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- Aug 3, 2017
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Day/Part 30: Flywheels and start of Governor
This one took a few days, but short ones. I made the flywheels! As my last post stated, I'll likely need to go back and remake the breaker-side one at one point, since I ended up cutting it too thin. The OD and inner features are also not alike, since I changed the design when I made the second one. However, It "works" well enough that I might just make doing this flywheel a future project if I decide to fix it up.
Here is one of the flywheels, I first set it up in the 4 jaw and turned the face and half the OD. The plans/guide say to hold it by the hub, but my chucks are too large for that. I tried to center based on the words, but that only turned out so/so. Both wheels were lopsided unfortunately, so I didn't get a chance to make them in a way that the 'USA' didn't get cut.
I also cut the hub. This is the side that faces the outside of the engine
I flipped it around in the 4 jaw and discovered the problem I was going to have: How to indicate this in.
This seemed to work out. machining the OD here ended up just about right.
And a couple pictures of the 'done' wheels.
Next I made the governor collar. This attaches to the inside of the flywheel and holds the governor balls. The drawings on this are a little confusing, but hopefully I made this right anyway.
I turned the OD and made the ID on the lathe. I initially didn't realize that the hole went all the way through (temporary brain fart!) so I did it with a boring tool, rather than starting with a drill bit.
Then to the mill! I cut away a bunch of the material. Those 'ears' will have pins in them to hold the governor arms. I also drilled the mounting holes in this setup using the DRO.
Then, the pin holes. This setup was tough, but I did it with a parallel under the ears that I removed when drilling.
I used a quare to setup this cut, which was to cut the clearance for the arms themselves. It actually lacked a couple dimensions, so I guessed. In retrospect, I probably should/could have cut this in the first operation, and just been OK with rounded IDs. I could have filed the arms round.
And the part done!
I set the flywheel up in the mill with the fly collar on it to find hte first hole. Since I used the bolt-circle tool on the DRO to cut them, I knew exactly how far they were apart. So this was as easy as finding the first hole, then just moving .887" on the Y axis.
And tapping the holes 2-56.
Here is how they go together!
And a few pictures with ALL of the pieces I have so far attached. You can see the flywheel differences in these pictures. However, spinning the flywheels seems to work the way it should!
So there we are! I'm a touch concerned that the thimble inside the collar doesn't have enough room to move enough to actuate, but I think I can remove some material from it if necessary. I could also potentially thin out the gears if need be. However, my dimensions are all to the plans (other than potentially the base, but that doesn't have dimensions on it, so *shrug*), so who knows?
This one took a few days, but short ones. I made the flywheels! As my last post stated, I'll likely need to go back and remake the breaker-side one at one point, since I ended up cutting it too thin. The OD and inner features are also not alike, since I changed the design when I made the second one. However, It "works" well enough that I might just make doing this flywheel a future project if I decide to fix it up.
Here is one of the flywheels, I first set it up in the 4 jaw and turned the face and half the OD. The plans/guide say to hold it by the hub, but my chucks are too large for that. I tried to center based on the words, but that only turned out so/so. Both wheels were lopsided unfortunately, so I didn't get a chance to make them in a way that the 'USA' didn't get cut.
I also cut the hub. This is the side that faces the outside of the engine
I flipped it around in the 4 jaw and discovered the problem I was going to have: How to indicate this in.
This seemed to work out. machining the OD here ended up just about right.
And a couple pictures of the 'done' wheels.
Next I made the governor collar. This attaches to the inside of the flywheel and holds the governor balls. The drawings on this are a little confusing, but hopefully I made this right anyway.
I turned the OD and made the ID on the lathe. I initially didn't realize that the hole went all the way through (temporary brain fart!) so I did it with a boring tool, rather than starting with a drill bit.
Then to the mill! I cut away a bunch of the material. Those 'ears' will have pins in them to hold the governor arms. I also drilled the mounting holes in this setup using the DRO.
Then, the pin holes. This setup was tough, but I did it with a parallel under the ears that I removed when drilling.
I used a quare to setup this cut, which was to cut the clearance for the arms themselves. It actually lacked a couple dimensions, so I guessed. In retrospect, I probably should/could have cut this in the first operation, and just been OK with rounded IDs. I could have filed the arms round.
And the part done!
I set the flywheel up in the mill with the fly collar on it to find hte first hole. Since I used the bolt-circle tool on the DRO to cut them, I knew exactly how far they were apart. So this was as easy as finding the first hole, then just moving .887" on the Y axis.
And tapping the holes 2-56.
Here is how they go together!
And a few pictures with ALL of the pieces I have so far attached. You can see the flywheel differences in these pictures. However, spinning the flywheels seems to work the way it should!
So there we are! I'm a touch concerned that the thimble inside the collar doesn't have enough room to move enough to actuate, but I think I can remove some material from it if necessary. I could also potentially thin out the gears if need be. However, my dimensions are all to the plans (other than potentially the base, but that doesn't have dimensions on it, so *shrug*), so who knows?