Engineering:Tesla Roadster (second generation)

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Short description: Upcoming electric sports car from Tesla
For Tesla's first sports car or its first generation, see Tesla Roadster (first generation).
Tesla Roadster
NextGenTeslaRoadster (cropped).jpg
Overview
ManufacturerTesla, Inc.
DesignerFranz von Holzhausen
Body and chassis
ClassSports car (S)
Body style2-door coupe
LayoutTri-motor, all-wheel drive
Powertrain
Electric motorThree electric motors (one front, two rear)
Battery200 kWh
Electric range620 mi (1,000 kilometres)
Chronology
PredecessorTesla Roadster (first generation)

The Tesla Roadster is an upcoming battery electric four-seater sports car to be built by Tesla, Inc. The company has said that it will be capable of accelerating from 0 to 60 mph in 1.9 seconds.[1][2][3] The Roadster is the successor to Tesla's first production car, the 2008 Roadster.

Tesla CEO Elon Musk has said that the Roadster should ship in 2024.[4] Musk said in a tweet that higher-performance trim levels will be available beyond the base specifications, including a SpaceX package that would "include ~10 small rocket cold air thrusters arranged seamlessly around the car" which would supposedly allow for dramatic improvements in "acceleration, top speed, braking & cornering" such as a claimed 1.1 second 0–60 mph (0–97 km/h) time.[5]

Overview

History

In 2011, at the end of the production run of the original Tesla Roadster, Elon Musk suggested that a new version of the Roadster, without the Lotus chassis, would return to production by 2014.[6] The new Roadster was first teased in 2014.[7] At the time, it was also referred to as the Tesla Model R.[8]

In 2015, Musk suggested a new Roadster, capable of faster acceleration.[9][10][11] A tweet by Elon Musk in December 2016 reconfirmed a second Roadster was in the works, but still "some years away".[12][13] The second Roadster was designed by Franz von Holzhausen.[14]

A prototype of the Roadster was shown in a surprise moment at the end of the Tesla Semi event on November 16, 2017, with an announced availability in the year 2020 at the starting price of US$200,000.[15][16] Musk explained the concept as: "The point of doing this is to give a hardcore smackdown to gasoline cars. Driving a gasoline sports car is going to feel like a steam engine with a side of quiche."[17] Test rides were given at the event for those who immediately paid the first $5,000 of a $50,000 deposit to pre-order the vehicle.[17][18][19][20] Additional information followed after the teaser, such as the various world-record speeds Tesla said it will break.[21][22][23][24]

In June 2018, Elon Musk revealed a potential feature called "SpaceX option package" for the Roadster.[25] This would add around ten cold gas thrusters to the car to improve maneuverability; it would comprise an electric pump to recharge an air tank used to provide compressed air flowing through propelling nozzles to generate a cold jet thrust. The air tanks, based on "composite overwrapped pressure vessel" (COPV) also used in the Falcon 9 and Falcon Heavy rockets, would replace the back seats. The thrusters would be used to improve cornering, acceleration, top speed, and braking.[26][27][28] Working pressure would be 10,000 psi (690 bar).[29]

Series 4, episode 12 of Jay Leno's Garage broadcast on August 23, 2018, featured Jay Leno inside the Tesla Roadster prototype along with its designer Franz von Holzhausen.[30]

During the 2020 second quarter financial results conference call, Elon Musk stated that Tesla plans to tentatively build the Roadster in California and production would be in the next 12 to 18 months.[31]

In January 2021, Elon Musk tweeted that production would be delayed until 2022. He commented that in 2021, the company would finish engineering the Roadster with the goal of having a "candidate design drivable late summer".[32] In September 2021, Musk said that production would be delayed until 2023.[33] Musk further confirmed the 2023 target at the 2021 shareholder's meeting in October,[34] which was then changed to 2024 at the May 2023 shareholder's meeting.[4]

