Did you even bother reading the article, or are you
just one of those old flyers like an old dog who can't
be taught new tricks or new technology? let me guess,
you probably don't even have a cordless phone yet,
right?
--- Rick Brown and Jill Wiest <[EMAIL PROTECTED]> wrote:
> If I understand gyros correctly I would like all the
> flyers to use them,
> except me of course.
>
> It should enable a TD plane to fly right through a
> thermal and due to
> the gyro resisting change, give no indication of it
> at all.
>
> Yes? No? Maybe?
>
>
>
> J S. wrote:
> >
> > I am curious, do you mean in contests? This
> doesn't seem like it would be
> > legal.
> > Is there a rule about having a plane equipped with
> a gyro?
> > To me it seems to take all the talent and
> challenge out of td flying.
> > Any comments?
> >
> > >From: B R <[EMAIL PROTECTED]>
> > >To: [EMAIL PROTECTED]
> > >Subject: Re: [RCSE] Poly angle...Gyro's
> > >Date: Sat, 20 Jan 2001 15:28:31 -0800 (PST)
> > >
> > >
> > >Interesting article about Gyro's. Dose anyone use
> > >Gyro's for there t/d planes? If so I would like
> to
> > >know everything about you success or failure.
> > >Dose it aid in landing, and coring thermals?
> > >
> > >
> > >
> > >
> > >--- Blaine & Deborah Beron-Rawdon
> <[EMAIL PROTECTED]>
> > >wrote:
> > > > In Soaring 2161, Dave Seay asked "Is there any
> > > > science in determining the
> > > > angle of the poly break and/or its location
> out from
> > > > center?"
> > > >
> > > > Well, it may not be science, but there is some
> > > > engineering involved!
> > > >
> > > > To summarize, the amount of dihedral (or
> polyhedral)
> > > > that a rudder and
> > > > elevator (no ailerons) sailplane has is a
> major
> > > > factor in its roll
> > > > responsiveness and maximum roll rate, and
> strongly
> > > > influences spiral
> > > > stability. More dihedral increases roll
> > > > responsiveness, roll rate and
> > > > spiral stability. Airplanes with more
> dihedral also
> > > > require larger vertical
> > > > stabilizers.
> > > >
> > > > The exact arrangement of the dihedral, whether
> it is
> > > > two-panel dihedral or a
> > > > six-panel polyhedral for instance, is less
> important
> > > > than the effective
> > > > amount of dihedral that the arrangement
> provides.
> > > > The effective dihedral of
> > > > any arrangement can be estimated and is
> commonly
> > > > referred to as "equivalent
> > > > dihedral angle" (EDA). For what it is worth,
> I
> > > > recommend at least 12
> > > > degrees of EDA for most rudder and elevator
> > > > sailplanes.
> > > >
> > > > The arrangement of the panels is a compromise
> > > > between efficiency while
> > > > thermalling, efficiency in a rolling maneuver,
> and
> > > > stall characteristics
> > > > while thermalling. In short, arrangements
> that
> > > > resemble a parabolic
> > > > dihedral distribution provide a smooth and
> efficient
> > > > lift distribution
> > > > across the span while thermalling, and avoid
> large
> > > > variations in lift
> > > > coefficient across the span in a steady-state
> roll
> > > > maneuver. This is good.
> > > > Arrangements that have at lot of dihedral
> > > > concentrated in the outer panels
> > > > will tend to tip stall prematurely while
> > > > thermalling.
> > > >
> > > > Equivalent dihedral angle is explained at:
> > > >
> > > > http://www.rc-soar.com/tech/spiral_eda.htm
> > > >
> > > > Envision Design sells software called "Plane
> > > > Geometry" that enables easy
> > > > experimentation with dihedral arrangements.
> Check
> > > > out:
> > > >
> > > >
> >
>
>http://members.home.net/evdesign/pages/plane_geometry.html
> > > >
> > > > That's all for now.
> > > >
> > > > Blaine Beron-Rawdon
> > > > Envision Design
> > > > San Pedro, California
> > > > http://members.home.net/evdesign/
> > > >
> > > > RCSE-List facilities provided by Model
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> > >
> > >
> >
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