19 ms·
New world record with an electric racing car: From 0 to 100 in 0.956 seconds
- mydriasis 3y agoNow _that_ is hot rodding. Can't wait to see what the drag strip looks like in ten years!
- eimrine 3y ago8-wheels or more and tons of batteries
- sottol 3y ago...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.
- poniko 3y agoIn ten years it's all going to be solid state, no more fires.
- athorax 3y agoI highly doubt this. It is already a pretty regular occurrence for ICE cars to combust on drag strips
- mikeyouse 3y agoYeah.. 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 require roll cages but most pulls are just against the clock so on many nights they let any random joe schmo pull up and get a time. The crowd often line the lanes behind small concrete barriers and people are usually welcome in the staging area and right up next to the burnout boxes.. Explosions and fires are common, as are crashes. https://youtu.be/O7P_2voFMRE?t=35 https://youtu.be/O7P_2voFMRE?t=35 https://youtu.be/QeIwAJK3iBg?t=128 https://youtu.be/QeIwAJK3iBg?t=128
- sottol 3y agoMaybe it's the traction control then https://www.yellowbullet.com/threads/evs-got-banned-from-racing.2686835/page-2 https://www.yellowbullet.com/threads/evs-got-banned-from-rac...
- gambiting 3y ago.....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.
- trashtester 3y agoI think you missed the point. For a petrolhead, a lithium fire is like a nuclear fire for a Green Part voter in Germany.
- sottol 3y agoJust the first example I could quickly find: https://www.digitaltrends.com/cars/electric-cars-banned-from-texas-motor-speedways-drag-strip/ https://www.digitaltrends.com/cars/electric-cars-banned-from... Or https://www.yellowbullet.com/threads/evs-got-banned-from-racing.2686835/page-2 https://www.yellowbullet.com/threads/evs-got-banned-from-rac... And sounds like it's not for lithium fires only but also traction control.
- josephcsible 3y agoYes, we all know that. The problem is that some people make ridiculous anti-EV "safety" rules anyway.
- orangepurple 3y agoDrag racers used to use hydrazine which would slowly convert into a contact explosive when mixed with gasoline. The exhaust flames were green. If the carburetor and fuel tank was not purged fast enough after a race the engine, carb, and/or fuel tank would explode and sometimes kill people. I doubt drag racers or venues are scared of lithium.
- jansan 3y agoRemember the six wheeled Tyrrell P34 F1 racing car? Admittedly, ony the rear axis was driven, but that was one badass car (and it won a Grand Prix). https://en.wikipedia.org/wiki/Tyrrell_P34 https://en.wikipedia.org/wiki/Tyrrell_P34
- cromulent 3y agoYeah it was unforgettable. Also the Williams FW08B, but that was banned before racing. https://www.motorsport.com/f1/news/six-wheeled-formula-one-williams/3196737/ https://www.motorsport.com/f1/news/six-wheeled-formula-one-w...
- deleted 3y ago[deleted]
- adolph 3y agoI was thinking the same. It is interesting to think of different fuel modalities. Liquid fuels seem to have a throughput advantage for now. The article doesn't seem go into electrical depth. From the pictures, it looks like they are powering all four wheels at the hub. This articles says" The vehicle weighs just 140 kilograms and has an output of 326hp." https://www.swissinfo.ch/eng/swiss-students-break-world-record-with-self-built-electric-car/48805720 https://www.swissinfo.ch/eng/swiss-students-break-world-reco... A top fuel dragster accelerates from a standstill to 100 mph (160.9 km/h) in as little as 0.8 seconds (less than one third the time required by a production Porsche 911 Turbo to reach 60 mph (96.6 km/h))[1] and can exceed 297 mph (478.0 km/h) in just 660 feet (201.2 m). This subjects the driver to an average acceleration of about 4.0 g0 (39 m/s2) over the duration of the race and with a peak of over 5.6 g0 (55 m/s2). https://en.wikipedia.org/wiki/Top_Fuel https://en.wikipedia.org/wiki/Top_Fuel
- elmerfud 3y agoThe impressive thing to me is the level of traction needed to do something like this. It seems they're taking old tricks and building a "sucker car". https://www.roadandtrack.com/motorsports/a32350/jim-hall-chaparral-2j-history/ https://www.roadandtrack.com/motorsports/a32350/jim-hall-cha... Still neat stuff. Race sanctioning bodies will need to update their rules or these will just be one off bragging rights.
