Midnight In The Desert — mach speed

Bloodhound supersonic car fires up rocket engine, going for 1000 MPH?

Posted by K R on

Bloodhound supersonic car fires up rocket engine, going for 1000 MPH?

The Bloodhound supersonic car has been fired up for the first time - and worked a treat. Engineers turned over the vehicle's Eurofighter jet engine in a "tie-down" test at Cornwall's Newquay airfield on Friday. It worked flawlessly, sending a big orange flame out of the rear nozzle. The intention is for the car to begin some "slow-speed" running - about 200mph (320km/h) - at the end of next month. The team had been concerned that the Rolls-Royce EJ200 power unit might have some operational difficulties being in a car as opposed to sitting in a fighter aircraft. But when...

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Optical shock: Scientists have imaged light going faster than itself

Posted by K R on

Optical shock: Scientists have imaged light going faster than itself

A team of researchers at Washington University in St. Louis has taken images of a laser pulse generating an optical Mach cone: the equivalent of a sonic boom, but for light. To make an optical Mach cone, a pulse of light would need to be traveling faster than the waves it’s emitting can propagate forward. But the researchers were able to peel apart the properties of a laser beam, interacting separately with velocity, wavelength, and frequency. They directed the beam through a layered confection of silicone panels, aluminum oxide powder, and dry ice. The source of the light waves was...

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Lockheed Martin's hypersonic aircraft plans are taking shape

Posted by K R on

Lockheed Martin's hypersonic aircraft plans are taking shape

For years, Lockheed Martin has been working on hypersonic (Mach 5 and above) aircraft like the SR-72, which could reach virtually any part of the world within a couple of hours. These vehicles have long been seen as distant prospects (the SR-72 might not reach service until 2030 at the earliest), but they now appear to be coming together. Lockheed tells the press that it expects to fly a demonstrator hypersonic aircraft "the size of an F-22" at a cost of less than $1 billion. That's no mean feat when some conventional programs cost more, and it's a hint that...

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