Thread: EV general discussion

Originally Posted by PhilipA

Another question that I thought of. How many old clunkers with high emissions do new immigrants keep on the road when they should be scrapped?
Regards PhilipA

Interesting thought. You might be surprised.. some students particularly from Asia are very wealthy. They aren't really here for a degree, but they have to "study" to get the residency. It's pretty whacked. If you cruise around the nice uni's you will see lots of high end cars.

There are no doubt many though who don't have this money. Do they keep the cars on the road longer? I would suspect they probably do extend out the fleet somewhat. Probably the ration is similar to the rest of society - which is .78. So if you've added 1.5 million people you might need an extra 750-1000k cars?

Unfortunately the ABS haven't updated the data since 2021... Will be interesting when they do update it.

"First mass electric car with all-wheel hub motors has no brakes or CV joints

The Dongfeng sports sedan variant with all-wheel hub motors. (Image source: MIIT)Chinese EV makers have been in a race to introduce the world's fastest electric motors, with BYD's Super e-Platform featuring a 30,000 rpm unit. After speed, the electric motor innovation has now moved to developing in-wheel placement, cutting dramatically on drivetrain components"

Read this news a few days ago. Wheel hub engine with flyby wire control could be a game changer -Other than the solidstate batteries and 1000 kWh chargers about to land of course

"no traditional braking system of disks, pads, or calipers as a backup, as well as no CV joints."

"Lightweight hub motors help achieve 25% higher energy recuperation when braking as they allow more granular control of the slowdown effort."
"Each wheel can act independently of the others, improving traction, while the hub motor concept shortens the turning radius by up to 15%. Drivetrain efficiency has been improved by up to 30%, too, thanks to the direct wheel control that eschews the energy loss during transfer through a more traditional setup."

That last line is very interesting. Energy losses is a critical issue in many circumstances. A Golf ball size bit on nuclear fuel for example would provide every bit of power one or more of us could use for our entire lives.

"The efficiency of petrol engines typically ranges from 25% to 30%, meaning that 70% to 75% of the energy from fuel is lost as heat."

If you like maths its

where, Q1 is the heat absorbed and Q1−Q2 is the work done



As usual this is 'About' to happen not here yet


A stripped-down RR, Deefer or Disco with 4wd via 4 axial flux "pancake" motor could with the two other bits needed 'could' 'maybe, 'possibly' be a beast of a machine!

Originally Posted by NavyDiver

"First mass electric car with all-wheel hub motors has no brakes or CV joints

The Dongfeng sports sedan variant with all-wheel hub motors. (Image source: MIIT)Chinese EV makers have been in a race to introduce the world's fastest electric motors, with BYD's Super e-Platform featuring a 30,000 rpm unit. After speed, the electric motor innovation has now moved to developing in-wheel placement, cutting dramatically on drivetrain components"

Read this news a few days ago. Wheel hub engine with flyby wire control could be a game changer -Other than the solidstate batteries and 1000 kWh chargers about to land of course

"no traditional braking system of disks, pads, or calipers as a backup, as well as no CV joints."

"Lightweight hub motors help achieve 25% higher energy recuperation when braking as they allow more granular control of the slowdown effort."
"Each wheel can act independently of the others, improving traction, while the hub motor concept shortens the turning radius by up to 15%. Drivetrain efficiency has been improved by up to 30%, too, thanks to the direct wheel control that eschews the energy loss during transfer through a more traditional setup."

That last line is very interesting. Energy losses is a critical issue in many circumstances. A Golf ball size bit on nuclear fuel for example would provide every bit of power one or more of us could use for our entire lives.

"The efficiency of petrol engines typically ranges from 25% to 30%, meaning that 70% to 75% of the energy from fuel is lost as heat."

If you like maths its

where, Q1 is the heat absorbed and Q1−Q2 is the work done



As usual this is 'About' to happen not here yet


A stripped-down RR, Deefer or Disco with 4wd via 4 axial flux "pancake" motor could with the two other bits needed 'could' 'maybe, 'possibly' be a beast of a machine!

I do think they reason why no one has actually done this yet is because there are really good engineering reasons why it's a bad idea. It's hard to imagine that a motor which gave sufficient power wouldn't be quite heavy.

Originally Posted by Captain_Rightfoot

Yes exactly. Every litre of petrol burned generates 2.31 KG of co2. A litre of diesel 2.7. One KG of Co2 is a bit over half a cubic metre depending on temperature. There aint no caves anywhere big enough to un-duck this mess.

We are lucky in Australia though.. we don't really have cities that are too prone to air quality issues so we tend to not worry about it. But when the auto makers were confronted with a problem (their products were causing real air problems) they came up with solutions. I would like to state though it's not all roses.. ie dieselgate, and performance of emissions systems on startup and anywhere outside of the parameters of the emissions test.. but I digress.

Yes, this is the truth.... Still, what is you're point? It is still 0.039% of the air. ie: a trace gas. This is all just absolute nonsense. Nothing australia does will impact the amount of C02 created in the world. Nothing we do will change any possible heating/cooling of the earth.

We can do NOTHING. So why are we trying to bankrupt the country with stupidity?

How about we talk about the planetary destruction going on to build all of these batteries being fitted to everything...... Yes I know, we don't care as that is in the "poor peoples" countries. so isn't a part of our atmosphere right? just like offshoring all of our pollution to china so we can claim how amazing we are.

smoke and mirrors .... its all smoke and mirrors and lunacy.