Pre-order marketing

Pre-orders of the Roadster began in 2017, with a $50,000 deposit required.[17] Tesla owners taking part in the referral promotion program began accumulating discounts toward the purchase of a Roadster based on the number of referrals. Those reaching 55 confirmed referrals obtained a 100% rebate toward a future Roadster purchase.[35][36]

Price

The base model was initially listed on Tesla's website at $200,000, but the first 1,000 to be produced, known as the Founder's Series, will be priced at $250,000.[17][37] Full payment would be required to pre-order the latter vehicle. The price was later removed from the website, leaving only the deposit/reservation price of the base model as $50,000.[38]

Design

Second-generation Tesla Roadster interior

The second-generation Tesla Roadster is a 2+2 coupé[39] with a removable glass roof. It was designed by Franz von Holzhausen, Tesla's chief designer who has also been responsible for most earlier vehicles made by Tesla Motors. The Roadster has a 2+2 seating arrangement, with smaller rear seats for two passengers.[17]

The Roadster has three electric motors, one in front and two at the rear,[17] allowing for all-wheel drive, and torque vectoring during cornering. Tesla said that the vehicle will have a 200 kWh battery, twice the capacity of the largest battery in an existing Tesla car (in the Tesla Model S or Model X Performance or Long Range Plus), and much larger than the 123 kwh battery of the Tesla Cybertruck. Tesla has said that the Roadster will have a 620 mi (1,000 kilometres) range on a single charge at highway speeds. Tesla stated that the torque at the wheels was 7,400 lb⋅ft (10,000 N⋅m). The rear wheels are larger than the front wheels.[40]

Performance

Tesla Roadster seen on the 2020 Tesla Battery Day Event

The following claims have been made by Musk for the prototype Roadster's acceleration:

  • 0–60 mph (0–97 km/h) in 1.1 seconds with a rocket thruster option added (without specifying if this includes a 1-foot rollout).[41]
  • 0–60 mph (0–97 km/h) in 2.1 seconds for the base model before adding rocket thruster option (without specifying if this includes a 1-foot rollout or not).[42] Tesla's website later claimed 1.9 seconds.[3]

Its claimed 0 to 1⁄4 mi (0 to 400 metres) time will be 8.88 seconds, with a top speed above 250 mph (400 km/h).[43][44] If the production Roadster achieves these performance numbers, it will outperform the supercars of 2019 and would have set new production car records, none of which had done better than 0–60 mph (0–97 km/h) in 2.0 seconds or 8.88 seconds in the 1/4 mile,[43][44] until the release of the Rimac Nevera in August 2021.[45][46] Referring to the performance, Musk stated, "this is what we are achieving in the prototype"; he also indicated the performance may improve in the production model and that the stated numbers refer to the anticipated "base model".[43][44] The updated Model S Plaid released in 2021 set several production car records with performance stats close to those anticipated by the Roadster.

Analysis

Research completed by Bloomberg L.P. indicates that the estimate as to the range per charge is optimistic, based on comments from Salim Morsy, the electric vehicle analyst at Bloomberg New Energy Finance. In a 2017 article titled Tesla's Newest Promises Break the Laws of Batteries, Morsy indicated that the claimed battery capacity would require batteries that would be too large for the Roadster's small frame. "I don't think the car you saw last week had the full 200 kilowatt hours in it. I don't think it's physically possible to do that right now."[47] Morsy's analysis directly contradicts Musk, who had stated earlier in the year "this is what we are achieving in the prototype".[43][44]

Venkat Viswanathan, a mechanical engineering professor at Carnegie Mellon University,[48] told Jalopnik that the 1.9 second figure for 0–60 mph (0–97 km/h) seemed reasonable given the estimated battery weight of 1,836 pounds (833 kg). He added that the feasibility of the acceleration claim assumed suitable tires would be available for the required traction.[49]

