[BerntR]

Granted, well synchronized lag and coordination is important, but its not how Homer defined rhythm.

Homer defined rhythm as ...holding both lever assemblies to the same basic RPM. While he defines mechanical rhythm as holding all components ... to the same RPM

My guess is that Homer used the word basic his definition because there's a bit more to it than the mechanical definition. Perhaps in an effort to simplify the explanation. Or dumbing it down if you like. But you guys seem to have dismissed the difference Homer made here.