Durafly Tundra Wing Vortex Generator

thingiverse

Human: Custom Vortex Generators for the Durafly Tundra. Hobby King's Grand Tundra model features vortex generators on top of the wing, so I created these custom vortex generators for my regular Durafly Tundra. Researching Vortex Generators revealed several publications that stated the vortex should be between 12-15 degrees offset from airflow. Not one publication had a solid formula for designing vortex generators. I decided to use 12 degrees to minimize drag. The height of 4mm for the VG was determined by measuring 1% of the wing chord (200mm x 1%=2mm). I added 2mm to that amount so the VG would intersect with the boundary layer. The length of the VG was calculated by multiplying its height by 3.8: Length = Height x 3.8 (4mm x 3.8=15.2mm). Distance from Leading Edge: Several publications suggest installing vortex generators 7-16% from the leading edge. Distance between Vortex Generators: One publication stated that distance equals 10 times the VG height: D = 10 x 4mm, which equals 40mm. I'm not sure about the accuracy of this publication. Number of installations: Some publications recommend installing vortex generators from end to end, while others suggest installing only on the outer half of the wing to prevent tip stalls. It's up to you how many to install; please share your results in the comments. To ensure a strong bond, sand the bottom of each vortex generator with 100-grit sandpaper and clean the mating surfaces with isopropyl alcohol before applying E6000 glue and clamping them in place overnight. VG Design References: https://www.sciencedirect.com/science/article/pii/S0997754615001181 https://www.diva-portal.org/smash/get/diva2:10933/FULLTEXT01.pdf http://www.vortex-generators.com/installation-of-vortex-generators.html http://iopscience.iop.org/article/10.1088/1742-6596/524/1/012019/pdf https://www.flitetest.com/articles/vortex-generator-design-tips-and-experimentation