To develop, build and operate an improved Gresley class P2 Mikado steam locomotive for mainline and preserved railway use

Ian Howitt (who did extensive and diverse work on Tornado) has been contracted to start making brake parts, starting with the brake hangers. The two rear hangers are straightforward, however the front six hangers are of an unusual shape and were probably originally forged. The reason for the complex shape is the close spacing of the coupled wheels to keep the overall coupled wheelbase to a minimum. As a result the normal position for the brake hanger brackets between the tyres is not possible, so they are on the bottom of the frame plates and are inboard to clear the backs of the tyres. The hangers are forked design to overcome this problem – see the CAD below. Ian is machining these from thick flame cut profiles.

The brake hanger being machined at Ian Howitt Engineering – Ian Howitt

The rear brake hangers – Ian Howitt

The superheater header, cast by South Lincs Foundry at Spalding – David Elliott

The main design activity has been the leading sandboxes whose position between the smoke lifting plates and the smoke box making them a particularly awkward shape. The design has had to be developed from their outline on the general arrangement drawing as we do not have detailed drawings of the sandboxes.

David Elliott’s scheme for the front sandbox – David Elliott