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Halon 1301 is widely used by the U.S. Military [7] and NASA in a 2-3/4 lb portable extinguisher with a sealed, disposable cylinder for quick recharging. Other agents such as CO 2 and FE-36 (HFC-236fa) wet chemical are largely replacing halon 1301 for environmental concerns. Civilian models in 2-3/4, 3, and 4 lb sizes were also made.
Bromochlorodifluoromethane (BCF), also referred to by the code numbers Halon 1211 and Freon 12B1, is a haloalkane with the chemical formula C F 2 Cl Br. It is used for fire suppression, especially for expensive equipment or items that could be damaged by the residue from other types of extinguishers. [ 1 ]
2,2-Dichloro-1,1,1-trifluoroethane can be produced by reacting tetrachloroethylene with hydrogen fluoride in the gas phase. This is an exothermic reaction and requires a catalyst: This is an exothermic reaction and requires a catalyst:
1,2-Dibromotetrafluoroethane (C 2 Br 2 F 4) is a haloalkane. It is also known under codenames R-114B2 and Halon 2402. It is a colorless liquid with a boiling point of 47.2 °C. R-114B2 is occasionally used in fire suppression systems. It is highly volatile, passes through soil to air, and can be detected in the parts-per-quadrillion range. [2]
For example, R-22 has one carbon atom, one hydrogen atom (2−1 = 1), two fluorine atoms, and one chlorine atom (4−2−1 = 1), so it is chlorodifluoromethane, while R-134 has two carbon atoms (2−1 = 1), two hydrogen atoms (3−1 = 2), four fluorine atoms, and no chlorine atoms (6−2−4 = 0), so it is one of the tetrafluoroethanes. This ...
Manufacturers produce reeds in different strengths, indicated by a number (most commonly 2, 2.5, 3, 3.5, 4, 4.5, and 5). [9] The strength is determined by a machine that presses against the vamp (the part that includes the tip and the "heart" just behind the tip) of the reed and determines how stiff the reed is.
As originally designed, the SLQ-32 was produced in three variants, the (V)1, (V)2 and (V)3. Later in its service life, additional versions were built, the (V)4 and (V)5. Today, (V)6 and (V)7 versions are in production. The Air Transport Rack sized processors were supplied by ROLM Mil-Spec Computers in San Jose, California. AN/SLQ-32(V)1 – A ...
The Cannone da 75/32 was designed by Ansaldo and the first examples were produced in 1937. After Italy surrendered, guns captured by Germany were designated 7.5 cm FK248(i) . This gun was used in Russia with the ARMIR (ARMata Italiana in Russia - Italian Army in Russia) in the "201º Reggimento d'artiglieria motorizzato" and it had good results ...