The Airmaster prop controller supports many modes of operation,
including;
1) Preset constants speeds for TakeOff (~5700 rpm), climb (~5500 rpm),
and cruise (~5000 rpm).
2) Hold (in auto mode), which allows you to select (via a toggle switch)
any rpm you choose for constant speed operation. I suppose there is a
lower limit to the selectable rpms, but I believe it can go down to 4000
rpm.
3) Manual mode, which creates an air-adjustable-pitch prop.
4) Feather mode, which should be self explanatory.
It sounds like you want mode 2) which allows constant speed operation at
any rpm you choose. Making the controller automatically set rpm's
relative to MAP/altitude/etc sounds like a fun project, why don't you
build one? A PIC microprocessor and some code, a little interface
circuitry, ...piece of cake.
Regards,
Terry Seaver
A135 / N135TD
-----Original Message-----
From: owner-europa-list-server@matronics.com
[mailto:owner-europa-list-server@matronics.com] On Behalf Of josok
Subject: Europa-List: RE: Constant speed was Fuel smell 912S XS front
fire wall
As i understand from Cliff, the rpm is not reduced but stays at 5000.
That is with the preselect setting at cruise. The rest seems to be a
manual job, little better then full manual, which is a far from ideal
situation.
What i am after is a governor that selects the best rpm and map settings
at a certain power setting from the many available combinations. I
would expect from an intelligent controller to do the difficult stuff,
like finding the best setting out of all combinations of rpm, map and
throttle settings, maybe even based on fuel flow.
It's like the difference between a wing leveler and a state of the art
autopilot.
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