Hacker News Board Hacker News, browsed like a classic message board
Live data from Hacker News

New world record with an electric racing car: From 0 to 100 in 0.956 seconds

ethz.ch

Post reply on HN
Print view View original

131–140 of 307 posts

Re: New world record with an electric racing car: From 0 to 100 in 0.956 seconds

#131

Post by gregoriol »

londons_explore wrote: post #53
xnx wrote: post #23

Very cool, but also kind of impressive that a Tesla manages this in ~2.5 seconds while doing all the other stuff a production car does. What time would a Tesla get if you stripped out all the extra weight? (seats, glass, electronics, roof, etc. etc.) Video here (900 MB download): https://polybox.ethz.ch/index.php/s/uKWFRcBjtl4foEy/download... (couldn't find it on their YouTube page yet: https://www.youtube.com/@AMZFo…

I'm pretty sure a Tesla spends most of its 2.5 seconds traction limited. Ie. if you could fit gearwheels and drive on a toothed road, I think a stock tesla could accelerate faster.

Or burn, or cost three times the price! Most components used in Teslas are not made to run so intensively, wether it is the wheels, the motors, the battery, the brakes, ... they most likely limit the acceleration to prevent bad things.

Re: New world record with an electric racing car: From 0 to 100 in 0.956 seconds

#132

Post by sottol »

gambiting wrote: post #34
sottol wrote: post #5

Earlier quoted context omitted.

...and lithium fires. Unfortunately, I think there will be pearl clutching and new rules that allow gas/diesel powered vehicles only "due to safety", at least my guess.

.....the what now? Have you watched any drag strip racing, like, ever? Cars regularly go up in flames. The suggestion that normal ICE cars would be allowed over EVs for "safety" is actively hilarious.

Just the first example I could quickly find:

https://www.digitaltrends.com/cars/electric-cars-banned-from...

Or

https://www.yellowbullet.com/threads/evs-got-banned-from-rac...

And sounds like it's not for lithium fires only but also traction control.

Re: New world record with an electric racing car: From 0 to 100 in 0.956 seconds

#133

Post by lifeisstillgood »

One of the photos really brought something home to me. Where I would expect to see an axle or something to provide torque to wheels from the engine, there is just a yellow wire.

I know that's how electric cars work. But something about it in the racing car context just brings it home to me - electricity just works differently to all our other intuitions about the world. Factories used to have bands and axels taking power from one central steam engine to all corners of the building. And then they got redesigned once electricity came in.

I got a gut realisation from that photo that something similar is / has happened.

I like to emphasise using "boring tech" at work to avoid chasing too many rainbows. But sometimes there is a pot of gold and I need to remember that, else my factory will remain steam powered.

Re: New world record with an electric racing car: From 0 to 100 in 0.956 seconds

#134

Post by gladoskar »

enragedcacti wrote: post #120

I find the suspension design to be really interesting. It seems like the front wheels and the rear wheels each share a single coilover and they use hydraulic cylinders at each wheel to transmit the force. I'm sure this saves a lot of weight but I'm interested in how the suspension dynamics are changed by two independent wheels sharing the same spring and damper. Do any other vehicles do this? Are there are any other…

This is actually fairly common in Formula Student cars. They often use decoupled heave/roll suspension systems, where one spring/damper is for the heave of the entire axle and another one for the roll on the axle. It has some advantages over separate springs, but I'd have to ask our suspension guys.

The graphics in this article show its function fairly well, but don't explain the calculations either

https://www.marekdostal.com/suspension-design/

Recently, some teams have added the hydraulic relocation of dampers, and some (like Dresden) even have software control of them.

Re: New world record with an electric racing car: From 0 to 100 in 0.956 seconds

#135

Post by gladoskar »

no_wizard wrote: post #109
ihunter2839 wrote: post #14

Earlier quoted context omitted.

