ORIGINAL: UStik
Thanks for reply. Yes, good old GIGO, but the tool I'm using is made by a professional. Though I may use it unaware I trust in it being better than me. It helps me getting aware of new aspects.
In this case, I was after only one point, the side force (tucking) the fuse might produce in knife-edge. I mentioned the cheeks because they enlarge the top-view area and thus this force, not downline drag. I think I understand that you meant the lateral flounder area producing the lift in KE.
I'm just wondering what's going on. Meseems with this thread and looking at the Z-50 I chanced upon a trick, namely positive incidence of wing and stab. When I tried, the model turned out to be still (nearly) neutral upright and inverted (as trimmed before), but now neutral in KE as well - to my big surprise. So it seems to be possible; now it would be interesting to prove it and find any requirements.
The ZLIN 50 was a design I built for Dave Brown for the 1976(?) TOC. I reoriented fuselage positioning by lowering LE of both wing and stab so that in level flight they were closer (vertical seperation) - engine downthrust was also added.
I never flew the models - Dave did all the flight stuff and won 2nd as I recall.
Years later , I did a scale Zlin 50 L - which used the inline inverted engine in place of the Lycoming. also a larger tailplane was used . It was designed as a club aerobatic plane.
This setup I left "stock" as to angles and placements - I did opt for fully sym wing and setup angles all 0-0-0
It flew well but the structural requirements of the horizontal tailplane was a pain. One more thing -On ZLINS and other low wing craft- the low wing eliminates divergent flow around wing root - which is part of center wing placement designs. Makes for effectively more fuselage side area -BUT requires more dihedral
ZLIN also added huge fillets on this design as well as 256AFS models
This was done to reduce turbulance (hitting the tailplanes)as the craft made abrupt pitching maneuvers .
our rinky dink models operate in a much more forgiving environment.