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A16 - Design Considerations for Water Ballast Systems in Airships

 

Airship transport must consider means of ballast compensation
due to excess buoyancy. This compensation is necessary when
freight mass in transport airships is less than the available lift or
when there is no freight at all on a return flight. The load exchange
procedure that will be used for the CargoLifter CL 160 makes
extensive use of water ballast. The paper provides a survey of the
advantages and disadvantages of water as means of ballast.
Furthermore it will outline solutions to overcome some
disadvantages, how such a system can be designed and some
practical experience already gained with the water ballast system
installed on the CL 75 AirCrane. This is especially important, as
water ballast systems are not commonly used in the aviation
industry, resulting in less design experience compared to other
systems.

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