- Aeronautics (6)
- Kites (3)
- Aeronautics, Military (2)
- Aeronautics, Commercial (1)
- Airplanes (1)
- Buffalo (Airship) (1)
- Civil War, 1861-1865 (1)
- Ganymede (Airship) (1)
- Gliding and soaring (1)
- Great Western (Airship) (1)
- Langley Aerodrome No 5 (1895-96) (1)
- Madame Carlotta (Airship) (1)
- Periodicals (1)
- Phantom Balloons (Airships) (1)
- Research aircraft (1)
- Russo-Japanese War, 1904-1905 (1)
- South African War, 1899-1902 (1)
- Spanish-American War, 1898 (1)
- The Aerial (Airship) (1)
- U.S. Signal Corps SC-1 free balloon (1)
- Works of art (1)
- World War, 1914-1918 (1)
Our collections specialists actively work on the conservation, preservation, restoration, and long-term care of the objects in our collection. From full-scale restoration projects to applying preservation techniques and doing regular assessments, these activities form a crucial part of our stewardship of the National Collection.