McMurtry Spéirling: Difference between revisions

The '''McMurtry Spéirling''' is a record breaking<ref>{{Cite web |date=2022-06-27 |title=The McMurtry Speirling has broken the Goodwood hillclimb record |url=https://www.topgear.com/car-news/motorsport/mcmurtry-speirling-has-broken-goodwood-hillclimb-record |access-date=2023-01-06 |website=Top Gear |language=en}}</ref>an [[Electric car|electric]] [[Single-occupancy vehicle|single-seat]] [[concept car|prototype]] [[sports car]] which was first presented at the [[Goodwood Festival of Speed]] in 2021. The car is developed by McMurtry Automotive, a British registered [[startup company|startup]] founded on 2 June 2016 by Sir [[David McMurtry]] (co-founder and executive chairman of [[Renishaw plc]]).<ref name=":0">{{Cite web |last=Vasilash |first=Gary |date=23 July 2021 |title=McMurtry Automotive reveals composites-intensive, fully electric Spéirling demonstrator vehicle |url=https://www.compositesworld.com/news/mcmurtry-automotive-reveals-composites-intensive-fully-electric-speirling-demonstrator-vehicle |access-date=2022-06-27 |website=www.compositesworld.com |language=en}}</ref><ref>{{Cite web |last=Edgren |first=John |date=2021-07-19 |title=Er dette verdens raskeste elbil? 0–300 på ni sekunder |url=https://www.tu.no/artikler/er-dette-verdens-raskeste-elbil-0-300-pa-ni-sekunder/512017 |access-date=2022-06-27 |website=Tu.no}}</ref> "Spéirling" is Irish for "thunderstorm".<ref>{{Cite web |last=Kew |first=Ollie |date=2022-06-27 |title=What is the McMurtry Spéirling? |url=https://www.topgear.com/car-news/best-2021/what-mcmurtry-speirling |access-date=2022-09-02 |website=Top Gear |language=en}}</ref>

According to McMurtry, the motivation behind the car was to challenge the industry trend of increasingly heavier vehicles and, by using first principles design, create a lightweight electric driversdriver's car. The prototype car is the first step to demonstrate what customers will experience on road and track.<ref name="I broke"/> It is not currently in a racing series but is built to satisfy relevant motorsport safety requirements, with crash structures and a [[Carbon-fiber-reinforced polymers|carbon-fibre]] [[monocoque]] chassis with integral rollover protection. Its unique performance differentiator is the fan -powered downforce system, givingproducing {{cvt|2000|kg|lb|round=50}} of downforce fromat a 0&nbsp;mphstandstill.<ref>{{Cite web |title=Goodwood Edition 22 |url=https://mcmurtry.com/goodwood/ |access-date=2023-01-06 |website=McMurtry Automotive |language=en-US}}</ref>

The car, developed in secrecy over three years, was first presented at the [[Goodwood Festival of Speed]] on 8–118 July 2021, and driven by [[Derek Bell (racing driver)|Derek Bell]]. The car had been developed in secrecy over three years.

* 0-{{cvt|60|mph|km/h|0|order=flip}} in 1.4s40 seconds

* 0-{{cvt|100|mph|km/h|0|order=flip}} in 2.6s63 seconds

* 0-{{cvt|145|mph|km/h|0|order=flip}} in 4.9s98 seconds

* {{convert|1/4|mile400|m|miles|0|abbr=outin|frac=4|disp=x| (approx. |)}} in 7.9s97 at {{cvt|177|mph|km/h|0}}seconds

When considering the {{frac|1|4}} mile time, the car had a {{cvt|233|mph249|km/h|mph|0}} top speed for roughly the last 3 seconds of the run.<ref>{{Cite web |last=Office |first=personMcMurtry Press |title=0-60mph and ¼ mile records set for carwow at Silverstone in McMurtry Spéirling |url=https://mcmurtry.com/0-60mph-and-%C2%BC-mile-records-set-for-carwow-at-silverstone-in-mcmurtry-speirling/ |access-date=2023-03-19 |website=McMurtry Automotive |language=en-US}}</ref> The car also ran on bespoke drag slicks and was not a production car model.<ref>{{Cite web |title=McMurtry Spéirling hits 60 mph in 1.4 seconds, quarter-mile in 7.97 |url=https://www.motorauthority.com/news/1138167_mcmurtry-speirling-hits-60-mph-in-1-4-seconds-quarter-mile-in-7-97-s |access-date=2023-07-17 |website=www.motorauthority.com|date=16 December 2022 }}</ref>

