Quite a few years ago I was fortunate to have an extensive tour of a turbine engine repair facility, not propjet.
Each turbine blade was weighed to some really fine degree (.001 gram?) and the spools were assembled in a particular pattern to ensure the best balance.
I don't remember if any further fine-tuning was done after final assembly, but was impressed by the cleanliness and precision of the whole procedure.
f
PS
Peter,
I don't think adding weights to a "rim" in a turbine is a normal procedure, I think that would be a bit crude.
f
Last edited by fleigle; 2nd November 2012 at 01:57.
Reason: adding PS