Everyone knows about how quick battery-powered devices are – because it’s the one appealing thing battery-powered devices can tout about themselves vs. other cars. It is not a stretch to say that quickness is the thing that’s been used to get people focused on as desirable rather than the undesirability of how long it takes to get a battery powered device going again once it has run out of charge.
But did you know that battery powered devices are slow?
Meaning, they are not very fast.
Yes, they accelerate quickly – initially. They tout super-quick 0-60 times. But they slow down remarkably after that.
Try it yourself and see.
Most EVs – including “performance” models – have top speeds in the neighborhood of 130 MPH, which isn’t very fast at all. A Prius is capable of going that fast; it just takes awhile to get going that fast. A four cylinder powered Camry is also that fast. Just about any late-model car is capable of going that fast.
It was no always so – chiefly because in the past most cars lacked the leverage (rather than the power) to go that fast. Very few of the V8 powered muscle cars of the ’60s and ’70s had top speeds much faster than 130 MPH – if they were able to go even that fast. Many of them were close to their maximum speed at around 115-120 MPH because of their gearing.
More finely, their lack of overdrive gearing.
The typical V8 powered muscle car had either a four speed manual transmission or a three speed automatic and neither of them had overdrive. Their top gear (fourth or third) had a 1:1 ratio, which meant that when paired up with an aggressive final drive ratio (the ring and pinion gear in the rear axle, which was typically something like 3.23 or even 4:11) you had a mechanically limited top speed that was not very fast. The engine would be at or near its redline at speeds a new Prius can achieve, even though the muscle car’s engine was twice or even three times as powerful.
A modern muscle car such as the recently force-retired (due to compliance pressures and corporate cowardice) Dodge Challenger could easily exceed 130 MPH because it had both the power and the gearing. Many modern luxury-sport sedans have top speeds of 155 MPH and could go faster. They are electronically limited to no faster than 155 – often because their manufacturers are worried about legal liability or because the cars are not equipped with high-speed tires rated to handle speeds faster than 155 MPH.
Battery-powered devices, on the other hand, are slowed down by their weight. The heavier a vehicle is, the harder it is to make it go fast. And battery-powered devices are much heavier than comparable in size cars.
A Tesla Model 3, for instance, is about the same size as a Toyota Prius. The latter is 181.1 inches long; the former is 185.8 inches long. But the only slightly longer Tesla weighs nearly 800 pounds more (3,891 lbs. vs. 3,097 lbs.). Most of that being the weight of the device’s much larger battery pack. An even less favorable – to the device – comparison would be vs. a small sedan such as the Honda Civic, which is also about the same size as the device (184.8 inches long, so almost exactly the same size) but weighs just 2,877 lbs. because the only battery it’s lugging around is the one that starts its engine.
And that one weighs about 50 lbs.
That’s why the Civic weighs 1,014 lbs. less than the Tesla 3 device and it’s why the Tesla 3 device isn’t any faster than the Civic – even though it is much quicker. They both “top out” at about 130 MPH even though the Tesla device is much more powerful. The Civic can get to 130 MPH with just 180 horsepower. The Tesla 3 needs 394 horsepower (dual motor set-up) to achieve the same speed – though it is much quicker getting to 60 (just over 4 seconds) than the Civic, which needs about 7.4 seconds to make the same run.
There are a few devices that are both quick and fast – such as the Tesla Model S Plaid. It has 1,020 horsepower – which is the kind of power needed to push 4,776 lbs. of battery powered device to 200 MPH. A Dodge Challenger Hellcat is just as fast but only needs 717 horsepower to go just as fast because it weighs only 4,430 lbs.
Put another way, the heavier you are, the slower you go.
There is no such thing as a free lunch, in other words – in physics or on the road!
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Another aspect of “slowness” of electric vehicles is the fueling operation.
ICE cars can be refueled in 5 minutes or less.
EV’s take more than a few minutes, possibly even HOURS to refuel.
