Often it is reported that Talgo trains run on curve with out decelerating. This is not true. When the talgo trains negotiate a curve, it tilts inwards a little to counter the centrifugal force. There is a maximum limit to which the trains can tilt and only to that extent only its speed can be be higher (then normal trains). It may be typically 20-30% higher i.e. A LHB train having MPS of 130 kmph if runs at 70 kmph at curve, the talgo train shall run at around 90kmph on curve and not 130kmph i.e. its booked speed.