I have been building 1 meter wingspan 100g class free flight mono wing gliders with a chord of around 10 cm and a flying speed of approximately 3 meters per second. So far glide ratios of around 10:1 have been achieved. The wing thickness is 1.2 centimeters. The airfoil has maximum thickness at 3.5 cm from leading edge. The bottom is flat, but only covered 6 cm from leading edge, leaving an undercambered area the remaining 4 cm to the trailing edge (this design grew out of thin undercambered wings).
So, is there a maximum aspect ratio (possibly based on Reynolds number calculations and/or "pressure leakage" due to the small scale or low speed)? Or do we continue to go for as high an aspect ratio as structurally possible.
Reynolds number for airfoils = Vc/v where V = 3 m/s, chord = 0.1 meter, kinematic viscosity at sea level = 1.460 × 10 minus 5th power = 20,548 for my model.
A response by Peter Kampf June 22, 2018 to "Is it best to use a thick airfoil or an undercambered airfoil for for slow speed flight" mentioned the Daedelus airfoils DAE 11, DAE 21, DAE 31, so it seems to be on the right track.
I am getting ready to start a build, would there be an optimal aspect ratio for this new aircraft?