Thank you Dave
I think that is hopefully the hardest of the bits to make for this engine. Its downhill from now onwards
Edit: The following link is too long. You need to reduce it to around 44mm between the two holes. This is a known "feature" with this model Reaching up from the connecting rod is a drive link. Anthony expected this to be a casting and so would I
Instead we are making it out of Brass:
It is a pretty hefty piece of Brass and not the sort of bit most people would have hanging around
Luckily I had a suitable piece in my come-in-handie stash. The way it is drawn does not help you lay it out on a piece of bar. So first job find out the distance between centres to enable me to position it on the barstock:
The piece has been taken down to 8mm thick and has had the two holes drilled in the appropriate places:
You can see I have also added two pairs of buttons through the holes to protect them as I hand carve (hacksaw/files) the shape out:
Making sure to keep sufficient of the piece still there to be able to hold it:
Then turn 1.5mm bosses using the buttons to hold the piece:
Finally filing the two sides down to leave it 5mm thick:
The only really tricky bit was getting the clearance on the connecting rod so that it moves freely:
Nearly time to negotiate another set of castings
Jo