my friend i am giving you some news from rcf kapurthala that you are lucky that you are getting jerk free ride on new duronto trains here is cut off news from this website
"kapurthala: the journey on duronto train would be now jerk-free as the rail coach factory here has completed first rake with a new type of central buffer coupler, which joins the two bogies, with special focus on reducing jerks.
manufactured by a swedish company, the coupler has been produced to suit indian requirements and conditions. expected...
more... to be commissioned in second half of february, the rake would run on secunderabad-mumbai route. its running would be monitored by research, design and standard organization and rcf, said rcf general manager pardeep kumar, who superannuated on monday.
"earlier, we had been using screw-type coupler but those did not mitigate the jerks. then, we imported these couplers, which were being used in lhb type coaches. however, after the train length went beyond 10 coaches, the jerks again started. then studies were made on these couplers to make it suitable for indian conditions, " he said.
the couplers would also absorb the shocks in case of any untoward incident, reducing the effect on passengers. after monitoring their performance and cost, the model would be replicated, pardeep kumar added."
thanks
anil