Author Topic: Rebuild time for my Upshur single  (Read 6919 times)

Offline Brian Rupnow

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Re: Rebuild time for my Upshur single
« Reply #30 on: March 30, 2020, 01:49:57 AM »
Good Show Art.--Isn't it great to keep on learning stuff. I fought that same fight when I built my first model engine in 2008. I simply couldn't get enough heat out of a propane bottle to work with silver solder. I immediately went to my oxy acetylene rig, and it has worked like a charm.---Brian

Offline Art K

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Re: Rebuild time for my Upshur single
« Reply #31 on: March 30, 2020, 02:28:15 AM »
Brian,
I must say there is something good about inheriting stuff from your parents.
Art
"The beautiful thing about learning is that no one can take it away from you" B.B. King

Offline Art K

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Re: Rebuild time for my Upshur single
« Reply #32 on: April 01, 2020, 03:40:02 AM »
Ok now that Post Image is back up and running I've got some photos.

I tried to solder the two short ends of the baffle pipes into the end caps to begin with.
Then I used some stock smaller than the center section of tubing to bend the solder around so I had a round piece to set inside the end of the tubing. Heating up the end cap till the solder melted. This worked very well. Then I did the same for the opposite end with an additional piece around the tube that goes through the end cap. Then heated that end. Here is the muffler to that point.

Then I soldered the mounting flange onto the remaining long end. This allows me to mount this to the head.

After some cleaning up, turning the OD of the end caps to size and radius on the corner here is the end result.
I think My next project is the connecting rod, but I need to figure out where the shop elve's have hidden the piece of 7075 I had set aside for the rod. I also am intending to bronze bush the rod bearing. Otherwise I think I will leave Hamilton's design alone.
More later.
Art
"The beautiful thing about learning is that no one can take it away from you" B.B. King

Offline MJM460

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Re: Rebuild time for my Upshur single
« Reply #33 on: April 01, 2020, 04:10:27 AM »
Hi Art, that looks like a really nice job of that silencer.

It will be interesting to see how effective it is when run time comes.

MJM460

The more I learn, the more I find that I still have to learn!

Offline awake

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Re: Rebuild time for my Upshur single
« Reply #34 on: April 01, 2020, 04:16:02 AM »
Very nice!
Andy

Online Kim

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Re: Rebuild time for my Upshur single
« Reply #35 on: April 01, 2020, 05:38:30 AM »
Beautiful soldering job!  And a very nice part!  :ThumbsUp: :ThumbsUp:
Kim

Offline Art K

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Re: Rebuild time for my Upshur single
« Reply #36 on: April 01, 2020, 11:50:23 PM »
Kim, Awake & MJM,
Thanks, now that I'm not at work anymore I can reply. I must admit it was a tedious process but the result was good. I did end up chucking it up in the 4 jaw to clean up the ends, yes I did heat one end to hot.
Art
"The beautiful thing about learning is that no one can take it away from you" B.B. King

Offline philjoe5

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Re: Rebuild time for my Upshur single
« Reply #37 on: April 02, 2020, 12:34:58 AM »
Nice work Art and it was great talking to you.  I have some more of that silver solder if you need it

Phil
If you pick up a starving dog and make him prosperous, he will not bite you. This is the principal difference between a dog and a man.  - Mark Twain

Offline Art K

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Re: Rebuild time for my Upshur single
« Reply #38 on: April 02, 2020, 11:02:40 PM »
Phil,
Thanks, it has been quite a project. In originally intended to finish it by names but that's not happening, maybe the Badger Steam & Gas show in August? Sure I can use more solder we can talk again when we're closer to coming out in July.
Art
"The beautiful thing about learning is that no one can take it away from you" B.B. King

Offline Craig DeShong

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Re: Rebuild time for my Upshur single
« Reply #39 on: April 12, 2020, 08:24:50 PM »
Hi Art, just catching up on this project.  Great progress, it all looks great.
 :popcorn: :popcorn:
Craig
The destination motivates us toward excellence, the journey entertains us, and along the way we meet so many interesting people.

