Although not really a surprise, but still representing a small satisfaction, the 50/50 polar is positioned well between the polars of SB and TP. Once I’d drawn this « 50/50 » profile, I analyzed its polars using Xfoil in PredimRC. The first step analyze create an airfoil profile halfway between the profiles of SB96V and TP42. I still am not! But I learned some things … Not totally satisfied with the inverted flight of SB96V/Vs, but a little frustrated in gliding with TP42/29, I tried to find a compromise … So I started a few months ago to see if I could find by calculation these differences with PredimRC by Franck Aguerre, and in this I was successful, taking into account the flap angles. In mountain thermal flight, I really feel these differences at the sticks. In short: SB glides better, while TP is better for inverted flight. I appreciated the differences between these 2 combinations, both piloted in 4 axes technique. The majority of aerobatic gliders I flew were designed either TP42/TP29 (symmetrical, Thierry Platon) or SB96V/Vs (asymmetrical, Serge Barth). dat files with coordinates of these airfoils here: Thanks to Steve Lange for help with English version □ CoordinatesĢ. La version française de cet article est ici. With some explanations, it’s also an invitation to experiment and share your own airfoil creations! As the article will show, the idea is to cross aerodynamic analysis with flight impressions to produce an airfoil adapted to the type of flying I’m hoping to achieve. It is a great pleasure for me to propose here, in collaboration with François, the coordinates of a pair of airfoils dedicated to aerobatic gliders: SC17 and SC17s.
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