Crankshaft balance

"stol" wrote in message
oups.com...

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Look close at the Lyc / Cont cranks and you will see balance marks on
the rod throw end. As you have pointed out they don't have counter
weights so thats the only logical place to correct a large imbalance
that happens during the crank forging process.

Yes, you have noticed the factory and aftermarket balance marks. Have you
ever checked the depth of material removed?
How deep is the nitride layer usually?
What do you do about the bifilar dampers that most higher horsepower
crankshafts have?
It is a misnomer that these are commonly called crank counterweights.
You install new bushings and rollers? Do you balance with them
installed on the crank? What about a Lycoming ring gear?

btw, thanks for your three reply posts for "setting me straight".

Kent Felkins
Felkins Aircraft Ltd.
FAA CRS WNKR918K
Tulsa Oklahoma

Kent Felkins
Felkins Aircraft Ltd.
FAA CRS WNKR918K
Tulsa Oklahoma

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I was just giving out my two cents worth. After all this is the Rec,
Aviation, " HOMEBUILT" site. I would never post something like this on
the rec. aviation "certified" site. After all the FAA knows all.I still
think Lycoming murdered 13 people by selling a inferior product and the
FAA was in bed with them the whole way. I have owed several certifeis
planes in my life and I never want to see a yellow tag again. Those
things have tried to kill me a couple of times and the funny thing is
the Feds didnt even investigate the repair stations involved. Now I
will head at and fly my homebuilt plane powered by a Firewall forward I
designed and built. The air is good and thick at -34f. Peace and Merry
Christmas from Jackson Hole Wy

Ben
www.haaspowerair.com