- radicalbyte 3y agoIn Micromouse (https://en.wikipedia.org/wiki/Micromouse https://en.wikipedia.org/wiki/Micromouse) - a competition where autonomous devices solve a mouse maze - the fastest competitors are all using fans to increase traction (and thus speed).
- underlines 3y agoradicalbyte, you're absolutely right that the use of fans in Micromouse increases the traction, and therefore the speed at which the maze is solved. Suction allows for impressive performances. However, a small caveat that might be worth considering is that while the suction indeed increases speed, it might be more accurate to say that it primarily improves acceleration instead of car speed: The issue often lies with achieving rapid acceleration rather than with maintaining high speed. Even systems with relatively low traction can reach high speeds given enough time and distance, but the ability to accelerate quickly is crucial in competitions like Micromouse.
- HPsquared 3y agoSpeed = ∫(acceleration) dt
- anikan_vader 3y agoSure, but once you have speed you can use aerodynamics to get grip (e.g., F1 cars). So this is really only relevant if you need acceleration from low speed.
- btbuildem 3y agoThat's almost 3Gs of acceleration. Impressive!
- rob74 3y agoThanks! I was about to ask how many Gs this translates too, my physics are a bit rusty...
- mrb 3y agoIn GNU units you can just do: $ units -t '100 kph / (.956s) / gravity' 2.9629132
- world2vec 3y agoTIL!
- rjmunro 3y agoThat query works in Wolfram Alpha too: https://www.wolframalpha.com/input?i=100+kph+%2F+%28.956s%29+%2F+gravity https://www.wolframalpha.com/input?i=100+kph+%2F+%28.956s%29...
- lucgommans 3y agoRather than teaching a separate utility, I would recommend qalc which has unit conversions built in :) $ qalc -t 100km/h / 0.956s to gee 2.9629132 gees (where -t is for terse mode; by default it expands unit abbreviations and adds parentheses so you see whether it did what you wanted) The reason I recommend it is because it does so much more, I really love this utility since discovering it about a year ago. Example of using time notation combined with uncertainty and unit conversion: > (18:41 - 09:00+/-00:30) hours * 250 W to kWh (((1121 / 60) - (9±0.5)) * hour) * (250 * watt) = approx. (2.4208333±0.125) kW*h
- chungy 3y agoThe irony of advocating against a "separate utility", and then promoting a separate utility...
- elromulous 3y agoIs this for some kind of [European?] [electric?] Formula SAE equivalent? I took part in formula SAE ~20 years ago! Some of the first and most rewarding engineering work I've done.
- ihunter2839 3y agoYes, 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 stiffest competition exists. If we could secure sponsorships we'd love to take our car to Germany!
- consp 3y agoFormula Student Germany has been leading the rules for the electric and driverless since their inception. There is a meeting every few years at the FSG event to align some rules for the different global student competitions. There was one this year again. (Source: I'm in the timekeeping team/organisation, to the driverless cars: please stop destroying our gear)
- no_wizard 3y agoI 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!
- gladoskar 3y agoIt's definitely expensive, and sponsor aquisition is always a success factor as in every racing league.
- thedrbrian 3y agoYes but you ignore the bit where you're making a car affordable to the common man
- hprotagonist 3y agohow many gees is that?
- nickcw 3y agoPython says this for 0 to 100 kph in 0.956s >>> 100*1000/3600/0.956/9.81 2.961901417494933 So just about 3 standard Earth gravities! This assumes uniform acceleration which isn't likely so that is the average.
- mherrmann 3y ago3, as in "omg".
- tzot 3y ago$ units You have: 100 km per hour / 0.956 sec You want: gravity * 2.9629132 / 0.33750567
- lucgommans 3y agoProtip: no need for a dedicated unit conversions utility, this awesome calculator has it built in: $ apt install qalc $ qalc > 100 km/h / 0.956 s to gee (100 * (kilometer / hour)) / (0.956 * second) = approx. 2.9629132 gees
- tzot 3y agoThe word “dedicated” does not correspond to verifiable facts, since `units` can do dimensionless / unitless calculations just fine; it is already a calculator with units built-in, and the example you provided only intensifies the impression that `qalc` and `units` are equivalent. IMO a proper pro-tip for `qalc` would need an explanation why one should prefer it over `units`.
