I have seen the future, and it's this 3D-printed air raid siren honking its baleful tones over my neighbourhood as the waters rise
Impressive. A potentiometer attached to the speed controller means the pitch can be adjusted by ramping the speed of the motor up and down, meaning those wooooos can become weeeees, and so forth. And ...
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Masters of the Air: The Perilous Reputation and Crucial Victories of the Real 100th Bomb Group
The U.S. Air Force unit and its deadly missions in World War II are also the subject of a new Apple TV+ documentary.
Innovators gear up work on ‘green’ hydrogen plane with plans for nonstop 9-day trip around Earth
Swiss aviation pioneer Bertrand Piccard is developing a plane powered by liquid hydrogen after a much-hyped flight in 2015 ...