beautifully engineered • The McLaren Mercedes SLR is Beautifully…

13 Jun 2014 | Author: | Comments Off on beautifully engineered • The McLaren Mercedes SLR is Beautifully…
Mercedes SLR

beautifully engineered

The McLaren Mercedes SLR is Beautifully Engineered

McLaren shows Mercedes how to build a supercar

The SLR features active aerodynamics; there is a spoiler mounted on the rear integral air brake flap. The spoiler increases downforce depending on its angle of elevation (angle of attack).

At a set speed, the spoiler/brake automatically raises to 10 degrees (15 degrees in the 722 edition), when demanded via the driver#8217;s switch, the elevation can be increased to 30 degrees (35 degrees in the 722 version) for increased rear downforce, at the cost of increased steady state drag, also when the driver applies the brakes the spoiler raises.

The SLR McLaren sports a hand-built 5.4-litre, supercharged V8 engine

The SLR sports a 232#160;kg (510#160;lb) hand-built 5,439 cc (5.439#160;L; 331.9 cu in), supercharged, all-aluminium, SOHC, V8 engine. The cylinders are angled at 90 degrees with three valves per cylinder and lubricated via a dry sump system. The compression ratio is 8.8:1 and the bore and stroke is 97#160;mm × 92#160;mm (3.8 in × 3.6 in).

The Lysholm-type twin-screw supercharger rotates at 23,000 rpm and produces 0.9 bar (13 psi) of boost. The compressed air is then cooled via two intercoolers. The engine generates a maximum power of 626 PS (460#160;kW; 617 hp) at 6,500 rpm and maximum torque of 780#160;N·m (580#160;lb·ft) at 3,250 to 5,000 rpm.

The engine is front-mid mounted. McLaren took the original concept car designed by Mercedes and moved the engine 1 metre (39.4 in) behind the front bumper, and around 50 centimetres (19.7 in) behind the front axle. They also optimised the design of the centre firewall.

Mercedes SLR

The SLR uses AMG SPEEDSHIFT R five-speed automatic transmission with three manual modes. For durability Mercedes selected a five-speed transmission rather than their seven-speed gearbox which was more complex and used more parts.

The car uses carbon fibre reinforced plastics (CFRP) construction in an attempt to keep the weight low. Despite CFRP materials the total curb weight is 1,750#160;kg (3,858#160;lb).

Car and Driver achieved a 0 to 60 mph (97#160;km/h) time of 3.4 seconds, and a quarter-mile time of 11.2 seconds at 130 mph (210#160;km/h) CD suggests the times may be even lower if temperatures were lower. Motor Trend tested the SLR and achieved a 0-60 mph time of 3.3 seconds in April 2006. Car and Driver achieved top gear acceleration 30-50 mph and 50-70 mph times of 1.7 and 2.4 seconds, which are the fastest ever recorded by the magazine in a production car.

The SLR also pulled 1.13#160;g on the skidpad.

Road and Track tested the car in their July 2005 Road Test and reached 60 mph (97#160;km/h) from a standstill in 3.5 seconds. The 0 to 100 mph (160#160;km/h) sprint was achieved in 7.5 seconds and a quarter mile run was completed in 11.5 seconds at 126 mph (203#160;km/h).

Mercedes SLR
Mercedes SLR

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