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Have EVs Reached A Short-Term Peak?

mdb-tpet said:
A 1000W is a friggin TON of power for a bicycle! I ride a prehistoric styled human only powered carbon fiber everything road bike all of the time, and I put out 250W max for long distances. 1000W is a full on max sprint for about 10 seconds for most super in shape riders. 33 mph on flat ground is no joke as well, as that's faster than almost most time trialists.

Just try not to run me over in the bike lanes...
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To get such bikes like that here in Brussels, you have to get a tag and specific insurance. Normal electric bikes have a governor set at 25 kmh (guessing +/- 16 mph) --meaning if you go over 25 kmh you are doing so with your own leg force or gravity and not electric assistance. My son is big into the Tour de France style bikes and biking but Mrs. Crimbru and I are normal electric and love it.
 
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One of the things that I love about my neighborhood is the convenience of having most everything at the town center a couple of miles from my house. It's a golf cart community with a dedicated lanes apart from automobile traffic. There are also plenty of walking trails. People have to drive to work, of course. But, at the town center is a Publix, a Greenwise, and a monthly farmer's market. There's the range of restaurants with more being built. My doctor, dentist, eye doctor, and an urgent care facility are there. The vet, dry cleaner, cell phone store, hardware store, and banks are there. Day care and elementary, middle, and high schools are in (or just outside) the community. There are gyms, water parks, and the whole range of outdoor recreational facilities. Outside of driving to/from work, I need my car rarely, if at all. It's a very pleasant way to live.
 
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Bazza said:
Coming home from work this afternoon I was behind this car and noticed the styling was much different than most I've seen.

Just looked it up and it's an EV. Looks like it runs from $45K to $53K depending on options and features.

Built in Alabama, right?

Hyundai Ioniq 5

View attachment 38419
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It's their only factory in the US...
 
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TIDE-HSV said:
It's their only factory in the US...
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they are building a mega-factory near savannah

www.savannahnow.com

Hyundai EV plant in Bryan County to be 3x size of Montgomery and other updates from SEDA

The Savannah JDA will conduct a housing study to access rooftop needs for the future.
www.savannahnow.com

Hyundai Motor Group and LG Energy Solution to Invest Additional $2B in Bryan County | Georgia.org

ATLANTA – August 31, 2023 – Governor Brian P. Kemp today announced that Hyundai Motor Group and LG Energy Solution (LGES) will invest an additional $2 billion in their battery cell manufacturing joint venture (JV) at [...]
www.georgia.org www.georgia.org
 
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92tide said:
our obsession with bigger is better plays a role in it too


American cars and trucks keep getting bigger — and new research suggests that additional height comes at a steep cost to safety.

Vehicles with higher front ends and blunt profiles are 45% more likely to cause fatalities in crashes with pedestrians than smaller cars and trucks, according to new research published Tuesday by the Insurance Institute for Highway Safety.

"We expected those vehicles to indeed create a higher risk of fatality for pedestrians," said David Harkey, the president of IIHS, in an interview. "But I don't know that we had those expectations that the number would be quite that high."
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And the only 'function' of these massive front ends is 'style'. They also come at a mpg cost with a higher COD.
 
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crimsonaudio said:
You'd likely be surprised - a modern Dodge Ram 1500 Quad-cab (giant truck) is more aerodynamic than a Ferrari F50 (0.357 Cd vs 0.372 Cd).
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Gotta link? I'm extremely skeptical and cannot find any info other than just the numbers.

Were these measured in the same wind tunnel? Are they dealer specs?

Is it because the Ferrari has to have downward air pressure to help cornering?

There's no way the front end of a truck is more aerodynamic than the front end of a boat (block vs wedge). It just doesn't make any sense in my mind. There's a reason the front of a fighter jet doesn't look like the front end of a truck.
 
Go Bama said:
Gotta link? I'm extremely skeptical and cannot find any info other than just the numbers.

Were these measured in the same wind tunnel? Are they dealer specs?

Is it because the Ferrari has to have downward air pressure to help cornering?

