Next revolution in pattern planes?

[Fletcher, Richard]

I heard that Prettner felt that he needed to lower the stab to get it out of
the wing's wake and did not want to cut it out and reinstall it so simply
cut the two halves off and glued them back on at a downward angle. I built
and flew Hobby Barn glass fuse, foam wing Curare back then when I was just
getting started in Sportsman. I thought the anhedral stabs looked very cool.
I also heard that these planes had tracking problems in crosswinds because
the stabs presented more side area to the wind which caused the tail to
bounce around more.   
 


Thanks, Rich 





-----Original Message-----
From: discussion-request at nsrca.org [mailto:discussion-request at nsrca.org] On
Behalf Of Karl G. Mueller
Sent: Friday, December 31, 2004 10:36 PM
To: discussion at nsrca.org
Subject: Re: Next revolution in pattern planes?


Matt,
 
You were close. The year was 1977 and the location was Springfield, Ohio.
That was the year a twister went through the competition site the night
before
and tore down, among other things, one of the tents that was used to store 
the models in. It was quite a mess, but the contest went ahead as scheduled.
 
 
Karl G. Mueller
kgamueller at rogers.com <mailto:kgamueller at rogers.com> 


----- Original Message ----- 
From: Rcmaster199 at aol.com <mailto:Rcmaster199 at aol.com>  
To: discussion at nsrca.org <mailto:discussion at nsrca.org>  
Sent: Friday, December 31, 2004 9:35 PM
Subject: Re: Next revolution in pattern planes?


Anhedral stabs are affected by crosswind more than flat stabs. At least for
the kind of flying we demand. The Prettner Curare design, World Champ around
1976 or so, introduced the feature to models. By virtue of its being World
Champion model, everybody copied it. Sort of the way fixed gear took over
from retracts, except fixed gear have persisted far longer and serve the
intended purpose well. 
 
Curares and other anhedral stab designs flew well into the 80's but
eventually the fad died down. 
 
Naruke san is possibly trying to cure some aerodynamic inadequacy by
employing the feature again. Or maybe just likes the look. It does look Kool
as hell. I doubt that this is a revolution though; more like evolution....in
reverse
 
MattK
 
In a message dated 12/31/2004 6:54:03 PM Eastern Standard Time,
rcaerobob at cox.net writes:


Beautiful plane, but planform is BTDT, remember Hanno??? And the Bridi UFO?
And others.  The anhedral stab really introduce bizarre characteristics, if
I recall.  It was abandoned as an "innovation" about as fast as *somebody's*
"Split Rudder "airbrake"....
 
Man, we are O-L-D...

Bob Pastorello
NSRCA 199  AMA 46373
rcaerobob at cox.net <mailto:rcaerobob at cox.net> 
www.rcaerobats.net <http://www.rcaerobats.net/> 
 
 

----- Original Message ----- 
From: Adam  <mailto:adam.g at sasktel.net> Glatt 
To: discussion at nsrca.org <mailto:discussion at nsrca.org>  
Sent: Friday, December 31, 2004 4:54 PM
Subject: Next revolution in pattern planes?

 

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