By on February 11, 2010

The euro-trance exhaust note is what tipped us off. The GT3 R Hybrid is not planned for production, but will serve as a “racing laboratory” in the 24 Hours on the Nordschleife of Nürburgring, reports Green Car Congress. Williams Hybrid Power is reportedly exploring road-car applications of its Formula 1 KERS-derived “fly-brid” system. Technical details after the jump.

The 911 GT3 R Hybrid features an electrical front axle drive with two electric motors developing 60 kW each supplementing the 480-bhp (358 kW) four-liter flat-six at the rear of the 911 GT3 R Hybrid. Instead of the usual batteries of a hybrid road car, an electrical flywheel power generator fitted in the interior next to the driver stores recaptured energy and delivers it to the electric motors.

The flywheel generator itself is an electric motor with its rotor spinning at speeds of up to 40,000 rpm, storing energy mechanically as rotation energy. The flywheel generator is charged whenever the driver applies the brakes, with the two electric motors reversing their function on the front axle and acting themselves as generators. Then, whenever necessary—i.e., when accelerating out of a bend or when overtaking—the driver is able to call up extra energy from the charged flywheel generator, the flywheel being slowed down electromagnetically in the generator mode and thus supplying up to 120 kW to the two electric motors at the front from its kinetic energy. This additional power is available to the driver after each charge process for approximately 6 – 8 seconds.

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