Well, I haven't heard that one, but I didn't study many biplane
configurations during my aero engineering training...
I do know this...Decalage is in fact the correct term, and is the difference
between the angle of *incidence* of the wing and the horizontal stabilizer.
These angles are of course both measured from a common "horizontal"
reference line.
Angle of attack is something entirely different. It is generally
defined as the angle between an object's horizontal reference plane and the
freestream airflow direction.
Somewhere at home I have an old (1979) issue of Model Builder,
with an excellent article on the subject of sailplane design.
The method uses simple guidelines for establishing reasonable
upper and lower bounds for things such as tail areas and moments.
I used it to design a standard class model back then when I was 16.
It flew great. I might be able to find it...
I also have the Martin Simons book, titled something like
Model Aircraft Aerodynamics. Good book. I ran across it at
Barnes & Noble of all places.
Andy
>From: Mark Miller <[EMAIL PROTECTED]>
>To: Aerofoam <[EMAIL PROTECTED]>, RCSE <[EMAIL PROTECTED]>
>Subject: Re: [RCSE] info on decalage
>Date: Fri, 29 Jun 2001 14:50:34 -0700 (PDT)
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>From [EMAIL PROTECTED] Fri, 29 Jun 2001 15:34:00 -0700
>Message-ID: <[EMAIL PROTECTED]>
>In-Reply-To: <015c01c100d8$57d81740$22edfc9e@computer>
>
>Going back to my aeronautic training, decalage is not
>quite the right term. Decalage is the difference of
>angles of attack on the two wings of a biplane. The
>Angle of incidence is the difference of the angle of
>attack between a wing and horizontal stabilizer. I'm
>not one to pick nits but this one has always bothered
>me.
>
>Mark Miller
>
>--- Aerofoam <[EMAIL PROTECTED]> wrote:
> >
> > > does anybody have any idea where i could find a
> > book or say a website
> > > that has equations or rules on finding the amount
> > of decalage, tail
> > > moment, etc. for purposes of designing your own
> > planes?
> >
> > Use full flying stabs and you won't need that info!
> >
> > Mark Mech
> > [EMAIL PROTECTED]
> > www.aerofoam.com
> >
> >
> >
> >
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