- Aeronautics (5)
- Periodicals (3)
- Aeronautical engineers (2)
- Aeronautics, Military (2)
- Air mail service (2)
- Aerial photography (1)
- Air pilots (1)
- Aircraft industry (1)
- Airplanes (1)
- Airports (1)
- Airships (1)
- Balloons (1)
- Curtiss CD-12 (engine) (1)
- Curtiss R-1454 (engine) (1)
- Curtiss V-1400 (engine) (1)
- Gliding and soaring (1)
- Helicopter transportation (1)
- Helicopters (1)
- Kites (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.