I looked in the Simons book yesterday, and lo and behold, he
states exactly what Mark Miller said... and I couldn't find a
definition in my college texts on aerodynamics and aircraft design...
What the heck, maybe its my memory that's foggy - I don't know
at this point where I learned it, but I could have sworn it was
the wing/tail thing.
>From: Howard Mark <[EMAIL PROTECTED]>
>To: 'Mark Miller' <[EMAIL PROTECTED]>
>CC: "'[EMAIL PROTECTED]'" <[EMAIL PROTECTED]>
>Subject: RE: [RCSE] info on decalage
>Date: Mon, 2 Jul 2001 08:47:53 -0600
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>From [EMAIL PROTECTED] Mon, 02 Jul 2001 07:59:27 -0700
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>
>Mark,
>
>I used to have the same attitude, as I was told the same thing about
>biplane
>wings. But I've seen decalage used many times in the context of the
>difference in mounting angles of ANY two flying surfaces. Wing-wing
>(biplane) is just one use of the term; as is front canard to main wing, or
>main wing to horizontal stab.
>I also checked in the Pilot's handbook of Aeronautical knowledge and it
>refers to the angle of incidence as the angle of the wing relative to the
>reference line (airplane's longitudinal axis) - NOT to the horizontal stab.
>Of course whether or not the horizontal stab is mounted along the same
>reference line depends on the its airfoil and the intententions of the
>designer.
>So you see, you should not be bothered at all by this useage of the word.
>BTW - one should NEVER mention angle of attack unless it's measured against
>a relative wind.
>(and how often have you wanted to attack relatives letting wind?)
>
>Mark
>
>-----Original Message-----
>From: Mark Miller [mailto:[EMAIL PROTECTED]]
>Sent: Friday, June 29, 2001 3:51 PM
>To: Aerofoam; RCSE
>Subject: Re: [RCSE] info on decalage
>
>
>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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