Bharat Forge & Spanish Talgo have formed a joint venture BF Infrastructure to produce high speed passenger trains has been established.. The planned partnership will concentrate on establishing a hub for production, maintenance, and life cycle support for the next generation of lightweight, energy-efficient high-speed trains made of aluminium.The project comes after the Indian Railways issued a tender for the production and upkeep of 100 new generation, lightweight, and energy-efficient trains.Talgo is a Spanish manufacturer of intercity, standard, and high-speed passenger trains. Talgo trains are best known for their unconventional articulated railway passenger cars that use in-between carriage bogies that Talgo patented in 1941, similar to the earlier Jacobs bogie. The wheels are mounted in pairs but not joined by an axle and the bogies are shared between coaches rather than underneath individual coaches. This allows a railway car to take a turn at higher speed with less hunting oscillation. As the coaches are not mounted directly onto wheel bogies, the coaches are more easily insulated from track noise. Talgo trains fitted with variable gauge axles can change rail gauge - for instance at the 1,668 mm Iberian gauge or 1,435 mm standard gauge at the Spanish-French border interchange. Since the introduction of the Talgo Pendular in 1980, the train tilts naturally inwards on curves, allowing it to run faster on curves without causing discomfort to passengers. The carriage tilting system pivots around the top of the suspension columns, which has the effect of partially cancelling the effects of lateral acceleration when cornering.