High Quality Content by WIKIPEDIA articles! The Walrus HULA is a proposed Hybrid Ultra Large Aircraft. The goal is to create an airship capable of traveling up to 12,000 nautical miles (about 22,000 km) in range, while carrying 500-1000 tons of cargo. In distinct contrast to earlier generation airships, the Walrus HULA will be a heavier-than-air vehicle and will generate lift through a combination of aerodynamics, thrust vectoring, and gas buoyancy generation and management. As of April 2006, the project is in danger of termination. The 2007 Budget request from DARPA calls for the termination of work on WALRUS after completion of the current Phase I contracts.DARPA says that advances in envelope and hull materials, buoyancy and lift control, drag reduction and propulsion have combined to make this concept feasible. Technologies to be investigated in the initial study phase include vacuum/air buoyancy compensator tanks, which provide buoyancy control without ballast, and electrostatic atmospheric ion propulsion.

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