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If the mast has a long, thin cross-section and makes up a significant area of the airfoil, it is called a wing-mast; boats using these have a smaller sail area to compensate for the larger mast area. There are many manufacturers of modern masts for sailing yachts of all sizes, a few notable companies are Hall Spars, Offshore Spars, and Southern ...
Unstayed masts are found on traditional American catboats, Dutch fishing vessels ranging up to 60 feet, recent schooners in the 70 foot range and the large sailing yacht A. Freedom Yachts and Nonsuch produced a large number of yachts up to 45 feet with unstayed masts. Unstayed masts may provide better aerodynamics but require careful design ...
A transmatch (antenna tuner) is not required to use this antenna near its nominal design frequency of 14 MHz, and judicious length adjustments can sometimes include one other frequency band. All other frequencies require a transmatch. [citation needed] There are many variants of the G5RV antenna. Two variations of the G5RV design, called ZS6BKW ...
Many mast-aft rigs utilize a small mainsail and multiple staysails that can resemble some cutter rigs. A cutter is a single masted vessel, differentiated from a sloop either by the number of staysails, with a sloop having one and a cutter more than one, or by the position of the mast, with a cutter's mast being located between 50% and 70% of the way from the aft to the front of the sailplan ...
Tallest ever mast aboard any ship. It was replaced by horizontal wire antenna between two shorter masts. KTUL Tower Coweta, OK: December 26, 1987: Lattice steel guyed tower 582 Ice storm Listed at 1909 feet a mast in NRTA Transmitting Station 501, Anning, Kunming, Yunnan, China: January 1988: Guyed steel lattice mast 143.5 Material fault and ...
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A criticism is that the boats need to be reefed in relatively lower winds, when heading to the wind. Proponents argue that the Santa Cruz more than makes up for this deficiency in the downwind leg of a race. Santa Cruz has recently begun manufacturing a 61-foot (19 m) power boat named the Coastal Flyer, which sells for about $750,000.
The antenna used for broadcasting through the 1920s was the T-antenna, which consisted of two masts with loading wires on top, strung between them, requiring twice the construction costs and land area of a single mast. [2] (pp 77–78) In 1924 Stuart Ballantine published two historic papers which led to the development of the single mast antenna.
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