Gallery, Projects and General > Project Logs
a nine cylinder radial engine, plans by "ageless engines"
madjackghengis:
Well, my good friend and mentor George, who finished his appreticeship before I was born, stopped by yesterday, and we had a nice chat, considering whether to start fresh on the crank cheeks, or do something. I figured out I looked up the right drill to precede the reamer, but pulled the wrong one out of the index, and that was why the crankpin hole was nasty and oversized. As usual, George was practical and decisive, and told me, were it him, he'd put the block back in the vise, square it up nice an do a minimum boring with a boring head, since there is plenty of room between the finished bored holes at 0.382, and the crank pin o.d. of 0.562, and I decided if it was good enough for George, who was I to question it.
After boring, cutting the cheeks down to size on my shaper, breathing in the glorious fumes of dark, sulferated, lard cutting oil.
Making smoke, and hot blue chips flying, you've got to love a shaper :clap:
cutting the other side, centering the holes.
Partially finished cheeks, ready for more operations
Another view of the cheeks, showing the steps.
Now to finish the profiling of the cheeks, install the prop shaft, make a rear shaft, and make a crank pin. All in all, not too bad for a some parts already written off. To err is human, but to really screw something up takes government management! ta ta for now, Mad Jack
madjackghengis:
As I grunt my way through the crank shaft, it seems like a never ending project, in and of its self. Not satisfied with the design of the designer, but having to wonder if my own ideas are ones already tried and found less than effective, but without experience yet to have a clue. The crank cheeks are done, the prop shaft is pressed in place, permanently, I hope, and now I have to start making the last two shafts to finish of the Crank Shaft, and move on. Here's some pictures of the forming of the cheeks, and the machines used.
cutting the retangular blocks to put a taper on both sides, lightening the crankpin end, and leaving the counter weight end heavy
another picture with the cheeks in the shaper vise and the sweet aroma of black sulferated lard cutting oil smoke
having made a stub arbor for them, turning the radius on the counter weights on the lathe
Cheeks finished, with the radius on the crank pin end rough ground, and then finished with a hand file to a good looking contour
the cheeks with the stub arbor used for the radius
The front cheek with the prop shaft pressed in place with half a thousandth press fit, and loctite 609
another shot, and showing the rear cheek, waiting for its shaft to be made and fit. Once the shaft is finished, assembled, the rear bearing turned, then disassembled, then on to the master connecting rod. Hopefully I can get the two shafts finished, and all oil passages drilled, and start on that rod soon. Good day all, mad jack :beer: :coffee:
zeroaxe:
Wow, good job as usual. But then again, you know that already, right? :)
I have a question about the shaper. Never known such a machine exist before joining this forum. So..... How does it work? Does it work in/with a swinging action back and forth? Or does the cutter do a full 360° turn? :scratch:
Watching this space..... Cant wait to see this engine running :headbang:
Stilldrillin:
--- Quote from: zeroaxe on March 18, 2010, 02:45:38 PM ---Wow, good job as usual. But then again, you know that already, right? :)
I have a question about the shaper. Never known such a machine exist before joining this forum. So..... How does it work? Does it work in/with a swinging action back and forth? Or does the cutter do a full 360° turn? :scratch:
Watching this space..... Cant wait to see this engine running :headbang:
--- End quote ---
Here you go........
But, it`s running backwards......... ::)
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David D
sbwhart:
Great bit of work Mad Jack
Stew
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