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The auto prop on the 109s is not like that however.
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NO...You have confused automatic devices.
The
VDM hydraulic electric propellers are CSP in hydraulic mode and variable pitch in electric mode.
Schwarz-man, whom I know and he is correct in his explanation of how the SYSTEM works.
He is describing the interaction of the CSP PROPELLER with MANIFOLD PRESSURE of the ENGINE!!
This eliminated the pilot from having to adjust PROPELLER RPM as with ANY CSP and then have to adjust ENGINE MANIFOLD PRESSURE.
It reduced his workload when compared to a using a CSP on regular aircraft engine with manual controls.