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Hot wire anemometers use a fine wire (on the order of several micrometres) electrically heated to some temperature above the ambient. Air flowing past the wire cools the wire. As the electrical resistance of most metals is dependent upon the temperature of the metal ( tungsten is a popular choice for hot-wires), a relationship can be obtained ...
Others use handheld anemometers. Rulers or baseballs may be brought along for measuring hail and for showing as a comparison object. Vehicle mounted cameras, such as on the roof or more commonly on the dash, provide continuous visual recording capability. Chasers heavily utilized still photography since the beginning.
Other accessories include hand-held (digital) anemometers for accurate wind speed information and LED lights that attach to the frame of the kite to allow for night flying. Some manufacturers offer replacement spars or spare components for their kites, for replacing damaged components after a particularly unforgiving crash landing.
Devices used to measure weather phenomena in the mid-20th century were the rain gauge, the anemometer, and the hygrometer. The 17th century saw the development of the barometer and the Galileo thermometer while the 18th century saw the development of the thermometer with the Fahrenheit and Celsius scales.
British smoke grenade with various markings, including "Grenade Hand Smoke Screening Training L83A1" designation. The L number ("L" standing for Land Service) [1] or weapon identity number [2] system is a numerical designation system used for the type classification of British Army weapons and related stores.
Highest monthly total (UK national average) [11] 266 hours UK (national average) May 2020 Highest monthly total (England) [2] 383.9 hours Eastbourne, Sussex: July 1911 Highest monthly total (Northern Ireland) [2] 298 hours Mount Stewart, County Down: June 1940 Highest monthly total (Scotland) [2] 329.1 hours Tiree, Argyll & Bute: May 1975
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