A Wind-Tunnel Study of Gliding Flight in the Pigeon Columba Livia

摘要: 1. A technique for training pigeons to fly in a tilting wind tunnel is described, and method of determining lift drag gliding flight explained. 2. Drag measurements were made on wingless bodies preserved feet supplementary experiments. The results used analyse the measured total live into ( ) body drag, b foot c induced d wing profile drag. 3. As speed increased, drastically reduce their span, area aspect ratio. increased resulting from this more than offset by very large reduction 4. Although lift: ratio at best 5.5-6.0, changes shape keep it near its maximum, up speeds least twice minimum speed.