If you want to go all electric, you’ll need nuclear power to make it happen.
I suppose you could build an electric car that has a nuclear powered engine. Somehow it could be done, have to investigate.
Can’t rule it out.
Have to control those gamma rays.
Locomotives built by General Electric’s Electro-Motive division have diesel-fueled engines that drive the locomotive with ease. Drop some silica sand in front of the steel wheels, the engine will go no matter what is being pulled behind the diesel-electric engine.
You don’t want to cut a divot into the 132 pound rail, sand provides the grip to get ‘er going.
What you call heavy metal.
I don’t know why I drive ’em like I do
You know a D10 can be the death of you
I can push Alaska all the way to Beirut
Push the Rocky Mountains into the sea
Heavy metal don’t mean rock’n roll to me – Guy Clark, Heavy Metal
I have no need to go 150 mph nor go 0-60 in 4 seconds. That may appeal to testosterone laden young men but not to old farts like me.
Old farts like me want cheap & reliable. EVs are neither.
Second that Mike, emphasis on reliable.
Besides that if an AGW catches you using that ‘ludicrous speed’ it will be very expensive, assuming he doesn’t just shoot you.
If we wait long enough, all the EV enviro-nazis will eliminate themselves in floods, hurricanes, and Commiefornia wildfires.
https://www.youtube.com/watch?v=AD4FDo9P1IE
‘If the net zero zealots get their way, even the fire trucks will be electrified.’ — MGUY
Oy vey! What happens when the fire truck catches fire, due to battery thermal runaway?
PhysicianFire truck, heal thyself! :-0Hi Jim,
The Net Zero zealots might already be asking how many of the fire trucks involved in fighting those fires in Southern California are electric. Considering the issues with EVs that we KNOW exist, any electric fire trucks there probably exploded, starting new fires, or they ran out of juice as quickly as the fire hydrants there ran out of water.
Though I feel bad about it, I’m unsympathetic towards the leftists in LA. I’ll treat them with the same contempt that they treated the people in western North Carolina.
Let’s see whether FEMA hands out $750 checks to the folks in Pacific Palisades … or $7,500 checks, owing to the higher cost of living in California.
My bet is on the latter outcome, if not even more.
Gotta take care of israel and ukraine first…
Hi Jim. Don’t forget that $750 was considered a loan and does have to be paid back, or at least that was multiple reliable sources on the interweb said.
I always figured a gear box behind the electric motor might have helped it go faster but I guess the extra weight is the bigger limiting factor.
On ZeroHedge yesterday was an article talking about an EV car chase in Den of Thieves 2. Based on the picture it appears that the “bullets” can’t penetrate the body, unlikely at best. It might be a more interesting movie if the batteries immolate after the bullets hit them though.
https://www.zerohedge.com/technology/hollywood-goes-green-first-ever-ev-car-chase-scene-tactical-gun-battle
In the off topic corner.
Powering a Car With An Impact Wrench
https://youtu.be/WpTddcAE1Ts
Porsche has a 2 speed transmission on their EV…so does Audi….
The problem is the huge torque….it breaks existing transmissions….stronger transmissions for EV’ are coming…..
A multi speed transmission would make EV’s more efficient……and faster….
‘the heavier you are, the slower you go.’ — eric
Hagerty (and I) beg to differ:
‘Adding extra weight to your car will slow acceleration, but won’t reduce its top speed. In determining a car’s top speed, its engine battles two main forces: rolling resistance and aerodynamic drag.
‘At very high speeds, air resistance makes up the vast majority of the overall drag on your car. So much so that an increase in rolling resistance from extra weight is likely negligible.
‘Adding weight may increase your car’s rolling resistance, but it’s also usually offset by a decrease in wind resistance because the weight compresses the suspension, which in turn decreases the car’s frontal area and, typically, its drag coefficient too.
