fuelTankVolumeType

Three volumes of the same tank, each smaller than the one before it. optimalVolume is the volume the shape encloses, with no allowance for anything inside it. The real volume is what is left once structure and systems have taken their share, and the usable volume is the part of that which can be fed to the engines in flight; fuel below the pump inlets, or trapped in a corner, is not usable.

The two smaller volumes are given either as volumes or as factors, never mixed. As factors they form a chain: the real volume is realVolumeFactor times the optimal volume, and the usable volume is useableVolumeFactor times the real volume. Both factors therefore lie between 0 and 1.

The excerpt is the pressure vessel of the example tank, whose shape encloses 25.6 m³; of that, 97 % is really available and 95 % of the remainder can be used.

<volume>
    <optimalVolume>25.640</optimalVolume>
    <useableVolumeFactor>0.95</useableVolumeFactor>
    <realVolumeFactor>0.97</realVolumeFactor>
</volume>

Volumes given as factors

Attributes

Name	Type	Use	Description
`@externalDataDirectory`	`xsd:string`	optional	Directory of the external data file
`@externalDataNodePath`	`xsd:string`	optional	Path of the node inside the external data file
`@externalFileName`	`xsd:string`	optional	Name of the external data file

Child elements

Name	Type	OccurrenceHow often the element may appear at this place. The schema writes it as minOccurs and maxOccurs on the declaration.	Description
sequenceThe children below must appear in exactly this order. Each may repeat as often as its own occurrence allows.
`optimalVolume`	`doubleBaseType`	[1..1] required	Volume enclosed by the shape, with material thicknesses (ribs, spars, skins, stringers) and systems (fuel pumps, pipes) neglected [m^3]
choiceExactly one of the alternatives below may appear, unless the occurrence next to this line says otherwise.
sequenceThe children below must appear in exactly this order. Each may repeat as often as its own occurrence allows.
`usableVolume`	`doubleBaseType`	[0..1] optional	Volume of fuel that can be used in flight [m^3]
`realVolume`	`doubleBaseType`	[0..1] optional	Volume that is really available inside the tank [m^3]
sequenceThe children below must appear in exactly this order. Each may repeat as often as its own occurrence allows.
`useableVolumeFactor`	`doubleBaseType`	[0..1] optional	Ratio of the usable volume to the real volume [-]
`realVolumeFactor`	`doubleBaseType`	[0..1] optional	Ratio of the real volume to the volume enclosed by the shape [-]

Type	Name
`fuselageFuelTankType`	`volume`
`vesselType`	`volume`
`wingFuelTankType`	`volume`

fuelTankVolumeType

Attributes

Child elements

Used by

In a dataset · 6 paths

In the schema · 3 declarations