Yes, or maybe more accurately - we are the American equivalent of Formula SAE Germany. The German teams are significantly more advanced and better funded, with some of the teams running custom built electric inhub motors (something that's unheard of here in the US) I am currently on San Jose States Formula SAE team - we merged our electric and combustion teams last year to go all electric since it's where the stiffes…

I didn't know San Jose State had enough money to run an team like this. Unless I'm mistaken, aren't Formula teams expensive? the cars get rebuilt often, I imagine its no different with electric (less to rebuild, perhaps, but anything mechanical would need to be) Thats awesome though!

It's definitely expensive, and sponsor aquisition is always a success factor as in every racing league.

Re: New world record with an electric racing car: From 0 to 100 in 0.956 seconds

#136

Post by sottol »

mikeyouse wrote: post #26
athorax wrote: post #12

Earlier quoted context omitted.

I highly doubt this. It is already a pretty regular occurrence for ICE cars to combust on drag strips

Yeah.. if people think the prospect of a lithium fire is going to scare drag strips into banning them, even under 'false' pretenses, they haven't spent any time at a drag strip. Most drag strips are run by volunteers or extremely small hobbyist tracks and have almost no regard for safety. Basically if the driver is wearing a helmet (and a fire suit at more formal places) you can run it. To compete they'll often requi…

Maybe it's the traction control then

https://www.yellowbullet.com/threads/evs-got-banned-from-rac...

Re: New world record with an electric racing car: From 0 to 100 in 0.956 seconds

#137

Post by enragedcacti »

tsunamifury wrote: post #57

On a related note in the sports car community its been interesting to watch Acceleration stop being a mark of a performance car. There is even a lot of chatter around this being the end of the supercar segment since there are family wagons that can now do 2 second 0-60 runs. On top of that the speed is now too much for anyone to reasonably use off a drag strip or circuit. Now there is a huge emphasis on engagement, d…

> Now there is a huge emphasis on engagement, dynamics, and a bunch of vague "feelsomeness" as sports cars slowly become like horses.

I think this is mostly just the experience of people who only started caring about performance cars when EVs started being competitive. Porsche people (and many others) have been ranting about the engagement and driving dynamics for 50 years now. There are decades of arguments on forums about handling, 50/50 weight ratios, understeer and oversteer, shifter feel, track times, etc. in addition to arguing about straight line acceleration.

EV people feel like those things are just excuses because previously they only digested mainstream auto news which puts a massive emphasis on straight line acceleration.

Re: New world record with an electric racing car: From 0 to 100 in 0.956 seconds

#138

Post by itishappy »

js2 wrote: post #68

Impressive but for reference, about half the acceleration of a Top Fuel dragster, which are also still getting faster. Here's Brittany Force who holds the current records (fastest time, fastest speed): https://www.nhra.com/news/2022/brittany-force-sets-national-... 0 to 338.43 mph in 3.665 seconds over 1000 feet. (The cars got too fast for 1,320 feet and have been racing 1000 feet since 2008.)

Electric: 0-60mph in ~0.9s

Top Fuel: 0-60mph in ~0.4s

Wow.

Re: New world record with an electric racing car: From 0 to 100 in 0.956 seconds

#139

Post by semanticc »

js2 wrote: post #68

Impressive but for reference, about half the acceleration of a Top Fuel dragster, which are also still getting faster. Here's Brittany Force who holds the current records (fastest time, fastest speed): https://www.nhra.com/news/2022/brittany-force-sets-national-... 0 to 338.43 mph in 3.665 seconds over 1000 feet. (The cars got too fast for 1,320 feet and have been racing 1000 feet since 2008.)

I was sure you made a typo and meant 10000 feet, instead of 1000. But after checking, yeah, it makes sense to make the track shorter to avoid the cars reaching even more insane speeds.

Re: New world record with an electric racing car: From 0 to 100 in 0.956 seconds

#140

Post by snovv_crash »

jansan wrote: post #79
KerryJones wrote: post #37

The title should mention 100kmh, not mph

Or say it was done in Switzerland, that would make things clear, too.

The domain name is ethz.ch, even if you don't know about ETH Zürich the .ch will tell you it's Switzerland.
Post reply on HN