This is how the engine was fabricated in layer of 1/8" thick brass stock. Just like using wood. They were cut internally and externally to required shapes. Spring clamps and a machine screw held layers together during soldering operation with a torch. I use Staybrite Silver Solder available at most shops.
This shot shows the shaping of the block upper and lower halves, this was all done with an assortment of hand files. Very carefully and slowly, no chance for filler. The inside core was cleaned and trimmed using a ball end mill in a Dremel tool.
This is an in-progress shot of me holding the parts together, gives a sense of scale. Pardon my grubby fingers. I have a series of photos of this engine owned by Dave Watts, if anyone needs some reference material.
This last shot is the engine installed in the fuselage. Note the hose clamp, it is easily fabricated using a jeweller's saw and almost cutting all the way thru a piece of tube, then solder a small tube for tightening screw. Clean off excess solder and then cut off from tube. Gives a nice touch of detail.
