Hi All
I have a bit more progress to share with you.
The flywheel hub needs some pockets in the side faces to house the back of the dummy wedges.
I decided that I would finish the dummy wedges later, and get on with the spokes next. The spokes are hollow and pulled into the hub with long cap head screws, the outer end of the spokes have a round flange with webs and raised bosses for the four bolts that fasten it to the flywheel rim. So each spoke had to be fabricated from six machined parts silver soldered together.
Here is the start of an outer flange.
The main part of the spoke just happened to be as near as made no difference N°2 Morse taper, my taper turning attachment on the Harrison lathe was already set up for that so eight spokes were done in quick time.
Here is a trial assembly to make sure they fit the hub correctly.
You get some idea of how the spokes are going to look now.
So on to the Boley jig borer and start removing the unwanted metal to reveal the webs.
Then add some holes for the bushes that will form the raised bosses.
Starting to look like spokes nearly.
Now the boring bit making 32 top hat bushes.
Then final assembly with silver solder.
They looked a bit grotty at this stage.
But I took them to work and bead blasted them.
So we now have the hub and spokes together at last.
This assembly will eventually have the ends of each spoke finally machined to length so it fits inside the rim sections.
Next I will finish off the dummy wedges, firstly blank sheet metal discs were turned to fit the recesses in each side of the hub, along with a ring which will be loctited on last job to hold everything in place.
Again using the Boley this had the slots machined where the dummy wedges fit.
A little bit of filing to square up the ends and they are finished.
Next up are the 16 dummy wedges. I made 8 pieces with one on each end.
The outer radius was applied with a belt linisher, then some de-burring with a fine file.
Before final parting off the parent metal.
This is the effect I was aiming for shown on the full size engine.
This is my model version of it, not 100% exact but I am pleased with it.
Phil