The Engineering Club. 17 January 2020. LCA parent Jessica Houston challenges willing students to find the efficient way to operate a wind turbine, in this case, a windmill. The turbine’s rotation winds a string on a narrow shaft in order to lift a weight, here, a pair of scissors. A question is, How does the direction of air flow provided by a hair dryer affect the performance as measured by the time to pull the scissors to the top. You may ask yourself, why use a narrow rod around which to wrap the string? LCA teacher and club originator Elizabeth Brasher is ready to join in shortly.