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Bill,
Tracy considered doing that at one point. I believe when
he realized most Hydraulic controlled props required much higher oil
pressure than the 60-70 psi our oil system produces, he decided he
didn't want to have to produce a Prop controller to provide the required oil
pressure.
Here is a excerpt from the MT propeller site regarding
hydraulic pressure typically required.
The servo pressure necessary for changing pitch is
generated by a gear pump located inside the propeller
governor, which increases the oil pressure supplied by the
engine by factor 6 or higher.
Ed
----- Original Message -----
Sent: Monday, December 18, 2006 11:46
PM
Subject: [FlyRotary] Re: hydraulic
constant speed prop for rotarys
Dave, if you go with a Mistral PSRU you can run any Hyd/CS you want. I'm
supprised Tracy hasn't gone to a hollow shaft on his PSRU since he runs a big
plain bearing he could set up a port for a CS prop.
Bill Jepson
HEY! That's like saying that the store is giving out free ice
cream but not telling us which store.. :-)
Dave Leonard
On 12/18/06, lou
rubin <grdflyguy@yahoo.com> wrote:
While
we are on the subject of props I want to bring
to the groups attention
we are installing a constant
speed hydraulic prop on a SA2 hub with
Tracys 2.17 RD
The prop is very similar to MT design except its
about
half the price & actuated hydraulically instead
of
electrically. Im the past we havnt had any other CS
prop options
except the electric because we dont
incorporate a hollow crankshaft as
our Lycoming &
Continental cousins . We are mounting the prop on
a
20B in a Lancair ES however, it could be just as
easily
installed on a 13B as well We will keep you
posted on our
progress
We will be selling our IVO Magnum if there is
anyone
interested & possibly the 2.17 RD in the
future
Lou N117ES
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