Helicopter pad for trains
作者： Edwin deS. Snead
DOI:
关键词: Flat surface 、 Conveyor system 、 Structural engineering 、 Acoustics 、 Unit train 、 Lift (force) 、 Train 、 Engineering
摘要: The helicopter pad for use on trains comprising a flat surface having an area suitable the receipt of skids, plurality structural members connected to and frame railroad car, ladder extending from car. serves provide access surface. has strength supporting weight helicopter. is high friction material. car transfer unit train underlying conveyor system. positioned above lift portion system An extensible this increases This selectively actuable. free protrusions thereabove.
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