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Shade sail over playground in Australia. A shade sail − or somewhat more precise a textile sunshade sail or a textile sun protection sail − is a device to create outdoor shade based on the textile basic technology that can be found in a ship's sail. [1] Shade sails use a flexible membrane tensioned between several anchor points. While ...
SAIL Outdoors Inc. is a Canadian retailing company specializing in outdoor equipment and sport equipment. The company is more than 40 years old and had about 1,100 employees as of June 2021. [1] [2] [3] With head office in Quebec. [4] The Quebec-based retailer operates two chains: [5]
Proposed shade designs include a single-piece shade and a shade made by a great number of small objects. Most such proposals contemplate a blocking element at the Sun-Earth L1 Lagrangian point . Modern proposals are based on some form of distributed sunshade composed of lightweight transparent elements or inflatable "space bubbles" manufactured ...
The yard exists to allow square sails to be set to drive the ship. The top edge of the sail is 'bent on' (attached) to the yard semi-permanently. Clewlines and buntlines are led along the yard and from there to the mast and down to the deck. These allow the bottom of the sail to be hoisted up to the yard, so the sail is effectively folded in two.
Sail operating temperatures are a function of solar distance, sail angle, reflectivity, and front and back emissivities. A sail can be used only where its temperature is kept within its material limits. Generally, a sail can be used rather close to the Sun, around 0.25 AU, or even closer if carefully designed for those conditions. [3]
To balance out the sail plan the next obvious step was to add a mast fore of the main-mast, which first appears in a Catalan ink drawing from 1409. With the three-masted ship established, propelled by square rig and lateen, and guided by the pintle -and- gudgeon rudder , all advanced ship design technology necessary for the great transoceanic ...