axis pin
41Course Setting Bomb Sight — The CSBS Mk. IX mounted in a Fairey Battle. The bomb aimer is sighting through the white ring shaped backsights to the pin shaped foresights (just visible against the armoured cable) and holding the bomb release switch in his right hand. The… …
42Mathematical discussion of rangekeeping — In naval gunnery, when long range guns became available, an enemy ship would move some distance after the shells were fired. It became necessary to figure out where the enemy ship, the target, was going to be when the shells arrived. The process… …
43Second Battle of El Alamein — Part of Western Desert Campaign …
44Sundial — A sundial is a device that measures time by the position of the Sun. In common designs such as the horizontal sundial, the sun casts a shadow from its style (a thin rod or a sharp, straight edge) onto a flat surface marked with lines indicating… …
45Allied invasion of Sicily — Sicilian Campaign Part of Italian Campaign of World War II The U.S. Liberty ship Robert Rowan explodes after being hit by a German …
46Steering — For other uses, see Steering (disambiguation). Part of car steering mechanism: tie rod, steering arm, king pin axis (using ball joints). Steering is the term applied to the collection of components, linkages, etc. which will allow a vessel (ship …
47Eastern Front (World War II) — Great Patriotic War redirects here. For a discussion of the term itself, see Great Patriotic War (term). Not to be confused with Patriotic War of 1812. Eastern Front Part of World War II …
48Point groups in three dimensions — In geometry, a point group in three dimensions is an isometry group in three dimensions that leaves the origin fixed, or correspondingly, an isometry group of a sphere. It is a subgroup of the orthogonal group O(3), the group of all isometries… …
49Glossary of botanical terms — Many of the terms used in Wikipedia glossaries (often most) are already defined and explained within Wikipedia itself. However, lists like the following indicate where new articles need to be written and are also useful for looking up and… …
50Swivel — Swiv el, n. [AS. sw[=i]fan to move quickly, to remove; akin to Icel. sveifla to whirl, shake, sv[=i]fa to ramble, to turn. See {Swoop}, and cf. {Swift} a reel, {Swift}, a.] 1. (Mech.) A piece, as a ring or hook, attached to another piece by a pin …
