... . 1 but I haven't seen a GA drawing to confirm this. The scan below is from P. Kay's reprint of Sidney Stone's "Railway Carriages& Wagons, their design& construction" of 1903 and shows the central pivot- more clearly in the lower figure. I've recently had "fun" building a wagon with bogies suspended on this principle- but with lockdown I've yet to be able to test it: I need to do some new layout planning (with Templot) and start baseboard construction... Attachment: attach_3188_2547_scan.jpg 13 posted: 18 Dec 2020 11:39 from: Matt M. Hi Nigel, I may be wrong as this isn't a strong point but if my memory serves Dean bogies have a central pivot. They don't bear on it unlike the more usual bogie designs. Dean bogies are about the secondary suspension. The full name that I know is Dean Hung Suspension Bogies. You have two fixed bolsters that are attached to the underframe of the carriage at each end by a hefty post. These bolsters ride on volute springs ...