- BizarroLand 3y agoAbout 2.96gs. Using https://rechneronline.de/g-acceleration/ https://rechneronline.de/g-acceleration/, going from 0 to 100 km/h in .956 seconds says it is 2.96gs of acceleration.
- jasonjmcghee 3y ago100 km/h, to remove any ambiguity
- KingOfCoders 3y agoThanks, my first thought was 100x the airspeed velocity of an unladen swallow.
- deleted 3y ago[deleted]
- rob74 3y agoYeah, "0 to 100" is so commonplace in Europe that even the engineers from ETH Zurich leave out the units. Reminds me of being asked in the US what the fuel consumption of our car was (in miles per gallon) and not being able to answer because the usual unit in Europe is liters per 100 km (didn't have a smartphone back then).
- chungy 3y ago"0 to 60" is likewise so common place in America that we often leave out the units (mph). It's probably obvious enough in the car context which unit is being talked about, between 0-60 and 0-100.
- tromp 3y agoParticularly impressive considering the previous record stood at 1.461 seconds! Few records get broken by such a huge margin...
- xnx 3y agoVery 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?path=%2F&files=Rekordversuch%20Video_V3%20ohne%20musik.mp4 https://polybox.ethz.ch/index.php/s/uKWFRcBjtl4foEy/download... (couldn't find it on their YouTube page yet: https://www.youtube.com/@AMZFormulaStudent/videos https://www.youtube.com/@AMZFormulaStudent/videos)
- tw04 3y ago>What time would a Tesla get if you striped out all the extra weight? (seats, glass, electronics, roof, etc. etc.) That's been done - you don't actually want to remove things like glass because the aerodynamic efficiency loss doesn't outweigh the weight removal. https://www.youtube.com/watch?v=ywvGbus3yxo https://www.youtube.com/watch?v=ywvGbus3yxo
- expertentipp 3y agoHow many football fields of acceleration is this?
- csours 3y ago> "To ensure strong traction right from the start, the AMZ team has developed a kind of vacuum cleaner that holds the vehicle down to the ground by suction." Traction is now the limiting factor, so better acceleration results will be driven (hah) by better traction.
- TremendousJudge 3y agoA similar thing was done in F1 in 1978: https://en.wikipedia.org/wiki/Brabham_BT46 https://en.wikipedia.org/wiki/Brabham_BT46 It was swiftly banned of course, since it worked too well.
- JKCalhoun 3y agoOr not well enough? These cars would appear to be utterly dependent on maintaining a very specific distance from the track for the ability to stay grounded. You imagine going into a curve at high speed and the slightest body roll or debris on the track that might kick the car up an inch or so would break the suction and send the car flipping like a pancake.
- crote 3y agoSomething like that happened in the 1999 Le Mans to Mercedes[0]. It happened three times that race weekend before they decided to retire their last remaining car. [0]: https://www.youtube.com/watch?v=e21ZjwZGjiQ https://www.youtube.com/watch?v=e21ZjwZGjiQ
- TremendousJudge 3y agoThat is an issue with all ground-effect cars, not specific to fan cars, which is why they were banned, but that happened much later. The fan car was banned because it gave Brabham an unfair advantage and the other teams didn't like it.
- ActorNightly 3y agoTraction has always been the limiting factor in automotive performance. There is a reason why a Civic Type R set a faster time than exotic cars of early 2010s, and thats because modern street tire compounds are as grippy as slick racing tires from those years. And now, race tires have a static friction coefficient greater than 1, because when warmed up they actually glue themselves to the road.
- KerryJones 3y agoThe title should mention 100kmh, not mph
- jansan 3y agoOr say it was done in Switzerland, that would make things clear, too.
- Symbiote 3y agoIt does, the domain shown after the title is eth.ch.
- deleted 3y ago[deleted]
- snovv_crash 3y agoThe domain name is ethz.ch, even if you don't know about ETH Zürich the .ch will tell you it's Switzerland.
- shric 3y ago98% of countries use kph for vehicle speeds, also 0-100kph is a very common benchmark. If it was 0-60 I might assume mph.
- jonstewart 3y agoSure, but it doesn't hurt to put kph in the title. I assumed it was mph.
