Karl, You are right - 62" or 1600mm is the standard diameter prop fitted to
the Europa. 64" or 1625mm is the maximum that Europa recommend or that PFA
will approve, at least for the mono and I doubt it would be more for the
tricycle.
If you have the SR3000 it will feather. Do you really feel that 3
blades will make a significant difference to glide performance when
feathered?
Regards, David Joyce, G-XSDJ
----- Original Message -----
From: "KARL HEINDL" <kheindl@msn.com>
Sent: Saturday, February 11, 2006 5:39 PM
Subject: RE: Europa-List: Propeller discussions
>
>
> Paul,
>
> Are yu sure about the 72"?. I am not near my Europa at the moment, but I
> could have sworn that that should read 62".
> I had investigated the Hoffmann (also German) propeller, because it is
widey
> used on certified aircraft with Rotax, i.e. Katana, Dimona and other
> motorgliders. It is 2-blade, cs, and feathering.
> It is unlikely to be interesting for the Europa because: it is hydraulic,
> twice as heavy as the Airmaster setup, and twice as expensive as the
> Airmaster.
> As far as I know, Airmaster don't actually make propellers. They make the
> AC200 control box and electronics etc. and fit it with the Warp Drive.
> I am also planning to upgrade this year and my present choice is the new
> Woodcomp SR3000 with twin-blade of 170cm (67"). Anything longer would not
be
> wise on the Europa, and definately not on the mono. Reason for the 2-blade
> version is reduced drag whenever I am in glider mode (one of these days).
>
> Karl
>
>
> >From: "Paul McAllister" <paul.mcallister@qia.net>
> >Reply-To: europa-list@matronics.com
> >To: <europa-list@matronics.com>
> >Subject: RE: Europa-List: Propeller discussions
> >Date: Sat, 11 Feb 2006 07:21:03 -0600
> >
> ><paul.mcallister@qia.net>
> >
> >Jeff,
> >
> >I just looked at the manual and under Maximum diameter they have 72" /
183
> >cm, but then under that they state the weight and in brackets "Data shown
> >for 64" diameter and 10" spinner"
> >
> >So.... I don't really know. You would think that you get a reduction in
> >diameter for increasing the number of blades for a given HP capacity.
> >
> >My interest in this whole topic is two fold. John Hurst once told me that
> >the Whirlwind propeller was good for an additional 20 knots at 17,500'
over
> >the Airmaster. At first glance this doesn't make much sense, usually a
> >multi bladed propeller is more efficient at altitude. John agreed but
> >seemed to think that the Warp drive blades were just not very efficient.
> >Given that no A:B comparisons were made as a controlled experiment, then
> >its
> >just an opinion.
> >
> >Most of my flying is long cross country trips, typically in the 500 ~ 800
> >nm
> >range. A propeller that would give me 20 more knots at altitude is
> >seductive.
> >
> >My other interest in the whole topic is service, 6~8 week cycle times
isn't
> >very good. I suspect that from the US the issue same issues would exist
> >for
> >the European sourced products. So, am I about to spend +6k for another
> >propeller that might go faster and can provide local service.... probably
> >not, but I am just curious as to why the MT has never caught on in the
> >Europa community.
> >
> >Cheers, Paul
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
>
>
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