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Fairchild Republic A-10 Thunderbolt II: Difference between revisions
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Fairchild Republic A-10 Thunderbolt II (view source)
Revision as of 10:39, 14 January 2009
, 14 January 2009→Fuel System
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FlightGear A-10 starts with all internal tanks full. | FlightGear A-10 starts with all internal tanks full. | ||
2 wing tanks (left and right), 2 fuselage tanks: main | 2 wing tanks (left and right), 2 fuselage tanks: left main (aft) linked to left system and right main (forward) linked to right system, up to 3 external tanks (2 wings and 1 fuselage). | ||
Normally the left wing and left main tanks feed the left engine and the APU. The right wing and right main tanks feed the right engine. The two feed lines can be interconnected by opening the cross feed valve ('''E''' switch). | Normally the left wing and left main tanks feed the left engine and the APU. The right wing and right main tanks feed the right engine. The two feed lines can be interconnected by opening the cross feed valve ('''E''' switch). | ||
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The wing boost pumps ('''G''' switch) supply the respective engines until the wing tanks are empty, then the wing boost pumps automatically shut off. The main boost pumps then supply the respective engines with the remainder fuel in main tanks. | The wing boost pumps ('''G''' switch) supply the respective engines until the wing tanks are empty, then the wing boost pumps automatically shut off. The main boost pumps then supply the respective engines with the remainder fuel in main tanks. | ||
In case of a wing tank boost pump failure, the wing tank fuel will gravity feed its respective main tank if the main tank fuel level is below 600 lbs. Check valves prevent reverse fuel flow from the main | In case of a wing tank boost pump failure, the wing tank fuel will gravity feed its respective main tank if the main tank fuel level is below 600 lbs. Check valves prevent reverse fuel flow from the main tanks to the wing tanks. | ||
In case of a main tank boost pump failure, the affected engine will suction-feed from the affected tank for all power setting up to an altitude of nearly 10,000 feet. | In case of a main tank boost pump failure, the affected engine will suction-feed from the affected tank for all power setting up to an altitude of nearly 10,000 feet. | ||
Unequal fuel level between | Unequal fuel level between left (aft) main and right (forward) main tank (imbalance superior 750 lbs) will cause a longitudinal CG shift that may exceed allowable limits. In this case, opening the valve "tank gate" create a link between the two main tanks. | ||
Fuel from the external tanks is transfered to the wing or main tanks by pressure from the bleed air system. Wing tanks can be topped when the fuel level is below 1590 lbs. | Fuel from the external tanks is transfered to the wing or main tanks by pressure from the bleed air system. Wing tanks can be topped when the fuel level is below 1590 lbs. | ||
Main tanks can be topped when the fuel level is below 3034 lbs. | Main tanks can be topped when the fuel level is below 3034 lbs. | ||
The cycling is repeated until fuel is depleted from the external wing tanks first, and | The cycling is repeated until fuel is depleted from the external wing tanks first, and external fuselage tank secondly. | ||
external fuselage tank secondly. | |||
For negative G flight, collector tanks will supply the engine with sufficient fuel for | For negative G flight, collector tanks will supply the engine with sufficient fuel for 10 seconds operation at MAX power. | ||
10 seconds operation at MAX power. | |||
The '''Fuel Control panel''' is located on the forward part of left console. 1 lever, 4 push buttons and 8 switches are functional. | The '''Fuel Control panel''' is located on the forward part of left console. 1 lever, 4 push buttons and 8 switches are functional. | ||
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[[Image:A-10-fuel-control-doc.jpg|thumb|Fuel Control panel.]] | [[Image:A-10-fuel-control-doc.jpg|thumb|Fuel Control panel.]] | ||
(<b>A</b>) Fill Disable buttons, left and right wings tanks. | (<b>A</b>) Fill Disable buttons, left and right wings tanks. Here fill disabled (button up showing red stripe). Refuel disabled for the wings tanks. | ||
(<b>B</b>) Fill Disable buttons, left and right main tanks (practically forward and aft fuselage tanks). | (<b>B</b>) Fill Disable buttons, left and right main tanks (practically forward and aft fuselage tanks). Here fill enabled (button down hidding red stripe). Refuel enabled for the main tanks. | ||
(<b>C</b>) Refuel Receiver Door lever. | (<b>C</b>) Refuel Receiver Door lever. | ||
(<b>D</b>) External Tanks switches, Wings and Fuselage. Set to OFF to | (<b>D</b>) External Tanks switches, Wings and Fuselage. Set to OFF to un-pressurize external tanks | ||
(<b>E</b>) Cross Feed switch, allow any operating boost pump to feed both engines. | (<b>E</b>) Cross Feed switch, allow any operating boost pump to feed both engines. | ||
(<b>F</b>) Tank Gate switch, open a valve linking the left and right main fuel tanks. | (<b>F</b>) Tank Gate switch, open a valve linking the left (aft) and right (forward) main fuel tanks. | ||
(<b>G</b>) . | (<b>G</b>) . | ||