Meccano Silver Jubilee Train From 1947 Manual No. 8 Original model The original model is only supposed to run on the floor, this has been modified to run on O Gauge track. A Meccano E20R motor is geared down to run a pair of two inch 20a pulley wheels which are connected by chain to another pair of pulley wheels backed by two sprocket gears to act as flanged wheels. The original model has the locomotive and tender as one unit and the two passenger coaches as one unit. These have been modified as four units-locomotive, tender and two passenger coaches, as otherwise they will not turn on the track.