A new type of extinguisher that uses sound waves to put out fires has been built by two engineering students in the US. Both chemical- and water-free, the invention offers a relatively non-destructive method of fire control, which could find applications in fighting small fires in the home, and the researchers now hold a preliminary patent application for their device.
While the concept of using sound waves to extinguish flames is not new, previous attempts to realize the principle – including efforts by teams at West Georgia University and the US Defense Advanced Research Projects Agency (DARPA) – had not been successful.
Undeterred by this, as well as initial [...]
With Swiss pilot André Borschberg at the controls, the solar-powered, single-pilot Solar Impulse 2 airplane took off from Nanjing Lukou Airport in China today bound for Hawaii on the longest leg of its round-the-world flight.
This isn’t just a major leg of the Solar Impulse 2 solar-powered circumnavigation, it is also an attempt at the longest duration flight ever by a solo pilot in any type of aircraft. Confined to his cockpit not much larger than a first class airline seat, Borschberg will be in the air for 130 hours, or about five nights, as he flies 8,172 km (5,078 mi) on his way to the Hawaiian Islands. During this time, he will be in constant contact with [...]