See also

References

  1. ↑ Acceleration times:
    • 1.9s: standing start 0–62 miles per hour (0–100 km/h), without rollout allowance.
    • 1.9s: rolling start ~6–60 miles per hour (10–97 km/h), with 1-foot rollout allowance
  2. ↑ Musk, Elon [@elonmusk] (June 27, 2019). "2.1 sec 0–60 mph is base model before adding rocket thruster option". https://twitter.com/elonmusk/status/1144241444435238913. 
  3. ↑ 3.0 3.1 "Roadster". US: Tesla. https://www.tesla.com/roadster. 
  4. ↑ 4.0 4.1 Merano, Maria (2023-05-17). "Elon Musk sets expectations for next-gen Tesla Roadster production" (in en-US). https://www.teslarati.com/elon-musk-tesla-roadster-production/. 
  5. ↑ Musk, Elon [@elonmusk] (June 9, 2018). "SpaceX option package for new Tesla Roadster will include ~10 small rocket thrusters arranged seamlessly around car. These rocket engines dramatically improve acceleration, top speed, braking & cornering. Maybe they will even allow a Tesla to fly …". https://twitter.com/elonmusk/status/1005577738332172289. 
  6. ↑ Keene, Jaime (October 31, 2011). "Tesla Roadster to return in 2014". https://www.theverge.com/2011/10/31/2527364/tesla-roadster-resume-production-available-2014. 
  7. ↑ Lambert, Fred (June 13, 2017). "Tesla Roadster next-gen: Elon Musk considers target under 2-second for 'Maximum Plaid'". https://electrek.co/2017/06/13/tesla-roadster-next-gen-elon-musk-maximum-plaid/. 
  8. ↑ Eric Loveday (September 3, 2014). "By 2020, Tesla Could Be Selling 5 Electric Models Simultaneously". Inside EVs. https://insideevs.com/2020-tesla-selling-5-electric-models-simultaneously/. 
  9. ↑ Musk, Elon (July 17, 2015). "Three Dog Day". Tesla, Inc.. http://www.teslamotors.com/blog/three-dog-day. 
  10. ↑ Hill, Brandon (July 18, 2015). "Tesla Motors Will Launch All-New 'Maximum Plaid' Roadster Within Four Years". http://hothardware.com/news/tesla-launching-all-new-maximum-plaid-roadster-within-four-years. 
  11. ↑ Perkins, Chris (July 18, 2015). "Tesla will launch a new roadster in 4 years (with nod to 'Spaceballs')". http://mashable.com/2015/07/17/new-tesla-roadster/. 
  12. ↑ Klein, Jonathon (December 28, 2016). "New Tesla Roadster Planned, Says Elon Musk". Motor Trend (US). http://www.motortrend.com/news/elon-musk-confirms-new-roadster/. 
  13. ↑ Musk, Elon [@elonmusk] (December 23, 2016). "@jelleprins Some years away, but yes". https://twitter.com/elonmusk/status/812440156531662848. 
  14. ↑ Vaughn, Mark (November 17, 2017). "Tesla Roadster Sounds Incredible But Will It Be That Good?". AutoWeek. http://autoweek.com/article/car-news/tesla-roadster-sounds-incredible-it. 
  15. ↑ Etherington, Darrell (November 17, 2017). "Tesla unveils the new Roadster". TechCrunch. https://techcrunch.com/2017/11/16/tesla-unveils-the-new-roadster. 
  16. ↑ Shaban, Hamza (November 17, 2017). "For $200,000, Tesla will sell you the 'world's fastest' consumer car". https://www.washingtonpost.com/news/innovations/wp/2017/11/17/for-200000-tesla-will-sell-you-the-worlds-fastest-consumer-car/. 
  17. ↑ 17.0 17.1 17.2 17.3 17.4 17.5 Gibbs, Samuel (November 17, 2017). "Tesla Roadster: nine things we know about the 'smackdown to gasoline cars'". https://www.theguardian.com/technology/2017/nov/17/tesla-roadster-electric-supercar-elon-musk-fast. 
