitely the most complete comparison I have seen out there. Keep up the great work!
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  30. How dumb would I be to switch to electric when they control the grid and have failed us multiple times now to keep it up? Our gas stove and fireplace were all we had to eat and keep us warm!
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  31. In addition to roadrunner and in-house cells, may discuss cell to pack, eliminating the module. May discuss tabless cells (which Elon said is a lot more important than it sounds) resulting in higher efficiency and better cooling. Might shock everyone by revealing the Model S Plaid.
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  32. Very strange that I should here about Goodyear's discovery twice in just a few hours from completely unrelated sources. While trying to sleep this morning, I was flipping channels and Curse of Oak Island was talking about the most common agreed-to timeframe for 19th century rubber evolution after they found a rubber pipe. At any rate, 98% of man's best inventions came about as complete accidents.
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  33. I hit the like button 10 times before you said 1, sorry!
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  34. Quite a bold move for Ford and I celebrate that! Needless to repeat how well made all yours videos are. Congrats! Hard to note what's NOT there: noise! While playing at the off-road track, the noisest was your hands grabbing the wheel...
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  35. SHIPS ARE ALREADY REPLACING FUEL SHIPS IN NORWAY AND ICELAND
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  36. Love the specs and pricing, and although I really appreciate the courage Tesla showed with the design, overall nope, just don't think it's for me--looks like I will stick with my first choice, a Model Y. Too bad, as I wanted to love this truck (really liked a couple of the pre-reveal renderings I saw online) , and per Elon's comments pre-reveal, I knew it would be different looking--warmed up a bit to the front end design, but the back half of the truck (not a fan of sail pillars), just a no go for me. That being said, I am glad the pre-order numbers are strong, as I love the company and want it to do well, but I won't be buying the truck--AWD Model Y for me in 12-18 months if I can swing it!
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  37. A couple of things I noticed that you missed. Whilst Panasonic own and operate the cell manufacturing side at Giga Factory 1, Tesla have been instrumental in developing the various cell chemistry's and form factor. Also, the latest info from the last share holders meeting, it was mentioned that the next generation cell would be cobalt free.
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  38. I am saying this as someone who has been working on microgrid systems, your information is very accurate.
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  39. This will be a #1 seller for sure. So much utility 👍🏽
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  40. The main thing that the superheavy has to get starship through is the atmosphere, not the higher gravity. Once a starship is hurtling sideways in orbit, there is no atmosphere pushing against it.
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  41. What an awesome trip to Vietnam!! It is definitely bucket-list worthy. Great review and super informative. People need to see the benefits of EV ownership and VinFast is bringing a potentially disruptive model to the marketplace.
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  42. Really nice presentation! Very exciting news - I hope they can replicate their success!
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  43. Hey! I'm the first viewer! Love your insights... Would love to hear your opinions on the Tesla/Musk experimental projects for solar powered desalinisation of sea water for remote rural communities (currently ongoing in Kenya's northern coast). Keep up the great content.
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  44. Great video! I remember being fascinated, as a child, by the way sand retains heat, it was something that I had definitely noticed, because I lived adjacent to a sandy seashore. I think these sand batteries are an amazing adaptation of a natural resource to store energy. The batteries could also have cladding to enhance their retention of energy.
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  45. Love this update.
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  46. Love how well managed your videos are. This one with Sandy is as good as it gets.
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  47. We need to use all of them combined and where they work best in conjunction with good battery storage. and we need to make it so cheap and available that no matter what cheating and propaganda the fossil fuel industry employs consumers will automatically choose renewable options because they work better and cost less.
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  48. Solar rood and electric vehicles come hands in hands. We get plenty of sunshine in Southern California. Why not?! 🦅🦅🇺🇸
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  49. What is more fair? $55,000 receiving the $7500 tax break (13%) and $35,000 receiving the $3750 (11%) OR $55,000 getting the $3750 (7%) while maximizing $35,000 at $7500 (21%). You run the company...you decide...what's your decision? Tesla ALREADY made the SMART move of NOT delivering their 200,000th car until July 1 thus ensuring MAXIMUM tax credit. This move gives the MAX credit to the MOST expensive models.
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  50. I love how you chose the V6 Camrys so that they could compete with the performance aspect of the Model 3. Whenever an oil lobbyist does the calculation, they always choose the smallest and slowest eco ICE car to minimize the amount of pollution of their side. And the Camrys are a pretty reasonable choice. If you wanted the fight to be fair, you should have chosen the highest selling gas guzzling vehicle in the US like the F150 pickup truck and the ICE car would never stand a chance... Ooooh wait, you just did that. Great move !
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