- cogman10 3y agoCould we maybe change the title here and change it to 100mph? I realize this is the original article title but EV + 0 to 100 led me to believe the article was talking about battery charging speed.
- sh1mmer 3y agoIt’s 100kph
- beAbU 3y ago0 to 100% fully charged in less than one second?
- LanceH 3y agoThat sounds a lot more dangerous than 0 to 100km/h.
- trashtester 3y agoIt sounds like a capacitor.
- pizzafeelsright 3y agoNah, this thing is electrical. And in order to get that kind of power you're going to need plutonium.
- tekla 3y agoWho the hell would think that a 1s battery charging time with a racing car would make any sense at all?
- hedora 3y agoPit stop times matter, and supercapacitors exist. I'd love to watch that race, especially if the cars were sucker cars like the one in the article, and the drivers got to wear high-G fighter jet suits. The best supercapacitors apparently have 20x the energy density of the best batteries. Apparently, self-discharge can be as low as 20% per day, which rounds to zero for racing. They only cost 10x more than lithium batteries, which again, for racing rounds to zero. Discharge current blows lithium-ion so far out of the water that I couldn't find a rule of thumb ratio. https://supercaptech.com/battery-vs-supercapacitor/ https://supercaptech.com/battery-vs-supercapacitor/ edit: I had the energy density backwards; supercapacitors are at 10% the density of lithium ion. Still, the other advantages stand. I wonder how hard it would be to add an inductive charger to a straightaway...
- mattferderer 3y agoOut of curiosity, what's the point of a driver in something like this besides to have a human in the vehicle adding weight? Are they doing much? Serious & maybe very ignorant question. - Edit - For clarification, my reason for asking was due to this occurring in less than 1 second. I don't understand what the driver does as I'm assuming they have no gears to shift or turns to make.
- lazide 3y agoRaises the stakes, provides a degree of accountability. Otherwise it’s just a missle with a required degree of ground contact, no?
- xwowsersx 3y agoI assume it's because racing, as a sport, is a lot less interesting without the variable of a human with particular skills operating the vehicle. I doubt crowds would be as interested in watching cars race on autopilot, though it'd still be kind of cool, I guess.
- madamelic 3y ago> racing, as a sport, is a lot less interesting without the variable of a human with particular skills operating the vehicle. If full self-driving gets much better, I think it could be fun to see this happen. It would be like a hackathon with teams swapping out and improving on strategies through laps. The qualifiers could happen on electric miniatures then the final round would get a full car to race on a track.
- dpkirchner 3y agoI think a fully automated battlebots arena might be more fun but I'd still watch track racing.
- gladoskar 3y agoThe racing formula this is from, Formula Student, actually has a driverless competition as part of it. It's pretty fun, but also harder than one would think, still.
- hersko 3y ago100kmh, not mph.
- tsunamifury 3y agoOn 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, dynamics, and a bunch of vague "feelsomeness" as sports cars slowly become like horses. The march of time is interesting...
- deleted 3y ago[deleted]
- jansan 3y agoAcceleration was never really the top metric for super cars. It was more performance at high speeds, with high end cars like the Bugatti Chiron Supersport 300+ going up to 489 kmph (that is a lot in case you wonder). Part of the super car segment will go electric, that is for sure, but I do not see the end of the super car. Look at luxury watches. They are booming despite a Casio GShock with Multiband beating the shit out of them in terms of accuracy.
- tsunamifury 3y agoSuper car segment is well below Bugatti. Thats a 2.5 million dollar car. Super cars are between 150k usedish and a million. Plus a lot of other vague definitions. Most people say call the 911 the dividing line of a supercar and top of the sports car range. In general this segment is dying off, chasis are being reused for 10+ years in the market, tons and tons of special edition and reissues. most of the new work is being done in the Hypercar segment which is almost just a nonsensical money-fight space. And they were, for the most part, defined by speed in the public eye. If you wanted feelsome-ness you just go a Cayman or a Lotus.
- jansan 3y agoI stand corrected, the Bugatti is a hypercar. It's a bit embarrassing considering that I was in the workshop where they make the Bugatti engines just a few weeks ago. Awesome experience btw, seems to be part of the standard factory tour at Volkswagen Salzgitter currently.