  18. ↑ Maclean, Andrew (November 17, 2017). "Tesla unveils new Roadster" (in en-US). https://www.drive.com.au/motor-news/tesla-unveils-new-roadster-116378. 
  19. ↑ "Surprise! Tesla Announces New Roadster Amid Electric Truck Reveal" (in en). https://www.newsfactor.com/story.xhtml?story_id=106686. 
  20. ↑ "All-new Tesla Roadster STEALS The SEMI's Show – Musk Plants A Flag In The Ground To END ICE Vehicles For Good" (in en). http://autospies.com/news/All-new-Tesla-Roadster-STEALS-The-SEMI-s-Show-Musk-Plants-A-Flag-In-The-Ground-To-END-ICE-Vehicles-For-Good-94795/. 
  21. ↑ Jivan, Jon (July 17, 2015). "Tesla's insanely fast Model S just got faster, ludicrously faster". https://electrek.co/2015/07/17/teslas-insanely-fast-model-s-just-got-faster-ludicrously-faster/. 
  22. ↑ Ziegler, Chris (July 17, 2015). "It's official: Tesla is launching a new Roadster in four years". https://www.theverge.com/2015/7/17/8994649/new-tesla-roadster-four-years. 
  23. ↑ Brodie, James (June 16, 2017). "2019 Tesla Roadster: Elon Musk hints at two second 0–60 target". http://www.autoexpress.co.uk/car-news/99251/2019-tesla-roadster-elon-musk-hints-at-two-second-0-60-target. 
  24. ↑ Glon, Ronan (December 28, 2016). "Tesla's next Roadster will be one of the quickest cars in the world". https://www.digitaltrends.com/cars/2019-tesla-roadster-performance-specs-news-range/. 
  25. ↑ Ramsey, Jonathon (June 9, 2018). "SpaceX option package for 2020 Tesla Roadster could add more performance". Auto Blog (US). https://www.autoblog.com/2018/06/09/tesla-roadster-spacex-option-package-performance/. 
  26. ↑ Lambert, Fred (June 10, 2018). "Elon Musk is serious about adding thrusters to the new Tesla Roadster, the option will replace the back seats". Electrek. https://electrek.co/2018/06/10/tesla-roadster-elon-musk-thruster-backseat/. 
  27. ↑ Morris, David Z. (June 10, 2018). "Elon Musk Says Tesla's Next Roadster Will Feature Actual SpaceX Rocket Thrusters". Fortune Magazine. http://fortune.com/2018/06/10/musk-tesla-roadster-spacex-rocket-thrusters/. 
  28. ↑ Krok, Andrew (June 11, 2018). "Elon Musk is 100 percent serious about Roadster thrusters". Roadshow (CNET). https://www.cnet.com/roadshow/news/elon-musk-tesla-roadster-thrusters-very-serious/. 
  29. ↑ Musk, Elon (September 7, 2018). "Elon Musk" (offset: 1.14:46–1.15:25). The Joe Rogan Experience (Interview) (1169). Interviewed by Joe Rogan. Archived from the original on September 8, 2018. Retrieved September 8, 2018. The next generation Roadster, … where you put rocket thrusters on it … ultra high compressed air … cold gas thrusters … electric pump … pump it up to like 10,000 psi … could make it fly
  30. ↑ Hanley, Steve (October 23, 2019). "Tesla's next-gen Roadster unleashes Jay Leno's inner child in 'Jay Leno's Garage' segment". CleanTechnica. https://cleantechnica.com/2018/08/20/new-tesla-roadster-featured-on-jay-lenos-garage-august-23/. 
  31. ↑ Lambert, Fred (July 22, 2020). "Elon Musk hints at Tesla Roadster production in California within 12–18 months". https://electrek.co/2020/07/22/tesla-roadster-elon-musk-production-california-12-18-months/. 
  32. ↑ Porter, Jon (2021-01-29). "Tesla Roadster production delayed to 2022" (in en). https://www.theverge.com/2021/1/29/22255902/tesla-roadster-production-2022-elon-musk-ceo-tweet. 
