The basic idea behind [Matthias]’ air raid siren is to make two impellers that force air through two stators along the perimeter of the rotor. As the siren spins, the air coming from the ...

The rotor and frame for the parts are 3D printed ... geopolitical rants for when they’re a bit older. We’ve seen air raid siren builds before, too – like this sturdy wooden unit.

Air raid sirens sounded in Tel Aviv on Tuesday, an AFP journalist reported, with the Israeli military saying it had intercepted three projectiles fired from Lebanon. "Following the sirens that ...

Israel’s air force shot down two rockets from Lebanon that set off air raid sirens in Tel Aviv on Wednesday, the military said, as US Secretary of State Antony Blinken was on a visit to the city.

Israeli Military Says Air Raid Sirens That Sounded in Southern Israel Were False Alarm CAIRO (Reuters) - The Israeli military said in a statement that air raid sirens that sounded in southern ...

KIEV, November 15. /TASS/. Air raid sirens went off in a number of Ukrainian regions on Monday night, according to the official air raid resource. Air raid sirens are sounding in the Poltava ...

The Israeli army said air raid sirens were activated across central Israel after projectiles were fired from across the border with Lebanon on Wednesday. "Sirens were sounded in a number of areas ...

KIEV, December 29. /TASS/. Air raid sirens went off in some regions of Ukraine in the early hours of Thursday, according to the official air raid resource. Air raid sirens are sounding in the ...

Air-raid siren sounds the warning. Air-raid sirens first sounded the warning in London in September 1939. They became an almost daily part of life in the capital a year later during the height of ...