At the Geneva Motor Show this week, Aston Martin has publicly demonstrated its limited edition Aston Martin One-77 super-car for the first time. Although the design is certainly striking, the machine was sitting next to him maybe more. In the first of two press days, the stand was dominated by the first full Aston One-77 chassis exposed for all to see. Dressed in aluminum and carbon fiber molding, forging and extrusion, skinless One-77 is the dream of an engineer.

Chris Porritt, Director of Program for the One-77, took a few minutes to give us a tour of this remarkable example of engineering. Bits of Mechanical One-77 is built more like the courage of a race in Le Mans Prototype of a typical production car. Of course, this is a ring of car production is a stretch anyway, since only 77 examples will be produced. major automobile manufacturers generally produce more prototypes for a program of new vehicles. Follow the jump for a walk through the One-77.

The high-performance cars based on several key elements. It ‘clear that an important prerequisite for the propulsion system and the One-77 is, but we will return later. Large amounts of power do not mean much without a platform to manage the dynamics of a busy driving. Doing this requires you to keep the rubber touches the road, and always know where the wheels are in relation to each other. This requires a rigid structure that minimizes the physical movement of the suspension points, as the car corners, accelerates, brakes and follow the contour of the road.

Ideally, the optimization of performance but also minimize the mass. Unfortunately, it often happens upstream with a brush unless you choose the right materials. Therefore, the engineers worked with Aston Multimatic to create a monocoque tub with skin wrapped in aluminum honeycomb core of carbon fiber. According to Porras, this technique provides a bathtub that is one and half times stiffer than the Vantage for about three quarters of the mass.

The front frame is made of machined billet aluminum girders that form the engine compartment and side impact structures. To help keep the weight of the One-77 down, many of the structural components that serve multiple purposes. In any structure, strength of components is determined in part by the dimensions of the structure. For example, a beam is more resistant to bending and torsion of a simple rectangular or cylindrical, the same amount of material that has the same cross-sectional area and weight.

That’s why racing chassis are made of simple steel tubes instead of solid bars – more power for a given mass. The same applies to the structure of 77 carbon fiber. By creating structural holes, the resistance increases. However, engineers have taken advantage of the internal volume for use as conduits, eliminating the need for other parties. Aluminum beams in the front are used to send plane to come through the door on the right front brake.

Similarly, the air is brought in front of the machine through the structure of coal, which forms the upper part of the engine compartment of a couple of very short channels on both sides, which both feed intake plenum. That the air passes through the pair of throttle bodies fitted to each plenum total of four. Chassis # 1, as stated in Geneva, weighs just 2400 pounds a complete engine, suspension, brakes and tires.

The movement of these wheels is ensured by a system of triangulation classical upper and lower each corner. Here’s One-77 looks like a race car over a typical road car. Instead of mounting the springs and dampers in the vertical and link directly to the triangulation, Aston Martin went with a layout rod. A bell crank passes through the wheels are a link which compresses the springs and shock absorbers mounted horizontally in front of the engine. The advantage of this arrangement is that it reduces the unsprung mass, cross resistance to vertical movement of the wheels.

He was behind the extra space, which allows a simpler, directly affecting the links in the control group with spring-damper. The aluminum frame behind a car with four coil springs. Porritt said that the two smaller coils are actually part of a hydraulic mechanism anti-roll bar. Typical anti-roll bar is really just a steel bar in torsion spring connecting the two wheels on the limit the relative movement of the wheels, and then roll.

The use of coils allows for some variability of the rear roll stiffness. This is a part of it, like every-77 is tuned to the particular tastes of the owner. On the inside of each plate is a block contains a couple of distributors. Gate valve to pull his name from its shape, with larger diameters at the ends and narrower in the middle. Using a flow channel of the coil hydraulic shock absorber allows effective aperture size is changed so that the workflow.

Most dampers are holes in the flexible plates that move through the fluid inside the tube and offer limited adjustments without dismantling and replacement plates. The One-77 dampers use a simple suction cup and the coils act as the hole. When a customer takes delivery of a One-77, he or she arrives at the test track and driving the car. Aston then technicians will make adjustments to the coils and others to meet the tastes of the owner and the driving style. The system is not adequate or electronically controlled, but must be effective.

changes of direction can traditional ZF rack and pinion steering. It is equipped with a variable hydraulic Servotronic power assistance system. Porritt said the hydraulic system has been “the purity of feeling.” Electric power assist systems have made progress, but still not entirely what they wanted to Aston Martin for this application.

As McLaren Mercedes SLR, One-77 is configured as a GT before mid-engine with a power entirely behind the center line of the front axle. The front engine with aluminum die-casting, providing in-board mounting points for the spring/damper. Distribution is also the oil reservoir for dry sump engine lubrication system.

The engine itself starts in the same mold used to block the 6.0-liter V12 in other contemporary Aston Martin. In the form of 7.3 gallons used for the One-77, is “unique cylinder heads, a single crankshaft, connecting rods, pistons, cams and intake system. In fact, the only remaining supply chain right. ” All together, which should amount to something in the neighborhood of 750 horsepower. Development work on the new engine has been developed in partnership with Cosworth, the racing engine manufacturer with its patented casting process for manufacturing the V12 unit since its introduction.

Like most modern supercars, becomes the power of the V12 is sent to the rear axle by a six-speed transmission with sequential semi-automatic paddle shifters. This gearbox has been reinforced specifically developed for One-77. The task of distributing the kinetic energy will be provided by carbon ceramic brakes, more and more common on high-end equipment supercars. A set of six-pot calipers squeezing front rotors, but the bracket itself has been modified to minimize heat transfer to brake fluid.

A machine with a speed capability of a One-77 is aerodynamically stable. To this end, Porritt said the car is transferred to the rear spoiler, which increases the speed. A couple of radiators in front of the car near even at higher speeds to maintain the aerodynamic balance. The actuator operates in every corner of the suspension to lower the car about 15-20 mm to reduce drag.

Despite the large rear diffuser for the car should be essentially neutral at a speed no elevator or against. Porras said that when the car starts to generate significant support, larger, heavier wheels and a firmer suspension is necessary, which would have a negative impact on ride quality, something contrary to what Aston Martin is trying to achieve. The One-77 is destined to be one of the fastest cars on the road, keeping all the luxury and refinement that Aston Martin is still looking.

As an engineer and car fanatic, as the chassis of the presentation one of the 77 was very exciting. Check all the fine detail work that makes me regret what has been suggested by interested parties in a previous post: Body transparent. After all, if you spent all the time, effort and money to create this framework, why hide it?

According to Porras, “when building a fully functioning car will be about 3,300 pounds.” Compared to the Mercedes-Benz SLR McLaren is a slender body that surely will not stop the One-77 to reach the target of at least three seconds from 0 to 60 mph and a top speed 200 mph +. Porritt is expected to fully operate the first car to be completed in late March 2009.

Work on the One-77 began in late 2007, Aston Martin CEO Dr. Ulrich Bez announced that the first production car would be delivered in late 2009. The 77 samples are expected to be completed later this year.

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