Pollaxe Pollaxe The pollaxe is a type of European polearm. It was widely used by medieval infantry. It is also known by the names poleaxe, pole-axe, pole axe, polax, and Hache (French meaning axe). The term has become synonymous with felling or striking down with delivery of a blow. Weapons such as the halberd, bardiche, and Danish axe are sometimes mistakenly called pollaxes as they are indeed axes mounted on poles, but many etymological authorities consider the "poll"- prefix historically unrelated to "pole", instead meaning "head". However, some etymologists, including Eric Partridge, believe that the word is derived from "pole". The
Radar configurations and types Radar configurations and types Radar configurations and types is an article about listing the different uses of radars. Radar come in a variety of configuration in the emitter, the receiver, the antenna, wavelength, scan strategies, etc. Search radars scan great volumes of space with pulses of short radio waves. They typically scan the volume two to four times a minute. The waves are usually less than a meter long. Ships and planes are metal, and reflect radio waves. The radar measures the distance to the reflector by measuring the time of the roundtrip from emission of a pulse to reception,