McLaren M23

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McLaren M23
Emerson Fittipaldi McLaren M23 1974 Britain.jpg
Emerson Fittipaldi in the McLaren M23 at the 1974 British Grand Prix.
Category Formula One
Constructor McLaren Racing
Designer(s) Gordon Coppuck
John Barnard
Ray Stokoe
Predecessor M19C
Successor M26
Technical specifications [1]
Chassis Aluminium monocoque.
Suspension (front) Double wishbone, with inboard coilover shock absorbers.
Suspension (rear) Double wishbone.
Axle track 62 in (157 cm)
Wheelbase 101 in (257 cm)
Engine Ford-Cosworth DFV 2,993 cc (182.6 cu in) 90° V8, naturally aspirated, mid-mounted.
Transmission Hewland FG400 5/6-speed manual gearbox.
Power465 hp (347 kW) @ 10,800 rpm [2]
280 lb⋅ft (380 N⋅m) torque
Weight575 kg (1,268 lb)
Competition history
Notable entrants Yardley Team McLaren
Marlboro Team Texaco
Marlboro Team McLaren
Notable drivers Flag of New Zealand.svg Denny Hulme
Flag of the United States.svg Peter Revson
Flag of Germany.svg Jochen Mass
Flag of the United Kingdom.svg Mike Hailwood
Flag of Brazil.svg Emerson Fittipaldi
Flag of the United Kingdom.svg James Hunt
Debut 1973 South African Grand Prix
RacesWins Poles F/Laps
83161410
Constructors' Championships1 (1974)
Drivers' Championships2 (1974: Fittipaldi; 1976: Hunt)
n.b. Unless otherwise stated, all data refer to
Formula One World Championship Grands Prix only.

The McLaren M23 was a Formula One racing car designed by Gordon Coppuck, with input from John Barnard, and built by the McLaren team. It was a development of the McLaren M16 Indianapolis 500 car. A Ford Cosworth DFV engine was used, which was prepared by specialist tuning company Nicholson-McLaren Engines. This helped push the DFV's horsepower output to around 490 bhp.

Contents

A total of 13 chassis were built, with serial numbers 1 to 12 and 14. No number 13 chassis was built, as it was deemed to be unlucky. [3]

History

1973

Denny Hulme's 1973 McLaren-Ford M23 being demonstrated at the Goodwood Festival of Speed 1973 Mclaren Ford M23 Goodwood, 2009.JPG
Denny Hulme's 1973 McLaren-Ford M23 being demonstrated at the Goodwood Festival of Speed

The M19 had reached the end of its development life and a new design was needed to keep pace with the latest generation of Formula One cars and regulations regarding deformable crash protection structures. [4] Taking inspiration from the M16 Indycar and utilising the M19's rear suspension design, the new M23 was introduced for the 1973 season, and scored pole position with Denny Hulme on its very first outing. Hulme and Peter Revson took three wins between them that season, while rookie Jody Scheckter nearly added a fourth. Scheckter was responsible for one of the biggest accidents Formula One has ever seen, at the 1973 British Grand Prix, when he spun his M23 in front of the pack. [5]

1974

Mike Hailwood driving a Yardley-liveried McLaren M23 at Brands Hatch in 1974 Yardley McLaren MH0067.jpg
Mike Hailwood driving a Yardley-liveried McLaren M23 at Brands Hatch in 1974

Emerson Fittipaldi joined McLaren from Lotus in 1974. His knowledge of the Lotus 72 helped McLaren develop the M23 and that season Fittipaldi gave McLaren its first drivers' and constructors' world championships, beating Ferrari, Tyrrell and Lotus with four wins.

The season saw Marlboro become title sponsors of the team, which they would continue to be so until 1996. Fittipaldi worked on improving the car; a wider track and longer wheelbase were adopted. [6] The revised M23 featured redesigned bodywork, wings and aerodynamics were introduced during the year. [7]

Fittipaldi took three wins, while Hulme won once in a closely fought season.

1975

A McLaren M23 with much of its bodywork and front wing removed, Cosworth DFV visible in the rear. Note the exposed pedals between the front wheels and minimal upper-body crash protection, very different from today's F1 cars. McLaren M23 without bodywork.jpg
A McLaren M23 with much of its bodywork and front wing removed, Cosworth DFV visible in the rear. Note the exposed pedals between the front wheels and minimal upper-body crash protection, very different from today's F1 cars.

Further development in 1975 – including a 6-speed gearbox, a novelty for the time – helped Fittipaldi to second in the drivers' championship behind Niki Lauda, who had the benefit of Ferrari's 312T chassis and McLaren to third in the constructors' championship, behind Ferrari and Brabham. [8]

The team experimented with different bodywork styles, including aerodynamic kickups in front of the rear wheels, different nose profiles and extended bodywork in front of the rear wheels, housing the oil coolers. [9]

Also making an appearance were side mounted skirts which sealed the underside of the car to the racetrack, a precursor to the ground effect technology first seen properly with the Lotus 78. [10] Most of these changes were adopted for the M23 and its successor, the McLaren M26.

1976

James Hunt won the British Grand Prix, but was later disqualified after the race. James Hunt British GP 1976.jpg
James Hunt won the British Grand Prix, but was later disqualified after the race.

At the end of 1975 Fittipaldi left the team to join his brother's Copersucar-sponsored Fittipaldi Automotive team. He was replaced by James Hunt, who went on to win a dramatic and controversial 1976 season with the final evolution M23, the M23D.

