Pictures: McLaren MP4-24

McLaren unveiled their 2009 challenger, the MP4-24, at the team’s headquarters in Woking today. Forumula1.com takes a closer look.

While still retaining the distinctive family look established with both the MP4-22 and MP4-23, this year s car is visually very different from its predecessors as a result of two main factors: Aerodynamics and Kinetic Energy Recovery Systems.

Aerodynamics

This year s aerodynamic regulations were framed by the FIA and the Overtaking Working Group (helmed by Vodafone McLaren Mercedes engineering director Paddy Lowe, Ferrari s Rory Byrne and Renault s Pat Symonds) which met throughout 2007 in order to address the issues affecting passing in Formula 1.

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The OWG s influence can be most clearly seen around the front wing, which has been widened, and the rear wing which is now more compact. Other factors affecting aerodynamics include the banning of ancillary appendages, the addition of driver-adjustable front-wing flaps and a heavily revised diffuser.

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KERS

The MP4-24 s KERS device has been developed in collaboration with McLaren and Mercedes-Benz HighPerformanceEngines, which has been developing and refining the system for almost two years. The device enables the car to recover energy under braking, store the energy for a lap and release it when the driver presses a button on the steering wheel.

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With a fully optimised KERS device s output capped at 400kJ (discharging 80bhp boost for 6.7s per lap), the development team s primary focus has already shifted to further improving the unit s integration within the chassis in order to minimise performance loss elsewhere within the package.

An optimised KERS package can be expected to deliver a 0.3-0.5s gain per lap.

MP4-24 TECHNICAL SPECIFICATION

Chassis
McLaren moulded carbon fibre/aluminium honeycomb composite incorporating front and side impact structures. Contains integral safety fuel cell

Front suspension
Inboard torsion bar/damper system operated by pushrod and bell crank with a double wishbone arrangement
Rear suspension Inboard torsion bar/damper system operated by pushrod and bell crank with a double wishbone arrangement

Suspension
dampers Koni

Electronics
McLaren Electronic Systems control units incorporating electronics for chassis, engine and data acquisition. McLaren Electronic Systems also supplies the electronic dashboard, alternator voltage control, sensors, data analysis and telemetry systems

Bodywork
One-piece engine cover and sidepod covers. Separate floor section, structural nose with integral front wing
Tyres Bridgestone Potenza
Radio Kenwood
Race wheels Enkei
Brake calipers Akebono
Brake master cylinders Akebono
Batteries GS Yuasa Corporation
Steering McLaren power-assisted
Instruments McLaren Electronic Systems

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Engine
Type Mercedes-Benz FO 108W
Capacity 2.4 litres
Cylinders 8
Maximum rpm 18,000 (FIA regulatory limit for 2009)
Bank angle 90°
Piston bore maximum 98mm (FIA regulation)
Number of valves 32
Fuel Mobil High Performance Unleaded (5.75% bio fuel)
Lubricants Mobil 1 for higher performance, lower friction and better wear resistance
Weight 95kg (minimum FIA regulation weight)

Transmission
Gearbox Seven forward and one reverse
Semi-auto Yes
Driveshafts McLaren
Clutch Hand-operated

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Credit – McLaren