[NSRCA-discussion] Paysant-Le Roux's Oxalyis using a winglet aft of canop...

[Rcmaster199 at aol.com]

Don Lowe discusses a little bit about such devices in the latest MA. One of 
the photos also shows one of his pattern models retrofitted with the device and 
I think he stated that in his set-up it wasn't terribly effective. The amount 
of vertical and horizontal area the little "T tail" adds may be too small for 
a 2 m pattern model, CPLR notwithstanding. 

The concept is a good one tho, and the idea has been around since at least 
the Wright Bros, although they may not have used the wing intreplanes with that 
specific purpose in mind. To my knowledge, Nat Penton originally applied the 
idea on a model more than 20 years ago. I wrote about that and even played with 
it in my own models a bit. Back then, the schedules we flew were not that 
demanding and couldn't really take advantage of the concept, but the schedules we 
fly now certainly will be easier to fly with such appendages on the models.

Now the horizontal surface angled at the correct incidence could possibly be 
enough to counteract the notorious pitch to landing gear that CPLR designs are 
infamous for with top rudder application. On the other hand, CPLR is gifted 
enough pilot to overcome the model deficiency on his own, but hey, if he 
believes it helps, then it does help him and hurts everyone else flying against him.

MattK

In a message dated 5/24/2006 10:44:24 PM Eastern Standard Time, 
falcondoc at sbcglobal.net writes:
Sorry if this has already been discussed but,

I was reading the latest issue of  Model Aviation this evening and saw a 
picture of Christophe PAysant-LeRoux's Oxyalis with a "winglet" mounted aft of of 
the canopy. What is the function of this winglet? Has anyone on this list used 
this? Thanks..........
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