Airflow calibration

A cluster of dry sycamore seed pods had drifted onto the balcony stone, their fibrous wings caught in the corner joint. I approached with measured strides and selected a single winged seed from the stone. Stepping forward to the edge of the exterior rail, I elevated it between my right gauntlet fingers and tested the rising morning thermal against my forearm. After determining the horizontal vector of the updraft, I released the pod into the slipstream. It entered a steady, continuous auto-rotation, descending in a clean spiral toward the courtyard tiles below.