Steve is still very busy trying to move house. He has, however cleaned up the oil pressure regulator which had, quite remarkably , survived on the half-engine which came from Buxton. It is a simple device where the oil is fed in from the side, underneath a piston which is held on its seat by a spring. When the correct pressure is achieved, the piston lifts and the oil runs through the centre of the body, emerging through the bottom which is directly above the timing gears. A good clean and a new centre bolt were all that was required and it is now safely stored away ready to fit.
On another front, Father delivered the piston patterns to the foundry this week. After some discussion, we have decided to do away with the chucking piece on the crown and to use the draw-bolt method of mounting them in the lathe. This will reduce any residual stresses in the crown and make the whole lot more stable when cutting the ring grooves.