December 9, 20187 yr Why can't we do it between flaps 1 and 5 but everything else is fine? Does the leading edge somehow affect fuel dumping? -Angelo Busato Angelo Busato
December 9, 20187 yr I believe its because of the possibility of fuel coming in contact with the wings trailing edge and in general during fuel dumping no fuel is allowed to come in contact with any part of the aircraft.
December 9, 20187 yr 33 minutes ago, YMMB said: I believe its because of the possibility of fuel coming in contact with the wings trailing edge and in general during fuel dumping no fuel is allowed to come in contact with any part of the aircraft. You are correct about the risk of fuel contacting the wing trailing edge, although the risk of this happening is greatest when the Leading Edge Flaps are in transit, so strictly speaking you must not extend or retract the flaps between 1 and 5 during fuel jettison. Provided they are not being moved from Flaps1 or Flaps5 then the risk of this happening during fuel jettison is minimal. Edited December 9, 20187 yr by berts additional information Bertie Goddard
December 9, 20187 yr Author 11 hours ago, berts said: You are correct about the risk of fuel contacting the wing trailing edge, although the risk of this happening is greatest when the Leading Edge Flaps are in transit, so strictly speaking you must not extend or retract the flaps between 1 and 5 during fuel jettison. Provided they are not being moved from Flaps1 or Flaps5 then the risk of this happening during fuel jettison is minimal. So how can fuel that's jettisoned at the trailing edge, come into contact with the leading edge? -Angelo Busato Angelo Busato
December 9, 20187 yr 1 hour ago, killairbus said: So how can fuel that's jettisoned at the trailing edge, come into contact with the leading edge? -Angelo Busato It is not so much that the fuel will come in contact with the leading edge, but that the slats at the leading will change the airflow which will allow the fuel coming out to contact the trailing edge. Hope that makes sense. Nick Hatchel "Sometimes, flying feels too godlike to be attained by man. Sometimes, the world from above seems too beautiful, too wonderful, too distant for human eyes to see …" Charles A. Lindbergh, 1953 System: Custom Watercooled--Intel i7-8700k OC: 5.0 Ghz--Gigabyte Z370 Gaming 7--EVGA GTX 1080ti Founders Edition--16GB TridentZ RGB DDR4--240GB SSD--460GB SSD--1TB WD Blue HDD--Windows 10--55" Sony XBR55900E TV--GoFlight VantEdge Yoke--MFG Crosswind Pedals--FSXThrottle Quattro Throttle Quadrant--Thrustmaster Warthog HOTAS--TrackIR 5--VRInsight MCPii Boeing
December 9, 20187 yr Berts is correct. To further clarify it’s the outer LE devices that cause this as they are located in front of the jettison nozzles. That’s why its transiting flaps 1-5 that causes the issue, as that is the only LE flap group that moves between those settings. Edited December 9, 20187 yr by Jetlinker Jeffery Williams
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