Windchest and roller board

Now for the really complex bit. The roller board has been drafted out, but once we got it in CAD I realised that the rear rank valves would not open enough, so a little redesign using L links meant that the valve rods could be taken from the same position on all the keys.

Roller board drawing

The full mechanism from the keys to the valves.

In position from the front

Rear view with duct also shown.

Windhest with holes drilled in the toe board for the pipe tubes.

Ends are held on with brass crews. The whole windchest is oak.

Arrangement of the pipes (rear)

Pipes on the facade.