- Aeronautics (4)
- Periodicals (2)
- World War, 1939-1945 (2)
- Aeronautics, Commercial (1)
- Airplanes (1)
- Breguet 14 (Military aircraft) (1)
- Helicopters (1)
- Kellet XO-60 Autogiro (1)
- Kellet XO-61 Autogiro (1)
- Military intelligence (1)
- Military records (1)
- Nieuport (France) 28 (1)
- Nurses (1)
- Sikorsky (USA) CH-53A Sea Stallion (1)
- Sikorsky (USA) R-4 (H-4) Family (1)
- Sikorsky (USA) R-6 (H-6) Family (1)
- Sikorsky (USA) VS-300 Family (1)
- Sikorsky (USA) XR-4 (1)
- Sikorsky (USA) XR-5 (1)
- Sikorsky (USA) XR-6 (1)
- Sikorsky (USA) XR-6A (1)
- Vietnam War, 1961-1975 (1)
- Women in aeronautics (1)
- World War, 1914-1918 (1)
- Wright Cyclone 18 (R-3350) 18-cyl radial engine family (1)
- de Havilland (Airco) D.H.4 (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.