- 11235813213455 3y agoif it was 100m in that time, it would be almost exactly 10 times faster than Usain Bolt
- js2 3y agoImpressive 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-record-fastest-top-fuel-run-history-33848-mph 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.)
- bluedino 3y ago8G's max acceleration and -6G when they hit the brakes (using a parachute) 11,000hp!
- KennyBlanken 3y agoThe dragsters need to have a complete engine tear-down after nearly every run, regularly explode in a giant ball of flame, etc.
- 93po 3y agoI thought maybe this was a superficial tear-down but nope, it's a whole heckin teardown and measurement of components and relubing and cleaning and etc. https://www.youtube.com/watch?v=I1RYmUxUqso https://www.youtube.com/watch?v=I1RYmUxUqso Also the end of this video gives an awesome perspective that really shows the insane speed of these cars.
- itishappy 3y agoThey pulled some type of rotary pump thingy out of that monster that ran the entire length of the engine. I'd never seen anything like that and had to look it up. It's a supercharger; a glorified air compressor. That air pump uses more HP than your average supercar. Holy hell.
- SoftTalker 3y agoThey also blow a lot of that power out of the exhaust pipe. I bet in terms of efficiency per km/h/s the electic go-kart wins.
- londons_explore 3y agoI think hub motors like this are the future. Frees up space under the car for more battery. Removes the complexity of drive shafts and universal joints. Gives software full traction control. Reduces design time for new vehicles (just route a power and data cable to a wheel and you have a vehicle). Is the first step to all-electric braking. The downside is more unsprung mass. But modern motors are getting lighter and lighter. And without a drive shaft, wheels could do crazy things like moving in and out to avoid potholes, or dynamically adjust camber to match the road you're on.
- namdnay 3y agoModern motors get lighter in part because they can offer lower torque with a smaller rotor but compensate with higher rpm. That’s not possible for a hub motor
- spixy 3y agoCan you compensate smaller rotor with larger stator (magnet), so rpm could stay the same? And why you cannot have small hub motor with high voltage (kilovolts) and very high rpm?
- invalidator 3y agoTorque is directly proportional to radius, all other factors being equal. There are practical limits on the strength of the magnetic force because you can only cram so many amps through a confined space, which is even more confined on a small motor. It will still make high power at high RPMs, but you have to gear it down to convert that power into more torque at low speeds. A gearbox makes it not really a Hub Motor at all any more. Terminology aside, a gearbox also adds even more weight and complexity inside the wheel. For less weight and complexity you can use a half-shaft to the center of the vehicle and use whatever motor you want inboard.
- The_Double 3y agoThe hub motors on the car in the OP run at ~24k RPM (faster than any production electric car AFAIK) and have a multistage planetary gearbox for reduction. Pretty much all top Formula Student cars now use hub motors. Mainly for packaging reasons. Putting the motor in the unused space in the wheel means you can make a smaller chassis and have more space for wings and underbody aero.
- pcurve 3y agoFor those wondering it’s g force of 2.95G.
- rfwhyte 3y agoI was expecting be disappointed when it was some kind of RC or slot car type thing, but for a vehicle an actual human person fits inside and controls, this is epically awesome.
- omginternets 3y agoJesus, do you need a G-suit??
- rgmerk 3y agoNah, impressive as it is, if you’ve ever ridden a roller coaster you’ll have experienced forces greater than this.
- CodeL 3y ago[flagged]
- briandear 3y agoA Ducati MotoGP bike does it in 2.3 seconds just as a point of reference.
- enragedcacti 3y agoI 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 applications where it would make sense?
- gladoskar 3y agoThis 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/ 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.
- onnnon 3y agoYou can watch the video on ETH Zurich's YouTube channel: https://www.youtube.com/watch?v=mvoFemftA34 https://www.youtube.com/watch?v=mvoFemftA34
- lifeisstillgood 3y agoOne 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.
- 1-more 3y ago> Factories used to have bands and axels taking power from one central steam engine to all corners of the building. From my own experience: a popular home woodworker tool from the middle of the 20th century is a Shop Smith. It had a motor that you would couple to the various mounted attachments to run the lathe or the band saw or the table saw etc one tool at a time. I guess part of the appeal was certainly the size savings, but I have to think it was also only having to buy one electric motor. Life changingly good motors are now commodity parts, and artisanally crafted ones are setting acceleration world records. Cool time to be alive.