There's no way the front end of a truck is more aerodynamic than the front end of a boat (block vs wedge). It just doesn't make any sense in my mind. There's a reason the front of a fighter jet doesn't look like the front end of a truck.
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One of my chirruns is in aerospace and could explain to you why this is true, I can only go by the numbers. But there's a reason aerospace engineers are among the most sough-after - there aren't a ton of people who can handle the math involved in these calcuations (I'm one who cannot).

Modern vehicle aeodynamics are a massive concern amongst automakers, and drag coefficients are not as obvious as some things - I'm sure most people learned in elementary physics that the teardrop is the near perfect shape for drag coefficient (something like 0.04Cd), which is the opposite of what most sports cars have - yet a lot of modern trucks look a bit like that shape...

And comparing aerodynamics and fluiddynamics isn't going to get you anywhere - the frictions involved are far different, as are the compressabilities of the gases and fluids in the discussion.

But yes, it is true - most people don't believe that a Chevy Impala is more aeordynamic than an F1 car, but facts are facts.
 
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crimsonaudio said:
But yes, it is true - most people don't believe that a Chevy Impala is more aeordynamic than an F1 car, but facts are facts.
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I'm way outside my lane here. But is the Chevy Impala more aerodynamic because of the speed it travels is encountering air that is more movable? If you increase speed it would seem the air it approaches presents as a greater force, thus the need for more of a knifing body shape for F1 cars and fighter jets. There is a reason the G forces increase with speed.
 
JDCrimson said:
I'm way outside my lane here. But is the Chevy Impala more aerodynamic because of the speed it travels is encountering air that is more movable? If you increase speed it would seem the air it approaches presents as a greater force, thus the need for more of a knifing body shape for F1 cars and fighter jets. There is a reason the G forces increase with speed.
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No, it's the wheels in F1 - open wheels undo a vast majority of the body aerodynamics. Cd doesn't care about speed (at the speeds we're talking about wrt automobiles).

Downforce is an issue, yes, but far less than the open wheels. Without the downforce most modern cars (domestic in addition to sports cars) would indeed take off if given the some lift at the right speed. But if you see the tail fin on the COT used in Nascar, it's a very small amount of bodywork required to yield enough downforce to keep the car on the track.
 
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What's overlooked frequently is that the rear is as important as the front. The teardrop shape minimizes the vacuum created behind. I always chuckle when I see a pickup with the tailgate down. They increased the drag rather than ameliorated it...
 
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crimsonaudio said:
If I had any trust whatsoever for Memphis drivers I'd likely give a long look to a nice e-bike, but zero chance i'm riding a bike in traffic where the average IQ appears to be the equal of my shoe size.
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... I've been to Memphis many times ... surely your feet are bigger than that ... :p
 
Go Bama said:
Gotta link? I'm extremely skeptical and cannot find any info other than just the numbers.

Were these measured in the same wind tunnel? Are they dealer specs?

Is it because the Ferrari has to have downward air pressure to help cornering?

There's no way the front end of a truck is more aerodynamic than the front end of a boat (block vs wedge). It just doesn't make any sense in my mind. There's a reason the front of a fighter jet doesn't look like the front end of a truck.
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Yeah, the Ram is around .5
Vehicle Coefficient of Drag List - EcoModder Forum Wiki
 
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Bamaro said:
Yeah, the Ram is around .5
Vehicle Coefficient of Drag List - EcoModder Forum Wiki
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I had actually seen that list before responding to CA’s post. It doesn’t have the Ferrari’s Cd so I looked it up. Still boggles my mind.

The teardrop analogy and Earle’s post about the tailgate helped me understand.

You learn something new everyday.
 
Go Bama said:
I had actually seen that list before responding to CA’s post. It doesn’t have the Ferrari’s Cd so I looked it up. Still boggles my mind.

The teardrop analogy and Earle’s post about the tailgate helped me understand.

You learn something new everyday.
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That's the reason for spoilers. They break up the vacuum holding back the vehicle...
 
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