Chatham Historic Dockyard Railway
Bogie Flat wagon

The Dockyard narrow gauge tramway was also noteworthy in that it featured a relatively early application of bogie vehicles, albeit of a rather primitive nature.

The first of these vehicles was a tl'oJley used to carry loads of up to 4 tons, its length was 21ft, whilst its overall width 4ft and its height was 2ft 9in.

The frame material for this vehicle was English oak and the longitudinal side pieces were 5in wide, with a rebate innermost upper corners for the floor and 4in deep.

The centre longitudinal member was made from the same section material but the floor rebate configuration was rather more complex.

On the two end portions of the vehicle where the floor planking was longitudinal in configuration, there were two longitudinal rebates, one on each of the upper corners of the central member.

On the middle portion of the vehicle, where the floor planking was lateral in configuration, the height of the central member was reduced by the depth of the floor, namely 1.1/4in.

The transverse framing was of the ~me section material as the longitudinal framing [with suitable rebates for the floor], with the exception of the centre transverse member, this was 4.1I2in wide and 8in deep and constituted the anchor beam for lateral and longitudinal iron trusses and tie rods, the vertical truss irons were 1.1/2in diameter and the corresponding dimensions for the tie rods was O.875in.

The longitudinal side members were sUI'mounted by top side pieces, 8in deep and tapering in section from a width of 3.1I2in at the bottom to a width of 3m at the top.

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