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trying2fly
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All my best wind fighters have KF4's



Thanx Jeff
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OldSchoolFlyer
I have attached some photos of my Soukoi with the wing modification. The KF is 7 1/2 " at the root and 2" at the tip. I didn't calculate the % of increase but the area is much larger. The results of this mod is a faster roll with small ailerons and a very slow landing speed. This wing is almost impossible to stall. I asked Dave @ RCP to include leading edge profiles because none of the plans availabe show a suggested LE profile. A sharp LE will be fast and pitch sensative (elevator control). a more rounder LE will make the plane less sensative to pitch and help with inverted flight. I used a rounded LE with a small radius on the bottom ( up to the seam ) and a deeper radius on the top of the wing. This radius also lowers the stall speed a bit. The wing length at the back of the KF in 18". This is a great fun flyer with very predictable control inputs. It has very smooth slow landing speed. IMG_20181026_074434.jpg  IMG_20181026_074508.jpg  IMG_20181026_074520.jpg  IMG_20181026_074521.jpg  IMG_20181026_074540.jpg  IMG_20181026_074626.jpg 
Old School Flyer
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homey666
Quote:
I have attached some photos of my Soukoi with the wing modification. The KF is 7 1/2 " at the root and 2" at the tip. I didn't calculate the % of increase but the area is much larger. The results of this mod is a faster roll with small ailerons and a very slow landing speed. This wing is almost impossible to stall. I asked Dave @ RCP to include leading edge profiles because none of the plans availabe show a suggested LE profile. A sharp LE will be fast and pitch sensative (elevator control). a more rounder LE will make the plane less sensative to pitch and help with inverted flight. I used a rounded LE with a small radius on the bottom ( up to the seam ) and a deeper radius on the top of the wing. This radius also lowers the stall speed a bit. The wing length at the back of the KF in 18". This is a great fun flyer with very predictable control inputs. It has very smooth slow landing speed. [ATTACH=full]56554[/ATTACH] [ATTACH=full]56555[/ATTACH] [ATTACH=full]56556[/ATTACH] [ATTACH=full]56557[/ATTACH] [ATTACH=full]56558[/ATTACH] [ATTACH=full]56559[/ATTACH]

That is one fine build! Scheme is great. Nice.

Peter
YouTube Channel

flower666able
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