u/Silent_Job_9471

Im currently a High school student working on a final long essay and i’m wanting to do some calculations with a wind tunnel. Im wondering what the best ways to go about making a large one and what i can do to get the most accurate measurements. The question I’m revolving around is “How does wing aspect ratio affect the lift to drag ratio of a model airfoil/plane at low Reynolds Numbers?”. Im really just looking for ways to measure the lift to drag ratio and a way to confirm how turbulent and fast the air is moving. Thank you for any ideas.