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a nine cylinder radial engine, plans by "ageless engines"

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sbwhart:
Great work with the crank Jack  :clap:

When you see the assembly of the crank case it sure looks impressive.

Cheers

Stew

madjackghengis:
Thanks Stew, I feel like part of a model engineering club.  I've been happier in my "projects" in the last few months than ever before, it's nice to see other's work and to have your own work viewed, commented on, and suggestions made when walls are hit.  I have a feeling I'm going to get some things I've put off for a long time, done, because of the extra motivation and the interest watching all the other projects brings out in me.  I'm really looking forward to the starting on the connecting rods, starting with the master rod. :nrocks: mad jack

cedge:
Jack...
Having seen one of these up close and personal, I'm in awe of the complexity of the project and the fit and finish you're bringing to it. For all the kind words you've spilled on me of late.... all I can say is.... "Back Atcha Dude". Incredible work!!

Steve

madjackghengis:
And thank you for the complement, Steve, much appreciated.  The crankshaft had to be disassembled for more work, and I found the front shaft bent again, so a new one was made out of completely different material, and looks to be the last one for this engine, hopefully.

Along side, you can see the last four front shafts, only two of which ever got in the crank.

Another shot of the crankshaft and bad shafts

At this point, I'm ready to see about the master rod, so I can assemble the crank shaft for its last time and be done with it.  Once it is in place, I should not have to take the crank apart unless I have a catastrophic failure.  We kind of hope that won't happen.  While the drawing is pretty clear, I suspect I will only be using it as a guide, and will make modifications along the way, as all the other parts have experienced.  Tally Ho, and on with the project, as Cedge said, a minute or eight hours, it doesn't matter, it's being in the shop.  or something like that.  I came home last night with a crankshaft in the case that barely turned, and having turned it by hand all evening, it spins over very nicely and should do well with pressure oil fed to it.  ta ta for now, mad jack

madjackghengis:
Well, I started on the master rod yesterday, it calls for a chunk of 6061 .750 thick, three and three quarters long, and an inch and five eighths wide.  I have half inch, and one inch, but no three quarter, so a chunk of "jig plate" aluminum plate which has been surface ground on both sides, was found in the cut off pile, being nothing like rectangular, I cut out a piece big enough, laid some lines on it, and milled two sides parallel, and both ends perpendicular, and then put it on parallels to drill and ream the crank pin location, and the wrist pin hole.  Then I started flycutting the first side to thin it down to three quarters

to keep the sides parallel, I cut about forty thousandths at a time, taking an eighth off the first side.

second cut

last cut on first side

first cut on second side

getting close

miking the blank for the final cut

Having drilled and reamed a quarter inch hole to locate the crankpin hole, and drilled and reamed the wrist pin hole, time for the four jaw

After using a quarter inch pin in the tailstock chuck to get the blank pretty much in place, the last few thousandths of centering is done with an indicator

another shot at the centering, and the end of the day

maybe the crank will be a one time proposition, it'd be nice, at least the blank is on size, and in place.

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