Good work on the Upshur.New Crank Shaft, the original one i did isn't quite straight which is a little bit of an issue. Have taken my time with this one and trammed the mill very well before i started. So far so good.View attachment 101720
Also glued in spacers to keep it square while the loctite dried, will check it's straight again, and then loctite pin it all together before tapping off the super glued supports.View attachment 101721
Good work on the Upshur.
Suggestion: When you make your next built-up crankshaft, use a full-length main shaft which will automatically keep everything aligned. When everything is Loctited and pinned, then you cut out the sections of the shaft between the cheeks of the throws. Straight-sided pins are usually not a good fit. Use tapered pins which will guarantee a tight fit. Yup, they are more expensive and you need a tapered pin reamer but the results are much stronger.
Good looking engine!
Model Engine Builder magazine.
Hi There,Hi Guys,
Here is the story of my Upshur twin so far, this is my first full construction of an engine and massive learning curve all rolled into one. I'm sure along the way as i tell the story you will be rubbing your head saying "no Pat, not that way" and then hopefully by the end of it i will be doing it the correct way. If not i'm open to any suggestions please
The plans were sourced from my favourite publication model engine builder magazine out of issues 7 and 8. The only head scratcher i have had with the plans is changing from imperial to metric, but other than that so far it has been smooth sailing.
My tooling of choice is a Sieg C2 lathe which i have had for about 12 years now, and a Sieg X2 mill which i have had for two years now. When i started this engine i had just purchased the mill and had watched a lot of video's, but only had the pleasure of working with a mill once before. So it was a steep learning curve and lots of 'practicing" before i could get stuff right. I also recently fitted some basic DRO's onto the mill to assist which cost me just over $100AUD
Attached is the picture of my current setup, sorry for the mess as i was not intending for anyone else to see this pictures, I had taken this picture after installing a basic extraction system which is currently folded down for both the lathe and mill, but i fold them both up and only fold down what i need, when i need it. This was being used when i was cutting steels that were very smoky, originally i have been using things like WD40 and similar products, while recently i have changed to using a water based cutting fluid which is a lot nicer to work with and a lot less smelly and smoky. (Ahh if only i had known back then what i know now....)
View attachment 85972