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Three different sizes of balsa wood stock. Balsa lumber is very soft and light, with a coarse, open grain. The density of dry balsa wood ranges from 40 to 475 kg/m 3, with a typical density around 160 kg/m 3. [5] [6] [7] Balsa is the softest wood ever measured using the Janka hardness test (22 to 167 lbf). [8] The wood of the living tree has ...
The large balsa logs, lashed together with henequen fiber, formed the main deck of a raft. Seawater passed freely between and over the logs making it very difficult for rafts to be swamped by heavy seas. [7] Atop the large balsa logs was a platform or multiple platforms, constructed of cane or bamboo which kept the cargo and passengers dry ...
Cross-pieces of balsa logs 5.5 m (18 ft) long and 30 cm (1 ft) in diameter were lashed across the logs at 91 cm (3 ft) intervals to give lateral support. Pine splashboards clad the bow, and lengths of pine 25 mm (1 in) thick and 60 cm (2 ft) wide were wedged between the balsa logs and used as centreboards.
The second raft, La Balsa (Spanish for The Raft), featured a balsa wood and hemp rope built structure, to which was attached two hardwood masts, to support a square canvas sail. [3] In contrast to the oar used for steering on Kon-Tiki, the La Balsa featured a hardwood moving keelboard (known as Guaras in Ecuador) which allowed it to be actively ...
Large rafts made of balsa logs and using sails for navigation were important in maritime trade on the Pacific Ocean coast of South America from pre-Columbian times until the 19th century. Voyages were made to locations as far away as Mexico, and many trans-Pacific voyages using replicas of ancient rafts have been undertaken to demonstrate ...
Many sailing spars are frequently made of aluminium after 1960. It is the lightest material for building large boats (being 15–20% lighter than polyester and 30% lighter than steel). Aluminium is relatively cheap in comparison with wood or steel in most countries. In addition it is relatively easy to cut, bend and weld.
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