boom-sail

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• boom —   n. long spar extending foot of sail.    ♦ boom sail,    ♦ boom sheet, etc., sail, sheet, etc., attached to boom …   Dictionary of difficult words

• Sail twist — is a phenomenon in sailing where the head of the sail is at a different angle of attack from the foot of the sail in order to change the lift distribution with height. Twist is measured by comparing the angle of a straight line between the… …   Wikipedia

• Boom — (b[=oo]m), n. [D. boom tree, pole, beam, bar. See {Beam}.] 1. (Naut.) A long pole or spar, run out for the purpose of extending the bottom of a particular sail; as, the jib boom, the studding sail boom, etc. [1913 Webster] 2. (Mech.) A long spar… …   The Collaborative International Dictionary of English

• Boom iron — Boom Boom (b[=oo]m), n. [D. boom tree, pole, beam, bar. See {Beam}.] 1. (Naut.) A long pole or spar, run out for the purpose of extending the bottom of a particular sail; as, the jib boom, the studding sail boom, etc. [1913 Webster] 2. (Mech.) A… …   The Collaborative International Dictionary of English

• Boom — may refer to:Pole or spar application* Boom (sailing), spar at the foot of a sail on a sailboat * Boom (windsurfing), a wishbone shaped piece of windsurfing equipment * Boom barrier, a barrier used to block vehicular access through a controlled… …   Wikipedia

• boom — boom1 [bo͞om] vi. [ME bummen, to hum; like Du bommen, Ger bummen, orig. echoic] to make a deep, hollow, resonant sound vt. to speak or indicate with such a sound: usually with out [the clock boomed out the hour] n. 1. a booming sound, as of… …   English World dictionary

• Boom — (b[=oo]m), v. t. (Naut.) To extend, or push, with a boom or pole; as, to boom out a sail; to boom off a boat. [1913 Webster] …   The Collaborative International Dictionary of English

• Boom — (b[=oo]m), v. i. [imp. & p. p. {Boomed}, p. pr. & vb. n. {Booming}.] [Of imitative origin; cf. OE. bommen to hum, D. bommen to drum, sound as an empty barrel, also W. bwmp a hollow sound; aderyn y bwmp, the bird of the hollow sound, i. e., the… …   The Collaborative International Dictionary of English

• boom — Ⅰ. boom [1] ► NOUN ▪ a loud, deep, resonant sound. ► VERB ▪ make this sound. DERIVATIVES booming adjective boomy adjective. ORIGIN imitative; perhaps from Dutch bommen to hum, buzz …   English terms dictionary

• Boom (sailing) — In sailing, a boom is a spar (pole), along the foot (bottom) of a fore and aft rigged sail, that greatly improves control of the angle and shape of the sail. The primary action of the boom is to keep the foot of the sail flatter when the sail… …   Wikipedia

• Sail-plan — A sail plan is a set of drawings, usually prepared by a naval architect. It shows the various combinations of sail proposed for a sailing ship.The combinations shown in a sail plan almost always include three configurations:A light air sail plan …   Wikipedia