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US 4,789,116 AGranted
Landing deck for aircraft
AssigneeA/S Raufoss Ammunisjonsfabrikker
InventorBard Eftestol
Life of this patent
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AssigneeA/S Raufoss Ammunisjonsfabrikker
InventorBard Eftestol
Estimating the term…
Landing deck for aircraft, in particular for helicopters, on seagoing vessels and offshore installations, such as platforms. When fuel is leaking from a helicopter after an accident, as for instance an unsuccessful landing, a fire often starts. In order to reduce the combustion intensity and the duration of such a fire continuous grooves or channels (8) are formed in beams of steel or metal, of which the deck is made, in the surface facing upwardly. Thereby fuel which has leaked out will be collected in the grooves or channels. The air supply to the grooves or channels is poorer than the air supply to fuel situated on decks without grooves or channels, and the combustion intensity, therefore, is reduced. Moreover, the combustion takes place on the surface of the liquid, and it is possible to drain a substantial part of the fuel without ignition thereof. Fuel may be collected from the grooves or channels by means of a collecting manifold or gutter.
A landing deck for aircraft which provides enhanced removal of liquids deposited thereon, said landing deck comprising a plurality of parallel drainage beams which are situated in side-by-side relationship to one another, said drainage beams being inclined along their longitudinal dimensions, each of said drainage beams including upper flanges which define a longitudinal slit therebetween and channel walls extending below said upper flanges which form a longitudinal drainage channel below said upper flanges, said longitudinal slit communicating with said longitudinal drainage channel to enable liquid located on said upper flanges to flow through said longitudinal slit and into said longitudinal drainage channel, said longitudinal slit having a narrower width than the maximum width of said longitudinal drainage channel.
Dependencies are inferred from the claim text.