Thoughts on banning Petrol, diesel & hybrid vehicles by 2035

js190d

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It does.
"He also said it was able to hit 60mph in 20.0sec when the trailer is fully loaded with 80,000lb (almost 36 tonnes) of cargo. This beats the average sprint time for diesel-powered rivals by around 40sec."
I meant the weight of the vehicle itself including batteries. It is not unreasonable to expect an electric truck to weigh considerably more than an ICE truck.

This means it can carry less cargo, up to the overall maximum weight limit set by state or country.

For example the batteries in a Tesla Model 3 car weigh 478kg. That car weights 1730kg. Range 300 miles

No stats for truck.
 

js190d

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No reason constant speed should reduce range. Regen braking only recovers energy already expended and is not 100% efficient. It's not energy for nothing unless your start point is higher than your end point and you aren't making a return journey.
Laws of thermodynamics apply.
See Harry's garage Jaguar electric Pace suv thing test. Mr Metcalfe test results may interest you .

Re-motorway speed economy/ range issues 20:55 onwards

 
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LostKiwi

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I meant the weight of the vehicle itself including batteries. It is not unreasonable to expect an electric truck to weigh considerably more than an ICE truck.

This means it can carry less cargo, up to the overall maximum weight limit set by state or country.

For example the batteries in a Tesla Model 3 car weigh 478kg. That car weights 1730kg. Range 300 miles

No stats for truck.
So a model 3 weighs about the same as a 2 litre Mondeo and is slightly down on range 300 compared to 350 but has 4wd and accelerates a lot quicker.
 

js190d

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No, an electric truck weights more than a truck with an ICE engine

That is because batteries are heavy.

That means it can can carry less cargo

That means more journeys are required to deliver the same amount of goods.

The Tesla truck has no weight stats because they would show it can hardly carry any load weight because the batteries are so heavy. What 0-60 times have to do with trucks i do not know.
 

LostKiwi

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See Harry's garage Jaguar electric Pace suv thing test. Mr Metcalfe test results may interest you .

Re-motorway speed economy/ range issues 20:55 onwards

Nothing to do with regen. As he himself says it's speed related exactly the same as an ICE car. As you go faster the wind resistance increases.
 

js190d

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Nothing to do with regen. As he himself says it's speed related exactly the same as an ICE car. As you go faster the wind resistance increases.
In a petrol or diesel car you will get good economy on a motorway at a constant 56mph, that is well established fact.

In an electric vehicle this will not be the case. They appear to offer best range when used at lower speeds and around town.
 

EmilysDad

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In a petrol or diesel car you will get good economy on a motorway at a constant 56mph, that is well established fact.

In an electric vehicle this will not be the case. They appear to offer best range when used at lower speeds and around town.

Is it? AIUI it's just an arbitrary figure
 

LostKiwi

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In a petrol or diesel car you will get good economy on a motorway at a constant 56mph, that is well established fact.

In an electric vehicle this will not be the case. They appear to offer best range when used at lower speeds and around town.
The 56mph thing is hogwash. Economy at speed is a combination of gear ratios, aerodynamics and engine efficiency. Maximum engine efficiency is at maximum torque (for an NA engine). The 56mph thing was an arbitrary speed chosen back in the 50s to give a way to compare relative economy of vehicles at a lower and higher cruising speed. It was a precursor to the modern economy results car manufacturers use today.
There are many modern cars that give better economy over 56mph than at 56.
People have always seen figures quoted in old brochures showing economy at 56 and 70 and since 56 was always better economy on cars of that era the myth began that 56mph was the most efficient speed, conveniently ignoring design variations across vehicles.

How would anyone expect the most fuel efficient speed of (say) a Bugatti Veyron and a Ford Ka to be the same at 56mph?
 

js190d

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Travelling at a constant speed of 56mph (or there abouts i accept that) , not accelerating & not braking will produce good mpg in a petrol or diesel car.

Harry Metcalfe does not think this is the case for an electric powered Jaguar i Pace (and he did work for JLR at one time). If you are correct that max engine efficiency is at maximum torque could this be the issue with electric power which is constantly at max torque and has no gears.
 

LostKiwi

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Travelling at a constant speed of 56mph (or there abouts i accept that) , not accelerating & not braking will produce good mpg in a petrol or diesel car.

Harry Metcalfe does not think this is the case for an electric powered Jaguar i Pace (and he did work for JLR at one time). If you are correct that max engine efficiency is at maximum torque could this be the issue with electric power which is constantly at max torque and has no gears.
Max torque on electric motors depends on the motor. Some will be max torque at zero rpm dropping linearly to zero at max no load rpm.
 

AnthonyUK

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Panasonic make the batteries for Tesla.

They did originally but the vast majority are coming from the Gigafactories for both car and storage use.
Panasonic are still heavily involved even within the Tesla factories though.
The model 3 and Y will use a Tesla standard cell size of 21700 rather than the industry standard sized 18650 in the model S and X.
 

davemercedes

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Just the same hypocrisy we’re used to receiving from our hard working politicians!
 

js190d

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They did originally but the vast majority are coming from the Gigafactories for both car and storage use.
Panasonic are still heavily involved even within the Tesla factories though.
The model 3 and Y will use a Tesla standard cell size of 21700 rather than the industry standard sized 18650 in the model S and X.
My understanding was that the Chinese sweat shop battery plant aka gigafactory is heavily funded by Panasonic. Old Elon never puts all his eggs in one basket.
 
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LostKiwi

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My understanding was that the Chinese sweat shop battery plant aka gigafactory is heavily funded by Panasonic. Old Elon never puts all his eggs in one basket.
Chinese sweatshop battery plant aka Gigafactory?

Gigafactory is in Nevada?
 

js190d

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I stand corrected you are right there is no Tesla factory in China and if there were the workers would enjoy the same standards of safety and employment rights that we in the West do.
 

umblecumbuz

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An electrifying thread that seems to have lost direction but is still producing sparks!

Cue puns.
 

range rover

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It does.
"He also said it was able to hit 60mph in 20.0sec when the trailer is fully loaded with 80,000lb (almost 36 tonnes) of cargo. This beats the average sprint time for diesel-powered rivals by around 40sec."
How much of the tyre would be left on the road? Not just trucks, rapid acceleration has a cost somewhere and it will surely be most noticeable in tyre life.
 
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