An unguided bomb , also known as a free-fall bomb , gravity bomb , dumb bomb , or iron bomb , is an aircraft-dropped bomb (conventional or nuclear) that does not contain a guidance system and hence simply follows a ballistic trajectory . It includes all aircraft bombs in general service until the latter half of World War II , and the vast majority until the late 1980s, which were known simply as "bombs".
5-547: UGB may mean: An unguided bomb L'Université Gaston Berger , located outside Saint-Louis, was the second university established in Senegal (the first being Cheikh Anta Diop University), see Gaston Berger University Unión de Guerreros Blancos ( White Warriors' Union ), a death squad founded to repress leftist elements in El Salvador Urban growth boundary ,
10-500: A specific distance from the ground or other target. The retarded bomb uses a mechanical method of creating increased aerodynamic drag , such as a parachute , ballute , or drag-inducing petals. These deploy after the ordnance is released, slowing its fall and abbreviating its forward trajectory, giving the aircraft time to get clear of the blast zone when bombing from low altitudes or with nuclear ordnance. However, these bombs are less accurate than conventional free-fall bombs. Generally
15-692: A term in urban planning Usines Gustave Boël , Belgian iron and steel company Uttarakhand Gramin Bank , a co-operative bank in Uttarakhand, India Topics referred to by the same term [REDACTED] This disambiguation page lists articles associated with the title UGB . If an internal link led you here, you may wish to change the link to point directly to the intended article. Retrieved from " https://en.wikipedia.org/w/index.php?title=UGB&oldid=1115361729 " Category : Disambiguation pages Hidden categories: Short description
20-491: Is different from Wikidata All article disambiguation pages All disambiguation pages Unguided bomb Then, with the dramatically increased use of precision-guided munitions , a retronym was needed to separate "smart bombs" from free-fall bombs. "Dumb bomb" was used for a time, but many military circles felt it sounded trite, and eventually "gravity bomb" gained popularity. Bomb casings for unguided bombs are typically aerodynamic in shape, often with fins at
25-429: The tail section, which reduce drag and increase stability after release, both of which serve to improve accuracy and consistency of trajectory. Unguided bombs typically use a contact fuze for detonation upon impact, or some milliseconds after if a penetration effect is required. Alternatives include a fuze with an altimeter to cause an air burst at the desired altitude, and a proximity fuze to cause an air burst at
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