Roll coupling #2

[Lewis, Richard]

Steven,
 
I assume the one post you refer to that did not deal with dihedral was
mine.  I hope you were able to look at the pictures of my Express (based
on Nat Penton's Voodoo Express).  If you were, you will have noticed
that the design of this plane is not conventional by any stretch.  I do
not claim to be an expert in aerodynamics or aircraft design and I am
still struggling to comprehend the specific aspects of the design that
contribute to the unique flying characteritics.  I was able to reap the
benefits of years of experimentation by Nat and I have an aiplane the
flies with very minute roll or pitch coupling with rudder application,
and has no effects from spiral slipstream.  I have not flown it in calm
conditions yet to be able to evaluate the amount of roll or pitch
coupling, but it I know it is almost negligible with the amount of
rudder required for straight and level knife-edge flight...
 
Some details that you may find interesting about my Express:
 
No Dihedral.
No Right Thrust or Down Thrust.
Wing is triple tapered and swept about 7 degrees.
Horizontal Stab is about 5 degrees anhedral.
Vertical stab has about 1/2 of it's area below the stab centerline.
Horizontal stab is about 3/4 degree negative.
 
Richard

________________________________

From: discussion-request at nsrca.org [mailto:discussion-request at nsrca.org]
On Behalf Of Steven Maxwell
Sent: Tuesday, September 20, 2005 9:18 AM
To: discussion
Subject: Roll coupling #2



 I ask this question the other day and got a few replies, all dealing
with dihedral, with one exception. Seems that there could be and is much
more to this. #1 Could the wing be moved up or down instead of dihedral?
2# Couldn't the rudder size and position,  sub fin added or reduced?
Sense the 2 piece wing offers less possiblities of changing dihedral
than the old one piece wing.
 Designers?
 Please reply to all and remove the sender.
Thanks 
 
 
Steven Maxwell
 

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