size: 3MB, Parts: [11/11]
11 image files
Before radar, detecting incoming aircraft was crude as well as creative! [1/6] - A two-horn system at Bolling Field, USA, 1921.jpg
Before radar, detecting incoming aircraft was crude as well as creative! [2/6] - acoustic locator could detect targets at distances from 5 to 12 km, depending on weather conditions, operator skill, and the size of the target formation.jpg
Before radar, detecting incoming aircraft was crude as well as creative! [3/6] - Czech locator, 1920s. Scoop-shaped reflectors direct the sound into large-diameter tubes..jpg
Before radar, detecting incoming aircraft was crude as well as creative! [4/6] - Dutch personal horns 1930s.jpg
Before radar, detecting incoming aircraft was crude as well as creative! [5/6] - Dutch personal parabola, 1930s.jpg
Before radar, detecting incoming aircraft was crude as well as creative! [6/6] - early radar system in operation at an aerodrome in the south of England. 1930s...(looks like sound not 'radar').jpg
Before radar, detecting incoming aircraft was crude as well as creative! - ears1_0.jpg ...
Before radar, detecting incoming aircraft was crude as well as creative! [1/4] - Perrin acoustic locator on trial in France. 1930s.jpg
Before radar, detecting incoming aircraft was crude as well as creative! [2/4] - Sound location equipment in Germany, 1939. It consists of four acoustic horns, a horizontal pair and a vertical pair.jpg
Before radar, detecting incoming aircraft was crude as well as creative! [3/4] - Swedish soldiers operating an acoustic locator in 1940.jpg
Before radar, detecting incoming aircraft was crude as well as creative! [4/4] - Three Japanese acoustic locators, colloquially known as 'war tubas'.jpg
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