Buoyancy
Latest
'Miraculous' Aeros airship set to fly by 2013, thanks to DOD funding
Are you nostalgic for a time when the word "zeppelin" stood for leisurely intercontinental travel for the rich and famous, rather than bass-heavy portable sound and MotoBlur phones? Take heart, as Ukrainian entrepreneur Igor Pasternak claims to have solved the "buoyancy problem" that has long limited the usefulness of airships. The problem is that burning fuel or dropping cargo lightens the ship, which then needs to vent costly helium to return to earth; without a way to control buoyancy, take-offs and landings become complicated to the point of uselessness. Pasternak claims to have solved this sticking point by compressing the pricey gas, thereby conserving it for later use. The Defense Department (which loves its warblimps) has contracted his company, Aeros, to provide a working demonstration by 2012-13. Dubbed Pelican, it will only fly without a payload at first -- but if the technology proves feasible, we might just see a new Era of Airships.
China's super buoyant, super small copper boats
Researchers in China, inspired by Mother Nature, have developed postage stamp-sized copper mesh boats, "some of the most buoyant" yet devised. Taking a page from both the shark and the lotus, the team applied a rough and uneven coating to the surface of the mesh, which reduces the vessel's contact with water. Next, a hydrophobic was applied, which keeps water from penetrating the porous material, "even when they are carrying a load," according to Dr Qinmin Pan, a chemist from Harbin Institute of Technology. "We believe these boats are some of the strongest ever built - in terms of the mass they can carry." Possible uses for the superhydrophobic material include microfluidic devices (where minuscule amounts of a liquid are used to carry information on a chip) and miniature aquatic robots. As you know, ensuring replicant diversity is an important part of their plan.
