| 摘要 |
1294844 Aircraft fuel supply systems MESSERSCHMITT-BOLKOW-BLOHM GmbH 29 July 1970 [7 Aug 1969] 36635/70 Heading B7W [Also in Division A5] A fuel system in a multi-engined aircraft, comprises main fuel supply tanks 3, 4 each divided by partitions 7 having valves 5, 6, 6<SP>1</SP> into compartments 8, 8<SP>1</SP>, 8<SP>11</SP> or 9, 9<SP>1</SP> respectively having fuel pump 10 feeding a fuel line 11 connecting one tank 3 or 4 with one of the engines 1 or 2 respectively, the fuel lines 11 being so interconnected that fuel supply to all engines is maintained following failure of one tank. The fuel lines are interconnected by a valve which opens if there is a pressure drop in one of the lines which can in turn be supplied by only one of the pumps. If all pumps in one tank fail, fuel contained in the affected tank can flow to the other through a tank connecting valve 13. Each pump 10 is housed within a main tank in an inverted-flight fuel tank 19 provided with a negative-g flap valve, and the main tanks may be made of self-sealing materials and may be fitted with explosion suppressing foam. Fire resistance walls 14 separate the fuel system from the engines and the fuel system may be provided with a venting system comprising vent lines 16 from the main fuel tanks 3, 4 and a vent line 16<SP>1</SP> from a fuel tank which may be provided in a fin 15. The vent lines terminate in a vent collector 18 and lead to atmosphere remote from the engines through a vent line 17. To prevent fuel entering the vent lines 16, 16<SP>1</SP> they are each provided with a valve and small amounts of fuel which do enter the vent lines are returned by a line 20. A fuel jettison system 21 is also provided, which includes a main valve 22 and valve 23 through which either or both main tanks can be emptied. |
