The streamers on the Prandtl-D No. 2 as it is launched illustrate how aerodynamic forces are maximized as birds overlap wingtips when flying in formation.
Photographer Tom Tschida
Date August 8, 2014
The streamers on the Prandtl-D No. 2 as it is launched illustrate how aerodynamic forces are maximized as birds overlap wingtips when flying in formation.