field markings
51Compass and straightedge constructions — Creating a regular hexagon with a ruler and compass Construction of a regular pentagon Compass and straightedge or ruler and compass construction is the construction of lengths, angl …
52Button football — is a football (soccer) simulation game played on a table top utilizing concave disks or buttons as players. Board dimensions, markings, and rules of play are modeled to simulate standard football. It is popular throughout all of Brazil, and… …
53Tail Code — Tail codes are the markings usually on the vertical stabilizer of U.S. military aircraft that help characterize the aircraft s unit and/or base assignment and occasionally other information that is not unique. This is not the same as the serial… …
54Races of the Mass Effect universe — This article is about the fictional races found within the Mass Effect universe. These races are explored in the novels Mass Effect: Revelation and Mass Effect: Ascension, and the video games Mass Effect, Mass Effect Galaxy, and Mass Effect 2.… …
55Lockheed P-3 Orion — P 3 Orion A P 3C Orion of Patrol Squadron 22 (VP 22) flies over Japan, 1 December 1991. Role Maritime p …
56Republic P-47 Thunderbolt — P 47 Thunderbolt In flight view of a prototype of the Republic P 47N Thunderbolt Role Fighter bomber …
57Long Range Desert Group — The Long Range Desert Group (LRDG) was a British Army unit during World War II. The unit was founded in Egypt, following the Italian declaration of war in June 1940, by Major Ralph A. Bagnold with the assistance of Captains Patrick Clayton and… …
58Fuse (electrical) — A miniature time delay fuse used to protect electronic equipment, rated 0.3 amperes at 250 volts. 1.25 inches (about 32 mm) long …
59Government procurement in the United States — is based on many of the same principles as commercial contracting, but is subject to special laws and regulation as described below. Persons entering into commercial contracts are pretty much free to do anything that they can agree on. Each… …
60P-51 Mustang — infobox Aircraft name = P 51 Mustang type = Fighter manufacturer =North American Aviation caption = North American P 51 Mustangs of the 375th Fighter Squadron, 361st FG, summer 1944 first flight =26 October 1940 introduction =1942 retired =1957,… …
