The Zano flying camera is a great tool for snapping pictures of yourself—and it’s far more sophisticated than a selfie stick. The $300 quadcopter uses a suite of instruments to dodge obstacles while autonomously tracking its subjects whether they’re walking through an office, biking down mountain trails, or even diving off cliffs. Lead engineer Ivan Reedman of Torquing Group advises against underestimating Zano’s abilities: “It’s not just a selfie drone.”
Single generator sets of over 600 MW are now used in the UK, though there are many smaller generators in use. A 600 MW generator can supplythe average needs of over 1 million UK households. Three or four such generators are typically installed in a single large coal-fired station which isoften sited close to a coal mine, away from the city dwellers who consume the electricity. Such generators are usually driven by a compound arrangement of highpressure, intermediate-pressure and low-pressure turbines, increasing in size as the pressure decreases. Modern turbines rotate in a speed range from 1500 to 3500 r.p.m., usually 3000 r.p.m. for the UK’s 50 Hz system. For large coal-fired plant the steam pressure could be 25 megapascals (MPa) with steam temperatures of 500–600 °C to improve the thermodynamic efficiency. In nuclear reactors, which operate under less demanding conditions, the steam is superheated to about 5 MPa and 300 °C. Modern water tube boilers are complex and have ...
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