H-1 Engine

The H-1 engine (an H-1D, or outboard, engine) displayed by the Udvar-Hazy Center is probably the most complete single-engine display that I've seen: Its hydraulic system is essentially complete, with the main and auxiliary hydraulic pumps, the hydraulic system accumulator reservoir, and gimbal servoactuator assemblies. Its gas generator system has a solid-propellant gas generator (SPGG), and its fuel additive blender unit (FABU) has a laced-up heater assembly.

This engine is Smithsonian catalog #A19680012000.