I did an experiment of 8 different square wing areas. And found out that as the wing area increases, the wing vibrates more. (I made the wings out of hard paper) Does this mean that this is due to the turbulence created by wingtip vortices, or the increased form drag that produced turbulent air? Are there any equations that describes mathematical relationship between the area and drag? I did the experiment by using an extremely sensitive scale and attached to the wings. The areas are: 50 cm^2, 60...til 120. The airspeed is the same for all. As the wing area increases, the mass change range increases on the scale too, because the vibration is more severe.
My investigation is to establish a relationship between the wing area and the lift force. Does the drag affect the lift force? Also, I think as the area doubles, the form drag increases by a factor of 4. Is this correct/