ManufacturerBelow are the specifications for the Spéirling PURE:<ref>{{Cite web |title=Speirling |url=https://mcmurtryfastestlaps.com/models/mcmurtry-speirling-pure/ |access-date=2024-07-10 |website=McMurtry Automotive}}</ref>:

* Peak power output: {{cvt|1000 bph (745kW)|hp|kW|round=5|order=flip}}

* Top speed: {{Convert|298.0185|mph|km/h|mph|abbr=unit|0|order=flip}}

* 0-{{cvt|60 |mph:|km/h|0|order=flip}} in 1.5540 secseconds

* Weight: 1200 Kg{{cvt|900|kg|lb|round=10}}

A special design aspect of the car is its active [[downforce]] system without the use of large splitters or wings, by means of twin fans which provide an extra {{Convert|2000|kg|lb|abbr=unit|round=50}} of downforce from a standstill. This allows the car to corner at a [[G-force]] of more than 3g.<ref>{{Cite web |title=Speirling |url=https://mcmurtry.com/speirling-pure/ |access-date=2024-07-10 |website=McMurtry Automotive}}</ref>. When the fans are at full speed, they emit about 120&nbsp;[[Decibel|dB]] of noise, comparable to that of a [[jet engine]] at full thrust.<ref>{{Cite web |title=SpeirlingGoodwood |url=https://mcmurtry.com/speirling/ |accessRecord-date=2022-06-27Setting |website=McMurtry Automotive}}</ref><ref>{{CiteSpéirling webto |last=OlivaSpawn |first=Jacob |date=19 June 2022 |title=Adorably Short ElectricRoadgoing Car Aims For 0 To 60 MPH In 1.5 Seconds |url=https://www.motor1caranddriver.com/news/593012a40436391/mcmurtry-fanspeirling-roadgoing-car-goodwood-recorddetails/ |access-date=20222024-0608-2714 |workwebsite=Motor1Car And Driver}}</ref>

The use of fans powered by separate motors to provide downforce was first conceived of by [[Jim Hall (racing driver)|Jim Hall]] for the [[Chaparral Cars#2J|Chaparral 2J]], a [[Can-Am]] car he designed, constructed and raced in 1970. ItHowever, the 2J was banned at the end of the 1970 Can-Am series. A downforce fan system was also used in the [[Brabham BT46|Brabham BT46B]] [[Formula One car]], which was designed by [[Gordon Murray]]. The BT46B raced at the beginning of the 1978 season to great effect before a rule change was made under pressure from other race teams, resulting in a ban on movable aerodynamic surfaces.<ref>{{Cite web |last= |first= |date=16 June 2022 |title=McMurtry target Goodwood FoS victory with fan car competing in motorsport for the first time since 1978. |url=https://mcmurtry.com/mcmurtry-target-goodwood-fos-victory-with-fan-car-competing-in-motorsport-for-the-first-time-since-1978/ |access-date=2022-06-27 |website=McMurtry Automotive |language=en-US}}</ref><ref>{{Cite web |last=Edelstein |first=Stephen |date=9 July 2021 |title=British startup McMurtry unveils electric track car with downforce-generating fan |url=https://www.motorauthority.com/news/1132852_british-startup-mcmurtry-unveils-electric-track-car-with-downforce-generating-fan |access-date=2022-06-27 |website=Motor Authority |language=en}}</ref>

The [[Wheel sizing|tyre width]] is {{cvt|210|mm|in|0}} on the front and {{cvt|240|mm|in|0}} on the rear, both on {{cvt|19|inch|mm|0}} rims. This is modest for a [[supercar]]sports car and is comparable with regular road cars which tend to have [[Tire|tyre widths]] from {{cvt|195|to|205|mm|in|1}}.<ref>{{Cite web |last=Valmot |first=Odd Richard |date=2013-10-06 |title=Alt du bør vite om dekk |url=https://www.tu.no/artikler/alt-du-bor-vite-om-dekk/235246 |access-date=2022-06-27 |website=Tu.no}}</ref>