New regulations outlawing the tall airboxes over the engines were introduced for the Spanish Grand Prix. As a result the M23 sported mid mounted air scoops on either side of the roll bar. The oil coolers were repositioned to be in front of the rear wheels. [11]

James Hunt won six races on his way to the world championship. [12]

1977

The M26 was seen as the future and development had ended on the M23 by the end of 1976. However, when the new car proved troublesome, Hunt and Jochen Mass relied on the M23 in the early part of the 1977 season, and even though the car was now four years old it was still competitive, earning several pole positions and podium finishes. [13]

Gilles Villeneuve made his Grand Prix debut at the 1977 British Grand Prix in an M23. [14]

The M23 was never the most technically advanced F1 car, but sound preparation and continual development helped it win 16 Grands Prix, two drivers' and one constructors' world championships in its lifetime. [15]

The M23 was also modified for use in Formula 5000 racing. Australian driver John McCormack drove a Leyland powered M23 to win the 1977 Australian Drivers' Championship. McCormack also put his M23 on pole for the 1978 Australian Grand Prix. [16]

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McLaren-Cosworth M23
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Complete Formula One World Championship results

(key) (results in bold indicate pole position; results in italics indicate fastest lap)

YearEntrantEngineTyresDriversNo.1234567891011121314151617PointsWCC
1973 Yardley Team McLaren Ford Cosworth DFV
3.0 V8 		G ARG BRA RSA ESP BEL MON SWE FRA GBR NED GER AUT ITA CAN USA 58*3rd
Denny Hulme 5676183Ret12815134
Peter Revson 4Ret57149Ret315
Jody Scheckter RetDNSRetRet
Jacky Ickx 3
1974 Marlboro Team Texaco Ford Cosworth DFV
3.0 V8 		G ARG BRA RSA ESP BEL MON SWE NED FRA GBR GER AUT ITA CAN USA 73 (75)1st
Emerson Fittipaldi 5101731543Ret2RetRet214
Denny Hulme 6112966RetRetRet67DSQ266Ret
Yardley Team McLaren Mike Hailwood 3345397RetRet47Ret15
David Hobbs 79
Jochen Mass 167
Scribante Lucky Strike Racing Dave Charlton 2319
1975 Marlboro Team Texaco Ford Cosworth DFV
3.0 V8 		G ARG BRA RSA ESP MON BEL SWE NED FRA GBR GER AUT ITA USA 533rd
Emerson Fittipaldi 112RetDNS278Ret41Ret922
Jochen Mass 2143616RetRetRet37Ret4Ret3
Lucky Strike Racing Dave Charlton 3114
1976 Marlboro Team McLaren Ford Cosworth DFV
3.0 V8 		G BRA RSA USW ESP BEL MON SWE FRA GBR GER AUT NED ITA CAN USA JPN 74 (75)2nd
James Hunt 11Ret2Ret1RetRet51DSQ141Ret113
Jochen Mass 12635Ret651115Ret37Ret54Ret
1977 Marlboro Team McLaren Ford Cosworth DFV
3.0 V8 		G ARG BRA RSA USW ESP MON BEL SWE FRA GBR GER AUT NED ITA USA CAN JPN 60*3rd
James Hunt 1Ret247Ret
Jochen Mass 2RetRet5Ret44Ret29
Bruno Giacomelli 14Ret
Gilles Villeneuve 4011
Iberia Airlines Emilio de Villota 3613DNQDNQDNQDNQ17DNQ
Chesterfield Racing Brett Lunger 30DNS11DNQ13Ret109Ret1011
1978 Liggett Group/
BS Fabrications 		Ford Cosworth DFV 3.0 V8 G ARG BRA RSA USW MON BEL ESP SWE FRA GBR GER AUT NED ITA USA CAN 158th
Brett Lunger 3013Ret11DNQ
Nelson Piquet 29RetRet9
Centro Aseguredor F1 Emilio de Villota 28DNQ
Melchester Racing Tony Trimmer 40DNQ

* 12 points in 1973 scored using the M19A and M19C
* 39 points in 1977 scored using the M26
* All points in 1978 scored using the McLaren M26

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References

  1. ↑ "McLaren M23 Cosworth". Ultimatecarpage.com. Retrieved 25 May 2010.
  2. ↑ "Engine Ford Cosworth • STATS F1".
  3. ↑ n.d. (March 2019). "McLaren M23". Motor Sport. United Kingdom: Motor Sport Magazine Limited.
  4. ↑ "1972 McLaren M19-C - Mathews Collection".
  5. ↑ "Phil Mauger's ex-Denny Hulme 1973 McLaren M23 Formula One Racecar, Serial No. M23/1, Number 7".
  6. ↑ "McLaren M23". 2 February 2009.
  7. ↑ "Grand Prix Cars - McLaren M23". www.grandprixhistory.org. 2 February 2009. Retrieved 13 December 2019.
  8. ↑ "Top Gear's coolest racing cars: McLaren M23". 14 June 2016.
  9. ↑ "McLaren M23/9". 24 December 2010.
  10. ↑ "Learning new tricks".
  11. ↑ "How McLaren and Ferrari went to war with the rules in '76".
  12. ↑ "1973 - 1977 McLaren M23 Cosworth - Images, Specifications and Information". Ultimatecarpage.com.
  13. ↑ "McLaren Racing - Heritage - M23". www.mclaren.com. Retrieved 13 December 2019.
  14. ↑ "When Gilles Villeneuve contested his first Grand Prix with McLaren in 1977".
  15. ↑ "F1: 7 things to know about the McLaren M23". auto123.com. Retrieved 13 December 2019.
  16. ↑ Klopfer, Wolfgang (13 December 2005). Formula 5000 in New Zealand & Australia: Race by Race. BoD – Books on Demand. ISBN   9783833431012.
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