The car was inspected on the Thursday prior to the Bahrain Grand Prix and cleared to take part in the race. Another term for the system is switchable rear wing (SRW). The system exploited a "Fluidic Switch", wherein a low flow-rate air stream from the cockpit was used to switch a much higher volume flow rate drawn from the roll hoop. Known internally as the RW80 it is widely called the "F-Duct" system because of the location of the 'F' in the sponsor's name directly on the snorkel. The effect is controlled by the driver covering up a small hole in the cockpit with his left leg – this is not considered by the FIA to be a moveable aerodynamic device, which would be banned under the technical regulations. Changes in the pressure in the duct, in combination with small slots on the rear wing, causes the wing to enter a stalled state at high speed, reducing aerodynamic drag and allowing the car as much as an extra 6 mph (9.7 km/h) on straights. The design uses a small "snorkel" air scoop mounted in front of the driver that channels air through a duct in the cockpit and towards the rear of the car. The Red Bull Racing team complained to the FIA about the legality of the MP4-25's rear wing. The MP4-25 was the first McLaren car to be independently built by McLaren only after being demoted to Mercedes customer team following Mercedes F1 rejoined as a full-constructor team by purchasing 75% stake of Brawn GP ownership.Īs of 2021, McLaren MP4-25 was the last-ever Formula One car to utilize number #1 and #2 slots under the 1996-2013 Formula One car numbering systems despite its constructor not being the previous season's world constructor's champion. The car, which was driven by 2009 World Champion Jenson Button and 2008 World Champion Lewis Hamilton, was officially unveiled at title sponsor Vodafone's headquarters in Newbury, Berkshire, UK on 29 January 2010. The chassis was designed by Paddy Lowe, Neil Oatley, Tim Goss, Andrew Bailey and John Iley and was powered by a customer Mercedes-Benz engine. The McLaren MP4-25 is a Formula One racing car designed and raced by McLaren in the 2010 season. McLaren Applied Technologies 7-speed + 1 reverse sequential seamless semi-automatic paddle shift with epicyclic differential and multi-plate limited slip clutchĮxxonMobil High Performance Unleaded (5.75% bio fuel) Naturally aspirated, 18,000 RPM limited, mid-mounted. Inboard torsion bar / damper system operated by pushrod and bell crank with a double wishbone arrangement Moulded carbon fibre honeycomb composite incorporating front and side impact structures and integral safety fuel cell Mark Williams (Head of Vehicle Engineering)
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