- munificent 3y agoTractors, still widely used today, as essentially a mobile version of this. One of the main purposes of a tractor, compared to other farm vehicles, is that it has a power take-off [0] to enable the engine to drive other farm implements like combines. [0]: https://en.wikipedia.org/wiki/Power_take-off https://en.wikipedia.org/wiki/Power_take-off
- pests 3y agoI've never actually thought about what a tractor actually is. I've seen them in use and could roughly describe one but its actual purpose or intent was unknown to me until now.
- alwaysrunning 3y agoAs someone who grew up racing go karts and still enjoys motor sports (mostly F1), the problem I have with e-racing is the lack of sound. The winding noise they make just isn't adequate and really puts me off to the racing.
- chrsig 3y agoI'm sure there's some equivalent of putting a playing card into the spokes
- semi-extrinsic 3y agoStraight cut gears in the transfer case.
- onychomys 3y agoOn the other hand, the Formula-E cars sound exactly like TIE Fighters, and that's awesome.
- alwaysrunning 3y agoVery true.
- mrob 3y agoInteresting that they went with an open-cockpit design. I'd have thought closed cockpit would be faster because of better aerodynamics, even at these relatively low speeds. Any idea why this was chosen?
- kukkamario 3y agoI'm guessing weight is more important than aerodynamics if target is 0-100km/h.
- Saturn5 3y agoThis is the typical design for the competition this car was originally build for. The rules of Formula Student require an open cockpit with a hoop, and you have to demonstrate that your driver is able to egress within 2(?) seconds if I remember correctly. This record was set with a modified version the car they competed with last season.
- queuebert 3y agoWeird, I was not expecting it to be basically a Formula SAE car.
- chrisweekly 3y agoIt shouldn't matter, but I'm personally delighted that the driver was female.
- moonchrome 3y agoDid you just assume their gender ?
- chrisweekly 3y agoNo. Her name is Kate, and there's a photograph.
- Biganon 3y agoOh looks this brilliant joke is now on HN as well, great
- trtrtt 3y agoShe's not a troon.
- WirelessGigabit 3y agoInteresting video from Engineering Explained on the impact of grip on acceleration: https://www.youtube.com/watch?v=i7yigpPSu_o https://www.youtube.com/watch?v=i7yigpPSu_o
- diziet 3y agoI am curious what sort of physical preparation the driver (Kate Maggetti) did to train for these runs, if any? Surprisingly the average g-force is just under 3 g.
- deleted 3y ago[deleted]
- tim333 3y agoNot sure but it's fairly mild compared to what I think is the fastest accelerating car, Sammy Miller's Vanishing point which I think recorded 26g. They had some failsafe to stop the car if he passed out on that one. (car doing a 3.22 quarter https://youtu.be/7QC6tymIvKA?t=213 https://youtu.be/7QC6tymIvKA?t=213)
- jcampbell1 3y agoFrom my FSAE days, she is likely the lightest engineer on the team. It was standard for the lightest team member to do the acceleration runs. The car is about 300lbs so it makes a difference.
- froj 3y ago3g for less than a second is really not to that much. Most people can easily withstand 3g sustained for minutes with (almost) no preparation. Just don't forget to breathe and maybe contract your leg muscles a bit. Many can go up to 7g sustained with half a day of training. [1] https://gforce.ch/ https://gforce.ch/
- sova 3y agokm/h
- pedalpete 3y agoI was wondering how this compared to motorcycles, and didn't realize that today's production motorcycles are not significantly faster than modern hypercars, the fastest motocycle clocking in at 2.2 seconds [1] Ignoring the million dollar sports cars, other cars such as Porsche 911 turbo s from 2020 is 2.1s.[2]. I know, Tesla and Lucid, etc are also crazy fast, but I believe their quoted 0-60 times are all with a roll-out. [1]https://en.wikipedia.org/wiki/List_of_fastest_production_motorcycles_by_acceleration https://en.wikipedia.org/wiki/List_of_fastest_production_mot... [2]https://en.wikipedia.org/wiki/List_of_fastest_production_cars_by_acceleration https://en.wikipedia.org/wiki/List_of_fastest_production_car...
