David Andrews Princess Royal – Replacement Exhaust Injector.

I am almost at the point of reassembly of the exhaust injector, having added bits, chopped other bits off and repositioned the main elbow bend.

This is a small taster of what I have been up to.

Drilling small holes in each corner with the dividing head

First I milled a square section on the end of a piece of brass rod and drilled a 1.6mm hole in the middle and then a 0.6mm hole at each corner before taking it back to the lathe to part it off. This is the basis for a very visible pipe flange.

Then I made up some miniature fixings and soldered them to the copper pipe. The much magnified photos make it look much messier than it is to the naked eye.