I guess I have been idle enough, so let's build another engine. But I have been busy with work by the way. Anyway I have had my eye on this engine since Jason B built his. You just give inspiration Jason watching your build.
I thought I would start out with some of the hard parts first. Like making the bevel gears that I did in another thread.
So we start by making the pulley wheel. The curved spokes is somewhat of a challenge and I first drew it up in cad using it to get my drilling measurements. I have never done a curved spoke wheel before.
This first photo is the pulley being cut to size and left extra inside the spoke area to be finished after the spokes are finished and you will see why.
After centering the RT under the mill and turning a mandrel to mount the pulley we start drilling the .25" holes all the way around and then using my cad sheet to give my the degrees to the .125" hole all were drilled.
After drilling the holes I decided to try something that I never do before. I mounted GHT,s small rotary table on the mill. The mounted the pulley loosely so I could turn it or slide it in the T slot. Then by swinging the table into an arc lined up the pulley by eye. Then proceeded to cut the first arc after placing it into to outer .125" hole for aligning the rest of the cuts. After each cut I loosen the pulley and rotated it till the next .125" hole and it fell into place.
This is a far shot so you could see how it's mounted.
Then it was back to the RT to clean up the inside radius. I probably could of done this on the rotary table but securing it was a small challenge.
Then back to the lathe to clean up the material I left. If you look back at some of the photos you can see way I left a bit to cut later. We are also putting a 2 degree taper on the pulley crown.
The pulley finished that is for now there is always more to do on it before the final engine is complete.
Thanks for looking.
Don
