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- Design history of Herringbone Gears.
- What does a herringbone gear look like?
- History of Woodward herringbone gear type XX oil pump.
- Arrow shows the herringbone gears.
- Woodward schematic drawing history saved.
- Design history of herringbone gears.
- Design history of herringbone gears.
- Design history of Woodward herringbone gears oil pumps.
- The Woodward Company manufactured hundreds of these pumps over the decades.
- Vintage governor oil pump gears for the history books.
- Oil pump herringbone gears manufactured by the Woodward Governor Company.
- Massive harringbone gears added to the governor collection.
- These massive governor oil pump gears were scapped because of small cracks found from NDT testing after over 50 years of operation.
- Vintage machie shop manufacturing history saved.
- Some of Woodward's largest oil pump gears manufactured for hydraulic governor control systems.