The Walrus HULA was a proposed Hybrid Ultra Large Aircraft. The goal was 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 would be a heavier-than-air vehicle and would generate lift through a combination of aerodynamics, thrust vectoring, and gas buoyancy generation and management. The project was cancelled in 2010.
DARPA said advances in envelope and hull materials, buoyancy and lift control, drag reduction and propulsion combined to make this concept feasible. Technologies to be investigated in the initial study phase included vacuum/air buoyancy compensator tanks, which provide buoyancy control without ballast, and electrostatic atmospheric ion propulsion.
The WALRUS could potentially expand and speed the strategic airlift capability of the United States substantially while simultaneously reducing costs. However, while such a project has not been seriously attempted before, costs are still uncertain. A smaller scale demonstration was scheduled for 2008, when a small scale version of the WALRUS designed to carry only the capacity of a C-130 Hercules (i.e., 18,000 kg or about 40,000 lbs) was expected to fly.
Famous quotes containing the word walrus:
““The time has come,” the Walrus said,
“To talk of many things:
Of shoes—and ships—and sealing wax—
Of cabbages—and kings—
And why the sea is boiling hot—
And whether pigs have wings.””
—Lewis Carroll [Charles Lutwidge Dodgson] (1832–1898)