Object Collection: Propulsion
- GE J31 Turbojet Engine, Cutaway, Motorized
- General Electric CF6-6 Turbofan Engine, Cutaway
- General Electric J79-GE-2 Turbojet Engine
- General Electric J85-GE-17A Turbojet Engine, Cutaway
- General Electric T31 (TG-100) Turboprop Engine, Cutaway
- Gnome Omega No. 1 Rotary Engine
- Hall-Scott A-1 In-line Engine
- Hamilton Standard Propeller, controllable-pitch, two-blade, metal, Ruth Nichols
- Heath-Henderson B-4 In-line Engine
- Heinkel (von Ohain) HeS 3B Turbojet Engine, Reproduction
- Hendee Indian Rotary 7 Engine
- Hispano-Suiza Model 8 Ca, V-8 Engine
- Horizontally-opposed 6, Lycoming AEIO-540-D4A5 Engine
- Humber Ltd. (Bentley) B. R. 2, Rotary 9 Engine
- In-line 3, Elbridge Featherweight
- In-line 4, Curtiss Model K