- Air mail service (1)
- Bach 3CT8 (Air Yacht) (1)
- Boeing-Vertol CH-113 Voyageur (1)
- Brunner Winkle Bird (1)
- Curtiss Condor Family (1)
- Curtiss JN-4 Jenny (1)
- Fokker D.III (M 19F, M 19K) (1)
- Great Lakes 4A-1 (1)
- LWF H Owl (1)
- Martin MP Mailplane (1)
- Piasecki H-21 (1)
- R 34 (British Rigid Airship) (1)
- Sikorsky (USA) S-38 Amphibion Family (1)
- Travel Air 2000 (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.