Hi! Guys.
I would just like to put a penny's worth in here..... IMHO when using a VP
propeller it's most coarse setting should be the minimum "GO ROUND" setting
in the event of system failure. It also follows conversly that a fully
fethered propeller (that is maximum fine for best glide) should not be
beyond a "Go round " either ?
Sorry if I'm stating the obvious!
Regards
Bob Harrison G-PTAG Europa MKI 337 /Jabiru 3300/ MT Constant Speed
Propeller.
-----Original Message-----
From: forum-owner@europaclub.org.uk
Subject: Fw: [Flying] Best Glide
----- Original Message -----
From: david joyce <davidjoyce@beeb.net>
Subject: Fw: [Flying] Best Glide
>
> ----- Original Message -----
> From: david joyce <davidjoyce@beeb.net>
> Subject: Re: [Flying] Best Glide
>
>
> > Tony, The other side of this particular coin is slowing down when you
> reach
> > you paddock. No doubt everyone with any sort of VP prop has noticed what
> an
> > extraordinary difference it makes to your ability to slow down and get
> onto
> > the ground whether your prop is fully fine or fully coarse. Landing
with
> a
> > feathered prop must be a bit like landing a glider without airbrakes -
> > liable to make a large hole in the far fence of the paddock! I am not
> > against feathering props but would be hesitant to use one in almost any
> case
> > of engine failure in this country where you are lucky to find a field
400
> > yds long. Regards, David
> > ----- Original Message -----
> > From: Tony S. Krzyzewski <tonyk@kaon.co.nz>
> > Subject: [Flying] Best Glide
> >
> >
> > >
> > > Yesterday we did some glide testing on ZK-UBD and ended up with some
> > > rather interesting results. Remember that ZK-UBD is a Classic
monowheel,
> > > has no fairings, and that all the tests were being performed at MAUW.
> > > We were able to repeatedly show that the rate of descent improved by
> > > around 90% when we feathered the prop compared with the engine just
> > > idling across a wide range of speeds. On ZK-UDB we ended up with a
best
> > > glide speed of 70 knots IAS at 520fpm with the prop feathered. With
the
> > > engine idling the rate of descent at 70kias was 1100 fpm.
> > >
> > > For those with Airmaster featherable controllers this is worth
> > > remembering if you ever have an engine failure. It may mean the
> > > difference between reaching that paddock and not reaching it!
> > >
> > > Tony
> > >
> > >
> > > The Europa Forum is supported by Aviators Network UK
<info@avnet.co.uk>
> >
>
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