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Wood wing spars of multipiece construction usually consist of upper and lower members, called spar caps, and vertical sheet wood members, known as shear webs or more simply webs, that span the distance between the spar caps. Even in modern times, "homebuilt replica aircraft" such as the replica Spitfires use laminated wooden spars.
A spar is a pole of wood, metal or lightweight materials such as carbon fibre used in the rigging of a sailing vessel to carry or support its sail. These include yards , booms , and masts , which serve both to deploy sail and resist compressive and bending forces, as well as the bowsprit and spinnaker pole .
The mast of a sailing vessel is a tall spar, or arrangement of spars, erected more or less vertically on the centre-line of a ship or boat. Its purposes include carrying sails, spars, and derricks, giving necessary height to a navigation light, look-out position, signal yard, control position, radio aerial or signal lamp. [1]
Cantilever wings require much stronger and heavier spars than would otherwise be needed in a wire-braced design. However, as the speed of the aircraft increases, the drag of the bracing increases sharply, while the wing structure must be strengthened, typically by increasing the strength of the spars and the thickness of the skinning.
SPARS was the authorized nickname for the United States Coast Guard (USCG) Women's Reserve. The nickname is an acronym fashioned from the USCG's motto, Latin : "Semper Paratus "—"Always Ready" ( SPAR ).
The bowsprit of a sailing vessel is a spar extending forward from the vessel's prow. The bowsprit is typically held down by a bobstay that counteracts the forces from the forestays. The bowsprit’s purpose is to create anchor points for the sails that extend beyond the vessel’s bow, increasing the size of sail that may be held taut.
Kamala Harris, Donald Trump spar in debate: See photos of facial expressions, reactions. Max Hauptman, USA TODAY. Updated September 11, 2024 at 12:22 PM.
For a given sail area a gaff rig has a shorter mast than a Bermudan rig.In short-ended craft with full body, heavy displacement and moderate ballast ratio, it is difficult to set enough sail area in the Bermudan rig without a mast of excessive height and a centre of effort (CE) too high for the limited stability of the hull. [8]