| 摘要 |
A fixed wing aircraft has at least one fuel tank 14 in the wing 10 and an associated surge tank 16 located outboard of the main tank. A fuel tank inerting system comprises a source 20 of inerting fluid and a flow passage 22 for supplying the inerting fluid to the tank. The passage 22 passes on an outward limb through inner 121 and outer 122 compartments of the main tank then into the surge tank before returning into the main tank. The return limb of the duct has a number of outlets 24 for discharging inerting fluid into the ullage of the main tank. A pressure relief valve 26 is disposed in a portion of the duct which passes through the surge tank. When a predetermined back pressure results in the duct the relief pressure valve will open and excess pressure can then be vented overboard through output vent 18. |
