- A vintage Elmer Woodward governor control mechanism in Irl Martin's office.
- A Woodward worker testing hundreds of propeller governors in the 1950's.
- GOVERNOR CONTROL MECHANISM PATENT NUMBER 2,527,867.
- GOVERNOR CONTROL MECHANISM PATENT NUMBER 2,527,867.
- GOVERNOR CONTROL MECHANISM PATENT NUMBER 2,527,867.
- GOVERNOR CONTROL MECHANISM PATENT NUMBER 2,527,867.
- GOVERNOR CONTROL MECHANISM PATENT NUMBER 2,527,867.
- GOVERNOR CONTROL MECHANISM PATENT NUMBER 2,527,867.
- GOVERNOR CONTROL MECHANISM PATENT NUMBER 2,527,867.
- GOVERNOR CONTROL MECHANISM PATENT NUMBER 2,527,867.
- GOVERNOR CONTROL MECHANISM PATENT NUMBER 2,527,867.
- GOVERNOR CONTROL MECHANISM PATENT NUMBER 2,527,867.
- GOVERNOR CONTROL MECHANISM PATENT NUMBER 2,527,867.
- GOVERNOR CONTROL MECHANISM PATENT NUMBER 2,527,867.
- GOVERNOR CONTROL MECHANISM PATENT NUMBER 2,527,867.