Offline Brian Rupnow

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Re: Rebuild time for my Upshur single
« Reply #40 on: April 12, 2020, 09:01:59 PM »
Art--You have done a beautiful job on that muffler. I made one for my flat-head engine, and was quite surprised about how effective it was.---Brian

Offline Art K

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Re: Rebuild time for my Upshur single
« Reply #41 on: April 13, 2020, 03:50:36 AM »
Ok, I haven't sat completely still. I have been redesigning the cam. Trying to keep everything on center-line with the crank and the cylinder and block.

This is the finished cam blank. I did have one minor mishap, after finishing the first side pulled it out of the lathe to realize I had turned the wrong end and had to drill & tap the other end 4-40 as well. I just picked the wrong end of the print to read first. I am still thinking on what I want for a cam profile. I might add a larger nose radius to it and leave everything else the same.
Art
"The beautiful thing about learning is that no one can take it away from you" B.B. King

Offline Art K

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Re: Rebuild time for my Upshur single
« Reply #42 on: May 03, 2020, 02:57:22 AM »
Hi everyone,
After some problems I now have a new cam. I had the program written two weekends ago but, I had some problems with my mill and couldn't run it. I couldn't zero the Z axis on the mill. I had even run the program an inch above the part, dropped it down & had to shut it down before it crashed. At that point if I zeroed it, it changed the number to .3645, if I tried to edit the number it was changed to something like .3625. The program runs between Z0 and .073. At that point I gave up and asked my nephew if he could send me my PathPilot flash drive, which he did. I had intended to re install the PP operating system and updates and try again. A week later it still hadn't arrived. He's going to check on it and find out where it is. This morning wanting to finish the cam I fired up the mill and presto it worked, so the end result is this cam.

The dimensions are straight out of CamCalc. I had designed a different cam profile for the exhaust cam, but after the intake cam machined properly I didn't want to take a chance Murphy would show up and screw up my cam. So the settings in CamCalc you see in the upper left hand of the photo are the ones used in both. It was a lot of work to add 180 steps to the program but it does work, takes about 24 minutes and with a little editing will work on any cam profile. Adjust Z Y & X and you're ready to go. If anyone is interested let me know I will pass it on for others to use. I know it works on my Tormach and you would need a 4th axis these are my only disclaimers.
Art
"The beautiful thing about learning is that no one can take it away from you" B.B. King

Offline ironman123

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Re: Rebuild time for my Upshur single
« Reply #43 on: June 15, 2020, 12:32:30 AM »
Great work on the rebuild Art.   What is the distance between the cams?  Not sure if it was 0.250, 0.281.  I don't have my plans anymore.   I know I loaned to them to someone that wanted to build one after seeing mine.   To many years gone by.  Don't remember who it was.   I could get it close by measuring ctc between the cam followers on my engine and adding about 0.128 on each side of that.

I am wanting to redo my camshaft also.   When I built mine I remember the lobes were not the same, now I want to correct that.
Ray
Central Texas

Offline Art K

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Re: Rebuild time for my Upshur single
« Reply #44 on: June 15, 2020, 01:37:00 AM »
Ray,
I have slowly been working on the rebuild. I lately have been working on a new rod. It has been hard to get motivated to do anything on it recently. Work has been crazy busy and we are slowly treading backwards. I looked on the blank in Alibre and I did a centerline in the middle of the cam to center it on the crank and the block. The cam blanks are .230 wide and .145 from the center to the edge of the each of the cam lobes that comes to .290. I didn't open the magazine to look but I did design the cam based on the print. If you need any info to make a new cam I could help you with the prints as I have the Strictly I.C. magazines yet. If you have a cnc I have the program I used to make my cam lobes. If you don't like that profile you can go to Cam Calc figure out what you want and change my settings to suit your needs. If that would be helpful send me a PM and I'll send it to you, or any other info you need from the print.
Art
"The beautiful thing about learning is that no one can take it away from you" B.B. King

 

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