----- 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
> >
>
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