- Component master list legend for drawing.
- Component master list for theory of operation.
- Woodward's 150 year service anniversary in the year 2020.
- Schematic diagram of a vintage Woodward jet engine governor.
- Left side of schematic diagram of a Woodward jet engine governor.
- Middle section of schematic drawing of model number 404571 series governor.
- Right side of schematic drawing of the 404571 series control.
- Woodward Gas Turbine Governor History.
- Woodward Gas Turbine Governor History.
- At the Heart of the System since 1870
- Woodward Gas Turbine Governor History.
- The newest vintage Woodward governor for the year 2020.
- Brad compairing the real thing with the patent drawing.
- 150 years of "At the Heart of the System" Woodward controls.
- How does a jet engine governor work?