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From: "Marvin Kaye" <marv@lancaironline.net>
the firing pulses are simply the "exciters"...
Think about a guitar or piano string...
The single rotor e-shaft is a little stubby
thing, with much more torsional rigidity than that of a 2-rotor. Ergo,
its
resonant torsional frequency is probably considerably higher than the
2-rotor's. Further, if you consider the resonance of the total system, if
any
one component has a higher resonant frequency then the total system's
resonance goes up with it.
(Much snipping..)
Ah yes, thanks Marv. I can picture the two shafts side by side but made
into tuning forks, the frequency difference becomes obvious. I was thinking
of the
firing frequency rather than the "ringing" frequency of the shaft.
Think about the discussion here to date... if the
drive coupling (one component) is tight and stiff, the system's resonant
freq
is raised. Loosen up or soften that coupling, and the system's resonant
freq
is lowered, which, as Tracy has so eloquently explained, is the reason
that
his drive system works so well.
Being a well read Tracyphile I wouldn't think of rocking the boat but I
thought I
understood that the torsional had to be sort of "let out" or allowed to move
and
not connected solidly to anything, vis a vis the dyno shaft blow up in
Tracy's writings.
Otherwise, by George, I think I've got it!
Great Info, Thanks,
Tony
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