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Grumman F-14 Tomcat: Difference between revisions
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The F-14 has two separate hydraulic systems; identified as the '''Flight System''' and the '''Combined System'''. The flight system powers the primary flight controls and surfaces, and the combined powers everything else. | The F-14 has two separate hydraulic systems; identified as the '''Flight System''' and the '''Combined System'''. The flight system powers the primary flight controls and surfaces, and the combined powers everything else. | ||
Both hydraulic systems are powered by engine driven pumps. There are two backup systems for the hydraulics in case of an engine (primary) pump malfunction. The first of these is a Bi-Directional transfer pump that can | Both hydraulic systems are powered by engine driven pumps. There are two backup systems for the hydraulics in case of an engine (primary) pump malfunction. The first of these is a Bi-Directional transfer pump that can powere one system from the other system. The second method is an electrically powered pump. The electrically powered pump has its own small reservoir - so once powered on the electrically powered pump should not be powered off as the hydraulic fuel expands and is lost - so there may not be enough fluid remaining in the reservoir to allow the pump to start. | ||
When there is insufficient hydraulic power the powered items will no longer function; so in the | When there is insufficient hydraulic power the powered items will no longer function; so in the event of a dual engine flameout the flight controls will be inoperable. | ||
Sufficient hydraulic pressure for smooth flight control inputs should be available with one engine windmilling at 18% rpm or two engines at windmilling at 11% rpm. | Sufficient hydraulic pressure for smooth flight control inputs should be available with one engine windmilling at 18% rpm or two engines at windmilling at 11% rpm. | ||