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Guía Roji (Roji's Guides) is a cartography company based in Mexico City. Guía Roji was created in 1928 by Joaquín Palacios Roji Lara. Since that year, the characteristic cover color of the map books has been red. The first maps showed the reduced size of Mexico City in the 1920s. In the late 1960s, the number of maps began to increase ...
Rheinmetall Zwillingsflak twin-gun anti-aircraft system began development in 1968 to meet the requirements of the low-level air defence units of the German Air Force, i.e. "to engage low and very low approaching enemy aircraft with all appropriate means in time to prevent them from firing their weapons or delivering their ordnance, or at least to prevent them from carrying out an accurate ...
The MG FF was a drum-fed, blowback-operated, 20 mm aircraft autocannon, developed in 1936 by Ikaria Werke Berlin of Germany. It was a derivative of the Swiss Oerlikon FF F cannon (its FF suffix indicating Flügel Fest, for a fixed-mount, wing location from the Swiss original), with the Oerlikon FF design itself a development of the Imperial German World War I Becker 20 mm cannon, and was ...
Glucono-δ-lactone (GDL), also known as gluconolactone, is an organic compound with the formula (HOCH) 3 (HOCH 2 CH)CO 2. A colorless solid, it is an oxidized derivative of glucose . It is typically produced by the aerobic oxidation of glucose in the presence of the enzyme glucose oxidase .
The M39 cannon with its 20 mm ammunition chute. The M39 cannon is a 20 mm caliber single-barreled revolver cannon developed for the United States Air Force in the late 1940s. It was used on a number of fighter aircraft from the early 1950s through the 1980s.
The M940 MPT-SD (multi-purpose tracer, self-destruct) shell is a 20×102 mm round produced by General Dynamics primarily for an anti-aircraft role. It has a range of over 2,000 metres (6,600 ft). The round includes a red tracer to aid in targeting.
The GDL utilised smokeless (TNT) gunpowder on a non-volatile solvent for solid propellant rockets. The first test-firing of a solid fuel rocket was carried out in March 1928, which flew for about 1,300 meters [4] In 1931 the world's first successful use of rockets to assist take-off of aircraft were carried out on a U-1, the Soviet designation for an Avro 504 trainer, which achieved about one ...
[3] A special variant, the Madsen F5 was designed as an anti-tank gun. It proved very effective against the Japanese tanks until the end of the Second Sino-Japanese War. It was a fully automatic weapon, with two small wheels and a 15-round magazine. At 100 m, it was able to pierce 42 mm of armor, and 32 mm at 500 m. [4]