‘So in some cases, your car may be even faster when fully loaded — at least on level ground. The extra weight will increase top speed going downhill, but decrease it going uphill.’
https://tinyurl.com/3747ezmn
Air resistance increases proportionally to the square of the speed; however, because power is calculated as force multiplied by velocity, the power needed to overcome air resistance scales with the cube of the speed.
Rolling resistance has a velocity squared component, as well as a constant value. So air resistance, as a cubic function, will dominate rolling resistance at higher speeds, to the point of rendering it almost insignificant.
“ Adding extra weight to your car will slow acceleration, but won’t reduce its top speed. In determining a car’s top speed, its engine battles two main forces: rolling resistance and aerodynamic drag.
‘At very high speeds, air resistance makes up the vast majority of the overall drag on your car. ”
Absolutely Correct !!
But you also missed the other important factor that limits EV top speed. It’s the fact that EVs are direct drive and that in order to spin the motor faster, the torque output of the electric motor must decrease otherwise Back EMF limits motor speed when high torque is being developed by flowing high current through the electric motor.
“Field-weakening or flux-weakening is a technique for increasing the speed of an electric motor above its rating at the expense of reduced torque. Field-weakening is used for motor control in automation applications and traction motor control for electric vehicles and locomotives to achieve higher motor speed when lower torque is acceptable.
The permanent magnet synchronous motor (PMSM) is popular in these applications because of its high power density, high speed, and fast dynamic response. However, PMSM speed is limited when the stator terminal voltage reaches the inverter output limit. Therefore, a PMSM requires field-weakening to increase its shaft speed above its design rating.”
[Description of electric motor field weakening lifted from Mathworks (Matlab/Simulimk) site. ]
Sure you could use a gearbox to bring electric motor speed down but then it would require more torque, more current from the battery and the power electronics. Neither is designed to supply maximum current for more than a couple seconds at a time when the car is launched from a standstill. Trying to deliver maximum current for an extended period of time during a high speed run would require more cooling of batteries, wiring, and power electronics than is currently possible.
Welcome to the trade offs of an EV.
Yes … the practical limit on electric motor speed is analogous to the non-overdrive muscle cars mentioned by Eric, in which the engine’s rpm redline effectively set the top speed, despite plenty of power on tap to move the car faster with an overdrive gear ratio.
Battery cars are far too heavy…ice cars are superior…can be light and quick/fast….
@ 22:62 in video….Lillehammer HillClimb race…..quickest time…..Ford Fiesta with 1026 HP Volvo 5 cylinder turbo engine 2200 lb….will beat any battery car anywhere….
1026 HP…2200 lb….when you get down near 2 lb to the HP….the car is very, very quick…..
New GT3 race cars 2600 lb….600 HP….4.3 lb to the HP….
https://www.youtube.com/watch?v=vz7rIjK1fMU
Excellent points Eric,
You just can’t overcome the laws of physics, not even if your name is Elon Musk. However, I would point out to you that the defenders of EV devices tend to be agenda and emotion driven so pointing out the flaws in their arguments tends to fall on deaf ears. Also, pointing out that the “success” of EV devices depends on coercive force falls on deaf ears.
The market will take care of this mess…..unfortunately we in the U.S.S.A. will suffer consequences of these and other actions by AGWs as you correctly label them.
Trump can’t save the government mess, even were he so inclined which he apparently is not. Still, the wheels coming off should be interesting…..may Crom have mercy on us!
P.S. If the shit does not hit the fan by June, I hope to see you either on the way to or from Porcfest…..it’s a hoot.
Roger that, Giuseppe!
We are bracing for another “Snowpocalypse”… which for us means 1-3 inches maybe and some cold weather. I still haven’t had time to sort out the generator or get the heater core in the truck…
Hi Eric, can anyone loan you a properly working generator? That way you’ll have a better idea where to start looking first. On the upside aren’t you testing a VW now; so at least you’ll have a car that should work in the snow and cold.