  33. ↑ "Elon Musk: Tesla Roadster Delayed (Again), This Time to 2023" (in en). 2021-09-01. https://www.motortrend.com/news/tesla-roadster-delayed-again-2023-elon-musk-twitter/. 
  34. ↑ "2021 Shareholder Meeting" (in en). https://www.tesla.com/2021shareholdermeeting. 
  35. ↑ Westbrook, Justin T. (July 12, 2017). "Tesla Is Offering People A Free Next Generation Roadster (If You Sell 50 Cars For Them)". https://jalopnik.com/tesla-is-offering-people-a-free-next-generation-roadste-1796866266. 
  36. ↑ Lambert, Fred (September 28, 2017). "Tesla updates its referral program to include solar panels, new prizes, removing $1,000 credit on cars". electrek. https://electrek.co/2017/09/28/tesla-referral-program-solar-panels-1000-credit-cars/. 
  37. ↑ "Roadster | Tesla". US: Tesla. https://www.tesla.com/roadster. 
  38. ↑ "Roadster | Tesla". US: Tesla. https://www.tesla.com/roadster. 
  39. ↑ McParland, Tom (November 17, 2017). "The New Tesla Roadster Isn't Actually A Roadster". Jalopnik (US). https://jalopnik.com/the-new-tesla-roadster-isn-t-actually-a-roadster-1820545274. 
  40. ↑ Dow, Jameson (November 20, 2017). "Tesla's Next-Gen Roadster: A (speculative) technical look at the car that will "smack down" gasoline powered cars". https://electrek.co/2017/11/20/teslas-next-gen-roadster-technical-analysis/. "tires on the prototype are Michelin Pilot Sport Cup 2 325/30ZR21 (104Y) rear and 295/35ZR20 front. These have a "Y" speed rating, which means they have a maximum speed of "over (300kmph)." They are the same tires used on the Porsche 918 Spyder (which has a /340kmph top speed)." 
  41. ↑ Musk, Elon [@elonmusk] (May 20, 2021). "0 to 100 km/h in 1.1". https://twitter.com/elonmusk/status/1395474465794838528. 
  42. ↑ Template:Citetweet
  43. ↑ 43.0 43.1 43.2 43.3 Tracy, David. "Here's What A Battery Researcher Told Us About The Tesla Roadster's Crazy Performance Claims" (in en-US). https://jalopnik.com/heres-what-a-battery-researcher-told-us-about-the-tesla-1820558723. 
  44. ↑ 44.0 44.1 44.2 44.3 "Elon Musk Unveils Tesla Semi, Roadster in 'Smackdown to Gasoline Cars'" (in en). November 17, 2017. https://nerdist.com/elon-musk-tesla-semi-roadster/. 
  45. ↑ Seabaugh, Christian (August 24, 2021). "2022 Rimac Nevera First Drive: The Promise Maker". https://www.motortrend.com/reviews/2022-rimac-nevera-electric-hypercar-first-drive-review/. 
  46. ↑ Bell, Lucas (2021-08-13). "Watch the 1900-HP Rimac Nevera Set an 8.52-Second Quarter-Mile World Record" (in en-US). https://www.roadandtrack.com/news/a37304155/rimac-nevera-quarter-mile-world-record/. 
  47. ↑ Randall, Tom; Lippert, John (November 24, 2017). "Tesla's Newest Promises Break the Laws of Batteries". Bloomberg. https://www.bloomberg.com/news/articles/2017-11-24/tesla-s-newest-promises-break-the-laws-of-batteries. 
  48. ↑ "Venkat Viswanathan". Carnegie Mellon University. https://www.meche.engineering.cmu.edu/faculty/viswanathan.html. 
  49. ↑ Tracy, David (November 17, 2017). "Here's What A Battery Researcher Told Us About The Tesla Roadster's Crazy Performance Claims". Jalopnik. https://jalopnik.com/heres-what-a-battery-researcher-told-us-about-the-tesla-1820558723. 

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