- WOODWARD'S PROPELLER CONTROL SYSTEMS... At the Head of the Class.
- Patent number 2,474,140. Page 1.
- Patent number 2,474,140. Sheet 4.
- History in the making!
- Patent number 2,474,140.
- Patent number 2,474,140. Sheet 3.
- Patent number 2,474,140. Sheet 2
- Patent number 2,474,140. Page 2.
- Patent number 2,474,140. Page 4.
- Woodward... At the Heart of the System Since 1870.
- Patent number 2,474,140. Page 3.
- HYDROMATIC PROPELLER DEVELOPMENT HISTORY.
- PAGE 5.
- HYDROMATIC PROPELLER DEVELOPMENT HISTORY. PAGE 3.
- HYDROMATIC PROPELLER DEVELOPMENT HISTORY.