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

[Chad Northeast]

I have built and flown one....I also spoke directly to CPLR about its 
function.  Its primary function is to improve rudder effectiveness by 
cleaning up the slipstream around the fuse, secondly it helps to reduce 
the amount of pitch to the belly during level flight rudder application, 
so improving things like rolling circles.  Does it work?  Its very 
subtle...but you can tell some differences....is it better?  I dont 
know, but every time I took it off my Enigma I didnt like the way the 
plane flew afterwards.  It did certainly remove my pitch mixing in knife 
edge (5% both ways).....and I think it did help with rollers.  It also 
forced a thrust line change for vertical climbs.

Anyways, its a 200mm span, 100mm at the root, 60mm at the tip, straight 
TE, naca 0010 profile, and set 0.5 deg negative relative to the stab.  
The LE of the small wing sits slightly ahead of the TE of the big wing 
if I remember right.

Dead simple to make (takes 1 evening)....try it out, toss it if you hate 
it, keep it if you dont :)

Chad

Jim Stovall wrote:

> 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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