The Craftmans Shop > Model Engineering
Side Valve i.c. engine from Bar stock
Brian Rupnow:
So--Ladies and Gentlemen--Here we have it!! My very first, two piece pressed together crankshaft. One picture shows the two pieces separated with the needle bearing for the big end of the con rod laying between them. The second picture shows the two piece crankshaft assembled with the needle roller bearing setting in its place. Each end of the crankshaft is supported by two bearings or bushings. The force from the con rod is totally transmitted through the 3/8" thick web plate to the large side of the crankshaft. The"free" end of the con rod journal engages with a slip fit hole in the other web and drives the smaller diameter side of the crankshaft, which operates the timing gears and the ignition points.
Brian Rupnow:
So, here's a view "Down the hole" as it were. The crankshaft fits in nicely, nothing rubs or scrapes when rotated through 360 degrees. There is one tight spot in the rotation, but it's only a minor tight spot which I'm sure will wear away once the engine is ran for a few minutes. There are supposed to be spacer rings incorporated into the crankshaft, just behind each web, but I'm going to wait until I have the cylinder, piston, and rod in place to determine their final thickness.
Brian Rupnow:
And now, since I have the material setting right here on the corner of my desk, I think I will machine some bronze.
Stilldrillin:
Looking good, Brian! :thumbup:
David D
Brian Rupnow:
No machining today. I did however work 8 hours in a design office across town, rush home, gobble supper, drive to new house, install 3 smoke/carbon monoxide detectors, put new locksets (without keyholes) on two doors, measured up the partially rotten deck for new planks as required, and remove one door and bring it home to trim the top so it will close properly and install a cat door. Now I'm going to drink my herbal tea and go to bed!!!
Navigation
[0] Message Index
[#] Next page
[*] Previous page
Go to full version