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McLaren MP4/7A

From Wikipedia, the free encyclopedia
Formula One racing car for the 1992 season

Racing car model
McLaren MP4/7A
McLaren MP4/7A
The MP4/7A ofAyrton Senna on display at theHonda Collection Hall
CategoryFormula One
ConstructorMcLaren International (chassis, gearbox)
Honda Racing F1 (engine)
DesignersNeil Oatley(Executive Engineer)
Matthew Jeffreys(Head of Vehicle Design)
David North(Head of Transmission)
David Neilson(Head of Suspension)
Dieter Gundel(Head of Systems Engineering)
Bob Bell(Head of R&D)
Henri Durand(Head of Aerodynamics)
Osamu Goto(Engine Technical Director (Honda))
PredecessorMP4/6B
SuccessorMP4/8
Technical specifications[1]
ChassisCarbon fibremonocoque
Suspension (front)Double wishbones, pushrods
Suspension (rear)Double wishbones, pushrods
EngineHonda RA122E/B, 3,496 cc (213.3 cu in), 75°V12NA (max: 15000 rpm)mid-engine,longitudinally mounted
TransmissionMcLaren transverse 6-speedsemi-automatic
Power764–805 hp (570–600 kW; 775–816 PS) @ 14,500 rpm
FuelShell
TyresGoodyear
Competition history
Notable entrantsHondaMarlboroMcLaren
Notable drivers1.BrazilAyrton Senna
2.AustriaGerhard Berger
Debut1992 Brazilian Grand Prix
First win1992 Monaco Grand Prix
Last win1992 Australian Grand Prix
Last event1992 Australian Grand Prix
RacesWinsPodiumsPolesF/Laps
1451112
Constructors' Championships0
Drivers' Championships0

TheMcLaren MP4/7A is aFormula One car designed byMcLaren International andHonda Racing F1 for use by McLaren in the1992 season. It is a follow-up to their successfulMP4/6 from1991.

Background

[edit]

TheWilliams-Renault combination was getting faster and more reliable and became a formidable challenger to McLaren's dominance. McLaren used the MP4/6 chassis, now designated MP4/6B for slightly modified front wing aerodynamics, for the first two races of 1992. The all-new MP4/7A was expected for the Spanish Grand Prix, the fourth race of the year. However, due toWilliams' speed in pre-season testing (as well as their dominance of the first two rounds of the season), McLaren team principalRon Dennis made the decision to bring the car out one race early, at theBrazilian Grand Prix. This was one month earlier than expected.

Design

[edit]

This was the first McLaren to use asemi-automatic transmission; it was a McLaren-designed electro-hydraulic clutch and paddle-shift unit with semi-automatic activation (a semi-automatic transmission had been tested during the previous season with the MP4/6 and was on track during practice for the 1991 Hungarian Grand Prix, but the team elected to retain that car's original manual transaxle for the entirety of that car's use in competition). The team's technology partnerTechniques d'Avant Garde (TAG) helped with development. This system allowed the driver to keep his foot on the pedal, without lifting from it since thethrottle cable was replaced with an electronic sensor. It also controlled engine speed, rev-matching, and clutch actuation automatically during gear changes.[2] The MP4/7A also gainedtraction control at theHungarian Grand Prix.[3]

A variant of the car, dubbed MP4/7B, featuring an experimental active suspension system, was introduced in testing for that year'sPortuguese Grand Prix, though it proved insufficiently reliable and was not used for the remainder of the 1992 season. The system would, however, be used on the MP4/7A's replacement,1993'sMP4/8.

WithHonda pulling out of Formula One at the end of the 1992 season (after 69 wins as an engine supplier since1983, 44 of them with McLaren), the team would be forced to use customerFordV8 engines in 1993, thus the MP4/7A was the last McLaren to use the Japanese engines until the McLaren Honda partnership was renewed prior to the2015 season; the failure of that partnership to produce a race-winning car means the MP4/7A remains the last Honda-powered McLaren Formula One car to win a Grand Prix.

Season summary

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For the first time since1987, McLaren failed to capture the Constructors' or Drivers' Championship title. It was, therefore, the first time the team had failed to win the championships with Honda power, as the years1988 to1991 had all been successful in this respect. While the MP4/7A showed that it was able to keep up with the Williams FW14B in a straight line on several occasions, the active suspension on the Williams allowed it to better utilize its aerodynamic package, thus relegating the passively-suspended McLaren to 'best of the rest' status. The MP4/7A also suffered from teething troubles early on: both Senna and Berger dropped out of the car's debut race in Brazil with electrical problems. Defending champion Senna also suffered three straight DNFs during the middle of the season, effectively ending any hopes he may have had at defending his title. Five Grand Prix victories were recorded by the drivers: three forAyrton Senna, in his fifth season for the team, and two forGerhard Berger in his third and final season for McLaren before switching back to Ferrari for 1993.[4]

Complete Formula One results

[edit]

(key) (results inbold indicate pole position, results initalics indicate fastest lap)

YearTeamEngineTyresDrivers12345678910111213141516PointsWCC
1992HondaMarlboroMcLarenHonda RA122E/B
V12
GRSAMEXBRAESPSMRMONCANFRAGBRGERHUNBELITAPORJPNAUS99*2nd
Ayrton SennaRet931RetRetRet21513RetRet
Gerhard BergerRet4RetRet1Ret5Ret3Ret4221

* 9 points scored using theMcLaren MP4/6B

Footnotes

[edit]
  1. ^"McLaren MP4/7A • STATS F1".
  2. ^Source:Autocourse 1992-93, Hazelton Publishing, page 40.
  3. ^""Significant Other" (SO)"(PDF).grandprixengines.co.uk. Retrieved22 September 2020.
  4. ^Source: Autocourse 1992-93, Hazelton Publishing, page 238.
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(2000-2008)
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(1998-1999)
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(1964-1968)
Soichiro Honda
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