Question 320

The 'X' system is currently in use for the motor sport season for the very first time, and is under development for road vehicles.The concept of transferring the vehicle’s______ energy using Flywheel energy storage was postulated by physicist Richard Feynman in the 1950s and is exemplified in complex high end systems such as the Zytek, Flybri, Torotrak and Xtrac used in race cars. Xtrac and Flybrid are both licensees of Torotrak's technologies, which employ a small and sophisticated ancillary gearbox incorporating a continuously variable transmission (CVT). In 'X' the whole mechanism including the flywheel sits entirely in the vehicle’s hub (looking like a drum brake) and a differential replaces the CVT and transfers torque between the flywheel, drive wheel and road wheel.The first of these systems to be revealed was the Flybrid which appeared in an article in Racecar Engineering magazine.
Flybrid Systems' 'X' weighs 24 kg and has an energy capacity of 400 kJ after allowing for internal losses. A maximum power boost of 60 kW (81.6 PS) for 6.67 sec is available. The 240 mm diameter flywheel weighs 5.0 kg and revolves at up to 64,500 rpm. Maximum torque is 18 Nm. The system occupies a volume of 13 liters. There is a cloud of uncertainty surrounding the use of 'X' as all the teams are not prepared to use it .X?

Answer:The KERS or Kinetic Energy Recovery System. Cracked by Arjun