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air foil and leading edge ...new wing

Kenai pilot

Registered User
hey still building and living Alaska .
A new cub with experimental wing in the offing... wondering if any one has good input on technical variances on air foil type and slots...meaning specifically, facts on performance for cub weight and stol coeficients??
thanks if you do!!
p.s I have done fairly exaustive reseach since my last build... just looking for new friends that have insight...
 
Slats with their accompanied slots appears to be a big item these days. Most seem to just hang the slats off the existing leading edge. This method creates drag resulting in a cruise speed penalty. In my opinion, which I believe Steve Pierce will confirm as he has done testing, is that the slot which is in the leading edge being produced by Dakota Cub would be the better choice. https://dakotacub.com This involves a different shaped leading edge to the ribs. The Piper L-14 had leading edge slats. Here is a discussion: https://www.supercub.org/forum/threads/piper-l-14.24210/

Leading edge slats work best when you also have extended length trailing edge flaps. This could just be longer Piper flaps or the double slotted Keller flaps. The long Piper flaps would have less weight.
 
Slats with their accompanied slots appears to be a big item these days. Most seem to just hang the slats off the existing leading edge. This method creates drag resulting in a cruise speed penalty. In my opinion, which I believe Steve Pierce will confirm as he has done testing, is that the slot which is in the leading edge being produced by Dakota Cub would be the better choice. https://dakotacub.com This involves a different shaped leading edge to the ribs. The Piper L-14 had leading edge slats. Here is a discussion: https://www.supercub.org/forum/threads/piper-l-14.24210/

Leading edge slats work best when you also have extended length trailing edge flaps. This could just be longer Piper flaps or the double slotted Keller flaps. The long Piper flaps would have less weigthanks...just the kind of input I need. I have plans for the stol king leading edge as well as the ragwing stork.... I will look into what your suggesting a little harder. thanks
 
While we are on the subject of the leading edge……

Does anyone have more pireps on the experimental badlands STOL wing cuff? Vetterman seems to like it, but I haven’t heard anyone else’s experience/opinion.

Thanks!
 
While we are on the subject of the leading edge……

Does anyone have more pireps on the experimental badlands STOL wing cuff? Vetterman seems to like it, but I haven’t heard anyone else’s experience/opinion.

Thanks!
Look at the STCs SA631AL, SA634AL, SA658AL, SA659AL SA490AL, SA493AL, SA520AL, SA531AL & SA542AL. There were extremely popular 30+ years ago on a wide variety of airplanes. http://crosswindsstol.com/2020/stcs/
 
I didn’t mean to high jack the thread. I’m curious to know more about slats and slots as well.

I’ve read all the old threads regarding the STC PA18 wing cuff. Sounds like they need vg’s to unlock the real benefit and there is a weight penalty.

I was curious to know if the experimental badlands kit is any different. I’ll start a new thread.

Thanks everyone!
 
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