- Aeronautics (3)
- Aeronautics, Commercial (2)
- Airplanes (2)
- Aeronautics, Military (1)
- Airplanes, Home-built (1)
- Helicopters (1)
- Helicopters, Home-built (1)
- Rotorway RW 133 Scorpion Helicopter (1)
- Rutan Model 33 Vari-Eze (1)
- World War, 1939-1945 (1)
- Wright Cyclone 18 (R-3350) 18-cyl radial engine family (1)