Comments by "David Elliott" (@davidelliott5843) on "Two Bit da Vinci" channel.

  1. High level nuclear waste has a 30,000 year half life because the long life actinides have not been used up. PWR creates them cannot burn them. Just 4% of the energy is extracted. Fast spectrum molten salt reactors by Moltex and Elysium will be fuelled by nuclear waste. Fully using the energy drops the waste 1/2 life from 30,000 years to just 30 years.
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  2. Two stoke engines give that instant power, feeling like the throttle cable is connected to the wheels. The old smokers back in the 1970s were dirty and wasteful. They new ones such as Rotax ETEC (used in Skidoos and Evinudes) are clean and efficient. They would make far better hybrids than the stuff Big Auto throws out.
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  3. Bigger or smaller rim diameter makes no difference because tyre side wall height varies. Large rims get thin tyres small rims get fat tyres. Rolling diameter is the same. If you fit smaller diameter wheels your speedo will read fast and you pull better on hills but the energy demand (due to drag) is the same.
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  4. Batteries could be the solution for Utlity scale power storage but we simply cannot build enough of them.
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  5. The costs of that F22 are not as high as suggested. Basically it’s fuel plus the missile. All other costs are there anyway because the jets and staff were not put up specifically for this job.
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  6. The skinny tyres Tesla use on top spec cars are poor for aero (wide and square) and fragile over normal pot-holed roads. 17 inch with round shoulders and aero covers will ride far nicer use less energy and only marginally affect handling.
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  7. @coldoustiderightnowtho A centre opening pair of doors over the load bed would be more reliable than sliding shutters. Can you imagine how dead leaves, grit and ice will jam up the slides.
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  8.  @fredrik83  Stainless does not paint very easily but it could be wrapped no problem. Replace when you get bored and easy to install on flat panels.
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  9. These cities are all in countries that want to look bigger than they really are. Dubai looks sharp but a collection of hotels and condos is not a real city.
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  10. At the extreme end of the scale, a motorcycle in winter becomes no major problem with heated clothing. Without is almost unusable. A fully heated suit will use about 100 watts but it has to cope with huge airflow cooling. I would imagine a heated car seat will peak at 100 watts but average a lot less. Even with all four seats running, 400 watts is small beer compared to the main drive motors.
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  11. If you have the money to buy the Porsche why would you when it’s so flawed and frankly so ordinary looking? The Tesla Model S is super cool and fast and premium quality. A few Posche fanboys might buy the Taycan. However anyone else with the cash for the Porsche could buy the Tesla and a pile of Tesla shares. Or they could have the interior fully retrimmed and still have cash to spare.
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  12.  @peewee007654321  Just wrap it and then do it again when you get bored.
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  13. Why does this video brush over Spain’s totalitarian period? Franco stopped work on the Cathedral because its religious despots don’t like religion. It’s also highly decorated. Fascists prefer soulless blocks and it’s in Barcelona an area that really wants to be self-governing if not total separation from Spain.
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  14. This is more proof that THE LEFT do not want zero carbon power because it risks exposing their narrative. THE RIGHT don’t want it because they are doing fine as is and they don’t like change.
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  15. The writing is on the wall for big oil. But they’ll bounce back. For a while. However when electric cars really take off the same will happen again. Only by then it will be permanent. As electric cars become more affordable, people will put off changing their cars. New ICE car prices will tumble while used cars will hold up in value. Then when electric cars become affordable to all, the value of used ICE cars will collapse and sellers of new new ICE cars will go broke. This could happen by 2025 but it depends how fast electrics become affordable.
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  16. MicroAppleFlan. Oh hang on - Big Jeff isn’t represented. MicroZozAppleFlan. Sorted.
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  17. Old fashioned PWR utility nukes produce a huge volume of waste heat but its at low temperature so not really enough to evaporate sea water. Today's molten salt designs burning any fuel (new uranium, irradiated old fuel or thorium) run at high temperature. This leaves then far more able to use the excess heat to desalinate sea water or work in series with solar heating to get the job done. The huge benefits are low installation costs and extremely low nuke waste. PWRs have such horribly long life used fuel because it's after just 4% of the fissile energy has been taken. Molten salts running in the fast spectrum can take 99% of that energy leaving a "waste" with a 1/2 life of 30 years vs 30,000 years for PWR use fuel.
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  18. Tesla is a battery company that makes cars. But in cars alone, their Big Auto competition is not yet doing what Tesla was up to in 2013. VW put all their eggs in the diesel basket but are now going EV in a big way. They have to kill the spectre of diesel gate. Porsche have a new electric saloon but on every real world measure it’s not as good as a twin motor Model 3 and it costs 50% more.
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  19. One item from a box of Swan Vesta will start a fire. Nothing high tech needed.
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  20. Could the batteries be cooled/warmed without the wavy tube manifold? I mean could they be “wetted” by a non conducive coolant?
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  21. What do you guys think about brakes seizing from lack of use. Don’t get me wrong I’m not looking for problems. The issue is that every low miles car I’ve bought suffered rusted and seized brakes. How are Tesla handling this(?) as EVs hardly use the brakes. Thinking on from that - the old Citroen powered hydraulics would be perfect on a Tesla. One pump powered steering, suspension and brakes using a mineral oil system. The suspension gave incredibly smooth ride, minimal body roll, load levelling and variable ride height. Springs were gas spheres. No more broken springs. Being mineral oil there was no internal corrosion as we get with brake fluid.
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  22. Moltex are going through homologation in Canada for a fast spectrum molten salt reactor. There is no fancy molten metal coolant and there is no fuel reprocessing. They take used fuel and chemically process it into a salt which is diluted with chloride salt. The isotope content is unchanged. The salt fuel is packed into open ended stainless tubes. The reactor core uses the same salt (minus fuel) as a heat transfer medium. The reactor itself is a concrete box with a third salt loop to remove heat. It’s fully self regulating, cannot overheat and has one moving part - a salt stirrer to keep the regulatory body happy. It also has power cut-off rods but really doesn’t need them. It’s intrinsically safe.
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  23. Carsand trucks these days are designed to fall apart after about 10 years. With million mile battery and uber tuff body shell this could go on and on and on and on. Market shrinkage will affect all other manufacturers except the disruptor Tesla.
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  24. You could install two power wall units.
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  25. The lower 1/3 to 2/3 of any house wall will get hit by rain and water spattered off the surrounding ground surface. This is why bricks are so good. They withstand the water and joints can be repointed every 100 years.
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  26. The LiFEPO4 cells really are solid state but they don’t have the energy density of electrolyte Li-Ion cells. Maybe these are the start of viable solid state traction batteries.
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  27.  @baneverything5580  The snag with these thermal circulation systems is that nutrients are moved in ways that nature could never do. These can act as pollutants when dumped into the wrong areas.
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