> Paul,
> I'm very new and green to your world of propellers and reduction drives.
> Take a look at my edited version of one of your boxes on your sight to
> possibly run a hydraulic constant speed propeller.
> Sorry for the poor diagram but on holiday with my lap top.
> Let me know if i'm on the right track, and what pressures we need to
> work on to get the pitch of these props to change.
> Craig South Africa.
>
> Whats happening, are you shell shocked at how easy this could be.
> Craig South Africa
>
>
> Intersting idea but the screw pump will give a linear change in pressure
> (assuming it works) with RPM from zero on up but that is not what
> you need. A fly ball gov is a bang bang servo centered arround some
> RPM in the range of 2000 to 2500 RPM. Put "bang bang servo" in google.
> A flyball gov is not really a proportional servo. You might get
> "hunting". It might be worth a try anyway.
>
> Paul Lamar
>
Paul,
The screw pump could be machined to give us a constant pressure of 400

psi.

Your NT prop governor, which i presume controls a bypass valve regulating
oil pressure to your prop according to your engine RPM, can be installed

to

regulate the pressure against rpm.
Have you received my edited attatchment.
Craig


Here it is.

Paul Lamar

Paul,
Found info. on MT prop governor. I assume this governor work's on your
propeller rpm and not engine rpm with a 1:1 ratio. Do not indicate this in
their manuals.
Craig SA

The gov is normally geared off the prop shaft. I am not sure what speed it
runs at. I would not be surprised if it was running at
prop RPM. This is a picture of the MT Gov driven off the nose
of a Chev V8 crank shaft. the PSRU is 2.2:1. In this case it looks
like it is running at prop RPM because it is geared down.

Paul Lamar