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At one time in my past I flew the L-188 (Electra)
for a few years. It has the same engine as the C-130. That engine
ran at a constant RPM of 14,100. It was directly geared to the propeller
and power was instaneous. I believe the Garret is also a constant RPM
engine (no experience). I am still a year or two from flying my IVPT so I
can not add any personal experience to the discussion. The fact that the
engine idles at +/- 61% may negate turbine lag. The
problem may relate more to the fact that so much of the power is produced in the
last part of the RPM range. I have flown is aircraft powered my the Walter
601 that utilized a power quadrant that was very sensitive to any
movement. That can also play a factor.
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