I assumed that the fastest times would belong to the stance that was both low, and had my hands in front of my face. I designed an experiment in which I took around seven runs per stance, and recorded the time at four points on the set distance. I created a cubic function from my data, and used derivatives to find the instantaneous velocity and acceleration. I attempted to test stances in a wind tunnel that I had built, but it did not work.
My data showed that the low tuck with my hands in front of my face had the highest acceleration and velocity.
In conclusion, the type of tuck a ski racer assumes can greatly affect their speed, and thus their results. The most effective tuck is low, with the hands positioned in front of the skier's face.
This project investigated the aerodynamic properties of different tuck positions.
Science Fair Project done By Rachel C. Leuthold