Comments by "roidroid" (@roidroid) on "Engineering with Rosie" channel.

  1. IIRC the -Brisbane International Airport- runway (HUGE amount of concrete) used a carbon negative geopolymer, developed by a local university. Edit: oh it wasn't Brisbane's Airport, it was a Toowoomba airport (a town 130km inland of Brisbane. "BWWA is built with approximately 40,000 m3 of geopolymer concrete making it the largest application of this new class of concrete in the world" [2015] Nice
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  2. 6:30 "...mining battery materials" Which would pale in comparison to the amount of the extra COPPER (expensive!) being mined to create all of that inductive charging infrastructure. Inductive charging coils ARE NOT SMALL! It'd be easier to just create the batteries. edit: Honestly, they should be using aluminium coils. There's probably minimal issues with vibration (at least compared to copper in motors) & impacts, aluminium would probably be ok in this usage. You just need 3x as much volume, but whatever, it's still lighter-weight (tho probably not an issue in roads) and WAY cheaper & more available than Copper.
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  3. 14:27 Anyone who has ever bought any sortof lith-ion battery from China - via Ebay or Ali-express or whatevs - knows how LAUGHABLE this suggested tracking platform would be. They can't even ensure their exported batteries are the STATED CAPACITY, it's all exaggerated, they don't care or can't do anything about it. That entire online sales thing is ONE BIG BLACK-MARKET FLUSTER-CLUCK (they're almost all factory-seconds, smuggled out into the market). Now they think they can track every battery their country will make?! Ridiculous, start small first.
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  4. 1:20 "Sure, Mars is the most Earth-like planet in our solar system". aCtUaLlY... Earth has that title :P
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  5. 3:55 "...swapped my 2nd coffee for [OMGPRODUCT]"... contains (blahblah) & Nootropics " Well durr, Caffeine is just another Nootropic. i used to take *Racetams a while ago (legal to import in Australia back then) - to good effect! Then a decade later i was formally diagnosed with Adult-ADHD, so now just take those similar drugs instead.
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  6. What's Nuclear got to do with Copper? That's like saying we don't have enough iron to make cars, therefore we should be using diesel engines in cars (what?) I share your concern about Copper's scarcity tho (i too dread the approaching "Peak Copper", not often talked about). But we'll likely simply be substituting more copper infrastructure for Aluminium alloys of comparable mechanical properties. You may be surprised by how much electrical cabling used in the hobby RC industry (incl motor windings) is already primarily Aluminium alloys rather than copper.
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  7. it's the future of what, dirty water? ok?
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  8. Lith-ion battery recycling is relatively rare. Because the batteries last so long, there are typically SO MANY secondary uses for the batteries AFTER taken from the car (eg: Stationary home-batteries), before they ever get close to recycling. You gotta remember, most ppl who are concerned about lith-ion battery recycling are probably coming into the topic from MISINFORMATION sources like BBC-TOPGEAR and other Tabloid rags, telling them that batteries will "only last a couple of years, oh no!". All of those ppl are quite misinformed. But with that foresight - you can prepare for their very predictable questions!
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  9. Some unspoken context: Australia has been experimenting a fair bit in this space (industrial output levels of green Hydrogen & Ammonia), so things regarding green Hydrogen/Ammonia are discussed here with a bit more clout/confidence than usual.
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