- tstrimple 3y agoCars designed for high speed will have a significant advantage over a motorcycle through capturing down forces to dramatically increase the amount of friction between the tires and the surface before losing grip and spinning out. Motorcycles can own the power to weight ratio category, but they can't use all that power because at that point the wheels just spin. I found it super interesting when I learned that one of the biggest advances in maze solving races is that someone ended up putting a fan in their little "mouse" to push down so the wheels could get more traction. https://hackaday.com/2008/11/26/vacuum-micromouse/ https://hackaday.com/2008/11/26/vacuum-micromouse/ More details on maze racing from Veritasium: https://www.youtube.com/watch?v=ZMQbHMgK2rw https://www.youtube.com/watch?v=ZMQbHMgK2rw
- bluedino 3y agoMotoGP bike vs Rimac Nevera https://youtu.be/_3868Dnogrk?si=o4rkjjOcdHIBSbMt https://youtu.be/_3868Dnogrk?si=o4rkjjOcdHIBSbMt
- michaelteter 3y agoI have watched a lot of car acceleration tests on YouTube (thanks COVID)... and the electric vehicles, especially the ones with artificial (vacuum) downforce) are approaching what seem like impossible limits. For the lesser trained drivers, the acceleration forces experienced appear to temporarily affect some basic functions (like speaking). However, these perhaps pale in comparison to the repeated acceleration and deceleration tests experienced by John Stapp - https://en.wikipedia.org/wiki/John_Stapp https://en.wikipedia.org/wiki/John_Stapp I cannot find information about his 1-second speed (trap) number, but the Wikipedia article notes that on "3 January 1955 says he accelerated to 632 mph (1,017 km/h) in five seconds and 2,800 feet (850 m), then coasted for half a second, then slowed to a stop in 1.4 seconds. It says the track was 3,500 feet (1,100 m) long."
- AlbertCory 3y agoAnyone have an estimate of the G forces the driver experienced?
- kQq9oHeAz6wLLS 3y agoThat's what I want to know. The article was sadly lacking.
- gnicholas 3y ago> “But power isn’t the only thing that matters when it comes to setting an acceleration record – effectively transferring that power to the ground is also key,” says Dario Messerli, head of aerodynamics at AMZ. Conventional Formula One cars solve this through aerodynamics: a rear or front wing pushes the car to the ground. However, this effect only comes into play when the car has reached a certain speed. To ensure strong traction right from the start, the AMZ team has developed a kind of vacuum cleaner that holds the vehicle down to the ground by suction. Kind of hilarious. EDIT: why the downvotes? Isn't it at least somewhat funny that this being characterized as a "vacuum cleaner", given that there's no "cleaning" going on?
- alpineidyll3 3y agoAt what point is an electric vehicle just rolled-up railgun ;p
- peter_d_sherman 3y ago>"All of mythen’s components, from the printed circuit boards (PCBs) to the chassis and the battery, were developed by the students themselves and optimised for their function. Thanks to the use of lightweight carbon and aluminium honeycomb, the race car weighs in at only around 140 kilos (309 pounds)." Never knew about Aluminum Honeycomb -- before reading this article... Let's do some quick Google searches for it: https://www.google.com/search?&q=aluminum+honeycomb&tbm=isch https://www.google.com/search?&q=aluminum+honeycomb&tbm=isch https://www.google.com/search?q=aluminum+honeycomb https://www.google.com/search?q=aluminum+honeycomb Yup, apparently "it's a thing"... :-) >"People also ask What is Aluminum Honeycomb used for? Aluminium Honeycomb - CEL Components - As core material, aluminium honeycomb is used in sandwich panels and it is utilised in: floors, roofs, doors, partitions, facades, working surfaces for automatic machines, laser jet cutting and for all products which require an optimal stiffness-to-weight-ratio." >"Aluminium honeycomb is highly desirable due to its incredibly high strength-to-weight ratio and is applicable wherever lightness and strength are required." So, very interesting! Another material of the future, no doubt! (I bet it works great as an electrical ground and/or antenna, too!)
- divbzero 3y agoThis works out to 29.1 m/s², or about 3.0 g of acceleration. https://www.wolframalpha.com/input?i=0+to+100+kph+in+0.956+seconds https://www.wolframalpha.com/input?i=0+to+100+kph+in+0.956+s...
- outside1234 3y agoHow many Gs would this be in terms of acceleration? And does this induce the same sort of challenges that jet pilots have with high speed turns?