Subject: Coot crash.
From: ACRE NL
Date: 6/24/2002, 8:15 AM


Dihedral canard ? Chrissi? I think that Nat would prefer that the nameplate
reflected some other name
However in the pattern and talking to the tower what you say is very true.
Vance


Vance1,
The dihedral canard has an interesting history. As related to me by another
gentleman named Vance2, he was the first to adopt the newer Roncz canard. The
original GU canard as implemented by Rutan had issues with bugs or rain... it
lost lift. When Vance2 talked to Roncz about the "rain canard" Roncz
intimated that while doing computer simulations that 3 deg of dihdral might
add a few knots as well as get the tip vortexes up and away from the main
wing; improving roll rate. So Vance2 implemented the first dihedral canard.
So although the Roncz canard is now standard, few have adopted the dihedral
due to the 10% challenge to get 1% better performance. Seems to me Roncz is
the greater expert in this case. As to the modification, it has been tested
and flown. If no other improvement materializes it has proven to add a small
amount of stability.
And finally, after a few encounters with Nat on other issues I don't give a
rat's ass anymore what he thinks, it's a Cozy, it looks like a Cozy, it was
built from Cozy plans, I paid for the rights to build it. No where in those
plans or agreement did it specifically say that it must be registered as
anything else. Secondly, a rule has to be applied equally. While he has
condemmed planes with parts made by x-y-z company as "bastardized ripoffs"
(x-y-z company president and I decided these should be registered as
"AeroBastards") and then a plane with those same parts wins Grand Champion
and all of a sudden he's Nat's best friend and the plane is a Cozy and gets
published in the Cozy newsletter.
Just from the recognition and safety point of view, the name stands.
...Chrissi

Cozy Mk-IV 13B-turbo
 www.CozyGirrrl.com

I have always been mildly curious about how the canard tip vortices affected
the main wing. If placed properly to pass over the main wing they should 
enhance main wing lift.

Paul Lamar
 
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