We started testing on the boats, but quickly realized we couldn’t control the wind speed, direction, or geometry. So we built a replica plywood cabin trunk to which we could fitted hatches, cowls, dorade boxes, and low profile ventilators in a variety of locations.
We drilled ventilation holes in the top of our model cabin top. An anemometer measured wind speed.
We created an improvised wind tunnel by arranging a stack of five box fans 20 feet away to create a reasonably even wind field. Wind-speed readings taken with an anemometer at various points around the replica cabin confirmed that airflow patterns matched those predicted by theory. Relative pressure was judged by flow through a plain hole at these locations.
