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The system was known as "Sun Tracker", and to test it a plane capable of high-altitude flight followed by a rapid low-level flight was needed. The B-29 was a useful test platform as it was the first mass-produced aircraft with a pressurized cockpit, and after World War II there were many surplus B-29s available.
A solar tracker is a device that orients a payload toward the Sun. Payloads are usually solar panels, parabolic troughs, Fresnel reflectors, lenses, or the mirrors of a heliostat. For flat-panel photovoltaic systems, trackers are used to minimize the angle of incidence between the incoming sunlight and a photovoltaic panel, sometimes known as ...
Burt's solar compass or astronomical compass/sun compass is a surveying instrument that makes use of the Sun's direction instead of magnetism. William Austin Burt invented his solar compass in 1835. The solar compass works on the principle that the direction to the Sun at a specified time can be calculated if the position of the observer on the ...
USS Sequoia is the former presidential yacht used during the administrations of Herbert Hoover through Jimmy Carter; setting a cost-cutting example, Carter ordered her sold in 1977. Often called the “floating White House”, the Sequoia offered presidents, first families and high-ranking government officials a place to escape the complexities ...
79th Street Boat Basin. Coordinates: 40°47′10″N 73°59′07″W. Boat Basin as seen from Guttenberg, New Jersey across the Hudson River. The 79th Street Boat Basin is a marina located in the Hudson River on the Upper West Side of Manhattan in New York City, within Riverside Park at the western end of 79th Street. Maintained and operated by ...
The key distinguishing feature of a narrowboat is its width, which must be less than 7 feet (2.13 m) wide to navigate British narrow canals. Some old boats are very close to this limit (often built 7 feet 1 + 1 ⁄ 2 inches or 2.17 metres or slightly wider), and can have trouble using certain narrow locks whose width has been reduced over time because of subsidence.
The Khufu ship is one of the oldest, largest, best preserved vessels from antiquity. It is 43.4 metres (142 ft) long, 5.9 metres (19 ft) wide, and 1.78 meters (5.83 ft) deep, and is the world's oldest intact ship. It has been described as "a masterpiece of woodcraft" that could sail today if put into a lake or a river.
Sunseeker International is a British luxury performance motor yacht brand. Originally named Poole Power Boats, the company was founded by brothers Robert and John Braithwaite in 1969. The company changed its name to Sunseeker International in 1985 and has since become a global icon.
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