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The tempest prognosticator, also known as the leech barometer, is a 19th-century invention by George Merryweather in which leeches are used in a barometer. The twelve leeches are kept in small bottles inside the device; when they become agitated by an approaching storm, they attempt to climb out of the bottles and trigger a small hammer which ...
His best-known invention was the Tempest Prognosticator—a weather predicting device also called "The Leech Barometer". [2] It consists of twelve glass bottles containing leeches, which, when disturbed by the atmospheric conditions preceding a storm, climb upwards, triggering a small whalebone hammer which rings a bell. Merryweather referred ...
TEMPEST is a codename, not an acronym under the U.S. National Security Agency specification and a NATO certification [1] [2] referring to spying on information systems through leaking emanations, including unintentional radio or electrical signals, sounds, and vibrations.
The Smith predictor (invented by O. J. M. Smith in 1957) is a type of predictive controller designed to control systems with a significant feedback time delay. The idea can be illustrated as follows. The idea can be illustrated as follows.
The Kerrison predictor did not calculate fuse settings, as the shells fired by the 40 mm Bofors gun, with which it was designed to work, were contact-fused. [4] The Predictor proved to be able to hit practically anything that flew in a straight line, and it was particularly effective against dive bombers.
A simple predictor–corrector method (known as Heun's method) can be constructed from the Euler method (an explicit method) and the trapezoidal rule (an implicit method). Consider the differential equation
Although very light, with a standard empty weight of 200 lb (91 kg), the Tempest does not qualify under the US FAR 103 Ultralight Vehicles regulations as a hang glider, neither is it foot-launchable. When it was available the aircraft was supplied as a kit , that required an estimated 200 hours to complete, or as a complete ready-to-fly aircraft.
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