Collection Item Summary:
"DH-4 Airplane, Sand Test, Wing Thrust reversed. PLATE 4 View taken during loading." View of a sand test being performed on a DH-4 at McCook Field, circa 1918-1919. Men stop to pose for the photograph.
Collection Item Long Description:
- Airplanes, Military--Flight testing
- Aeronautics, Military
- Aeronautics, Military--Research