|
Guara (centerboard)
A guara is a hardwood centerboard used in Pre-Columbian rafts, Andean rafts. The Tangaroa Expedition outperformed ''Kon-Tiki'' in part due to using guaras. References Sailing ship components {{sailing-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Centerboard
A centreboard or centerboard (US) is a retractable hull appendage which pivots out of a slot in the hull of a sailboat, known as a ''centreboard trunk'' (UK) or ''centerboard case'' (US). The retractability allows the centreboard to be raised to operate in shallow waters, to move the centre of lateral resistance (offsetting changes to the sailplan that move the centre of effort aft), to reduce drag when the full area of the centreboard is not needed, or when removing the boat from the water, as when trailering. A centreboard which consists of solely a pivoting metal plate is called a centerplate. A daggerboard is similar but slides vertically rather than pivoting. The analog in a scow is a bilgeboard: these are fitted in pairs and used one at a time. General History Lt. John Schank (c. 1740 – 6 February 1823) was an officer of the British Royal Navy and is credited with the invention of the centerboard. Schank, however, gave credit for the idea to British Brigadier General ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pre-Columbian Rafts
Pre-Columbian rafts plied the Pacific Coast of South America for trade from about 100 BCE, and possibly much earlier. The 16th century descriptions by the Spanish of the rafts used by Native Americans along the seacoasts of Peru and Ecuador has incited speculation about the seamanship of the Indians, the seaworthiness of their rafts, and the possibility that they undertook long ocean-going voyages. None of the prehistoric rafts have survived and the exact characteristics of their construction and the geographical extent of their voyages are uncertain. It is likely that traders using rafts, constructed of balsa wood logs, voyaged as far as Mexico and introduced metallurgy to the civilizations of that country. Some scholars and adventurers of the 20th and 21st century (most notably Thor Heyerdahl) who reached Polynesia on the Kon-Tiki raft have asserted that the rafts and their crews journeyed thousands of miles across the Pacific to Polynesia. Several other people and groups have ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kon-Tiki
The ''Kon-Tiki'' expedition was a 1947 journey by raft across the Pacific Ocean from South America to the Polynesian islands, led by Norwegian explorer and writer Thor Heyerdahl. The raft was named ''Kon-Tiki'' after the Inca god Viracocha, for whom "Kon-Tiki" was said to be an old name. ''The Kon-Tiki Expedition: By Raft Across the South Seas, Kon-Tiki'' is also the name of Heyerdahl's book, the Academy Award for Best Documentary Feature, Academy Award–winning Kon-Tiki (1950 film), 1950 documentary film chronicling his adventures, and the Kon-Tiki (2012 film), 2012 dramatized feature film nominated for the Academy Award for Best Foreign Language Film. Heyerdahl believed that people from South America could have reached Polynesia during pre-Columbian times. His aim in mounting the ''Kon-Tiki'' expedition was to show, by using only the materials and technologies available to those people at the time, that there were no technical reasons to prevent them from having done so. Alth ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
.svg "Click for more on -> Centerboard")
.jpg "Click for more on -> Pre-Columbian Rafts")
